LPC1759/58/56/54/52/51
32-bit ARM Cortex-M3 MCU; up to 512 kB flash and 64 kB
SRAM with Ethernet, USB 2.0 Host/Device/OTG, CAN
Rev. 8.6 — 18 August 2015
Product data sheet
1. General description
The LPC1759/58/56/54/52/51 are ARM Cortex-M3 based microcontrollers for embedded
applications featuring a high level of integration and low power consumption. The ARM
Cortex-M3 is a next generation core that offers system enhancements such as enhanced
debug features and a higher level of support block integration.
The LPC1758/56/57/54/52/51 operate at CPU frequencies of up to 100 MHz. The
LPC1759 operates at CPU frequencies of up to 120 MHz. The ARM Cortex-M3 CPU
incorporates a 3-stage pipeline and uses a Harvard architecture with separate local
instruction and data buses as well as a third bus for peripherals. The ARM Cortex-M3
CPU also includes an internal prefetch unit that supports speculative branching.
The peripheral complement of the LPC1759/58/56/54/52/51 includes up to 512 kB of flash
memory, up to 64 kB of data memory, Ethernet MAC, USB Device/Host/OTG interface,
8-channel general purpose DMA controller, 4 UARTs, 2 CAN channels, 2 SSP controllers,
SPI interface, 2 I2C-bus interfaces, 2-input plus 2-output I2S-bus interface, 6 channel
12-bit ADC, 10-bit DAC, motor control PWM, Quadrature Encoder interface, 4 general
purpose timers, 6-output general purpose PWM, ultra-low power Real-Time Clock (RTC)
with separate battery supply, and up to 52 general purpose I/O pins.
For additional documentation, see Section 19 “References”.
2. Features and benefits
ARM Cortex-M3 processor, running at frequencies of up to 100 MHz
(LPC1758/56/57/54/52/51) or of up to 120 MHz (LPC1759). A Memory Protection Unit
(MPU) supporting eight regions is included.
ARM Cortex-M3 built-in Nested Vectored Interrupt Controller (NVIC).
Up to 512 kB on-chip flash programming memory. Enhanced flash memory accelerator
enables high-speed 120 MHz operation with zero wait states.
In-System Programming (ISP) and In-Application Programming (IAP) via on-chip
bootloader software.
On-chip SRAM includes:
Up to 32 kB of SRAM on the CPU with local code/data bus for high-performance
CPU access.
Two/one 16 kB SRAM blocks with separate access paths for higher throughput.
These SRAM blocks may be used for Ethernet (LPC1758 only), USB, and DMA
memory, as well as for general purpose CPU instruction and data storage.
NXP Semiconductors
LPC1759/58/56/54/52/51
32-bit ARM Cortex-M3 microcontroller
Eight channel General Purpose DMA controller (GPDMA) on the AHB multilayer
matrix that can be used with the SSP, I2S-bus, UART, the Analog-to-Digital and
Digital-to-Analog converter peripherals, timer match signals, and for
memory-to-memory transfers.
Multilayer AHB matrix interconnect provides a separate bus for each AHB master.
AHB masters include the CPU, General Purpose DMA controller, Ethernet MAC
(LPC1758 only), and the USB interface. This interconnect provides communication
with no arbitration delays.
Split APB bus allows high throughput with few stalls between the CPU and DMA.
Serial interfaces:
On the LPC1758 only, Ethernet MAC with RMII interface and dedicated DMA
controller.
USB 2.0 full-speed device/Host/OTG controller with dedicated DMA controller and
on-chip PHY for device, Host, and OTG functions. The LPC1752/51 include a USB
device controller only.
Four UARTs with fractional baud rate generation, internal FIFO, and DMA support.
One UART has modem control I/O and RS-485/EIA-485 support, and one UART
has IrDA support.
CAN 2.0B controller with two (LPC1759/58/56) or one (LPC1754/52/51) channels.
SPI controller with synchronous, serial, full duplex communication and
programmable data length.
Two SSP controllers with FIFO and multi-protocol capabilities. The SSP interfaces
can be used with the GPDMA controller.
Two I2C-bus interfaces supporting fast mode with a data rate of 400 kbit/s with
multiple address recognition and monitor mode.
On the LPC1759/58/56 only, I2S (Inter-IC Sound) interface for digital audio input or
output, with fractional rate control. The I2S-bus interface can be used with the
GPDMA. The I2S-bus interface supports 3-wire and 4-wire data transmit and
receive as well as master clock input/output.
Other peripherals:
52 General Purpose I/O (GPIO) pins with configurable pull-up/down resistors. All
GPIOs support a new, configurable open-drain operating mode. The GPIO block is
accessed through the AHB multilayer bus for fast access and located in memory
such that it supports Cortex-M3 bit banding and use by the General Purpose DMA
Controller.
12-bit Analog-to-Digital Converter (ADC) with input multiplexing among six pins,
conversion rates up to 200 kHz, and multiple result registers. The 12-bit ADC can
be used with the GPDMA controller.
On the LPC1759/58/56/54 only, 10-bit Digital-to-Analog Converter (DAC) with
dedicated conversion timer and DMA support.
Four general purpose timers/counters, with a total of three capture inputs and ten
compare outputs. Each timer block has an external count input. Specific timer
events can be selected to generate DMA requests.
One motor control PWM with support for three-phase motor control.
Quadrature encoder interface that can monitor one external quadrature encoder.
One standard PWM/timer block with external count input.
Real-Time Clock (RTC) with a separate power domain and dedicated RTC
oscillator. The RTC block includes 20 bytes of battery-powered backup registers.
LPC1759_58_56_54_52_51
Product data sheet
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32-bit ARM Cortex-M3 microcontroller
WatchDog Timer (WDT). The WDT can be clocked from the internal RC oscillator,
the RTC oscillator, or the APB clock.
ARM Cortex-M3 system tick timer, including an external clock input option.
Repetitive Interrupt Timer (RIT) provides programmable and repeating timed
interrupts.
Each peripheral has its own clock divider for further power savings.
Standard JTAG debug interface for compatibility with existing tools. Serial Wire Debug
and Serial Wire Trace Port options. Boundary scan Description Language (BSDL) is
not available for this device.
Emulation trace module enables non-intrusive, high-speed real-time tracing of
instruction execution.
Integrated PMU (Power Management Unit) automatically adjusts internal regulators to
minimize power consumption during Sleep, Deep sleep, Power-down, and Deep
power-down modes.
Four reduced power modes: Sleep, Deep-sleep, Power-down, and Deep power-down.
Single 3.3 V power supply (2.4 V to 3.6 V).
One external interrupt input configurable as edge/level sensitive. All pins on Port 0 and
Port 2 can be used as edge sensitive interrupt sources.
Non-maskable Interrupt (NMI) input.
The Wakeup Interrupt Controller (WIC) allows the CPU to automatically wake up from
any priority interrupt that can occur while the clocks are stopped in Deep sleep,
Power-down, and Deep power-down modes.
Processor wake-up from Power-down mode via any interrupt able to operate during
Power-down mode (includes external interrupts, RTC interrupt, USB activity, Ethernet
wake-up interrupt (LPC1758 only), CAN bus activity, Port 0/2 pin interrupt, and NMI).
Brownout detect with separate threshold for interrupt and forced reset.
Power-On Reset (POR).
Crystal oscillator with an operating range of 1 MHz to 25 MHz.
4 MHz internal RC oscillator trimmed to 1 % accuracy that can optionally be used as a
system clock.
PLL allows CPU operation up to the maximum CPU rate without the need for a
high-frequency crystal. May be run from the main oscillator, the internal RC oscillator,
or the RTC oscillator.
USB PLL for added flexibility.
Code Read Protection (CRP) with different security levels.
Unique device serial number for identification purposes.
Available as 80-pin LQFP package (12 mm 12 mm 1.4 mm).
3. Applications
LPC1759_58_56_54_52_51
Product data sheet
eMetering
Lighting
Industrial networking
Alarm systems
White goods
Motor control
All information provided in this document is subject to legal disclaimers.
Rev. 8.6 — 18 August 2015
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32-bit ARM Cortex-M3 microcontroller
4. Ordering information
Table 1.
Ordering information
Type number
Package
Name
Description
Version
LPC1759FBD80
LQFP80
plastic low-profile quad package; 80 leads; body 12 12 1.4 mm
SOT315-1
LPC1758FBD80
LQFP80
plastic low-profile quad package; 80 leads; body 12 12 1.4 mm
SOT315-1
LPC1756FBD80
LQFP80
plastic low-profile quad package; 80 leads; body 12 12 1.4 mm
SOT315-1
LPC1754FBD80
LQFP80
plastic low-profile quad package; 80 leads; body 12 12 1.4 mm
SOT315-1
LPC1752FBD80
LQFP80
plastic low-profile quad package; 80 leads; body 12 12 1.4 mm
SOT315-1
LPC1751FBD80
LQFP80
plastic low-profile quad package; 80 leads; body 12 12 1.4 mm
SOT315-1
4.1 Ordering options
Ordering options
LPC1758FBD80 LPC1758FBD80Y
512 32
Device/Host/OTG 2
yes
yes 52
GPIO
CAN
USB
Ethernet
Total
AHB SRAM1
16 16 64 no
DAC
512 32
I2S-bus
LPC1759FBD80 LPC1759FBD80,551
AHB SRAM0
CPU
Flash (kB)
Device order
part number
Type number
SRAM in kB
Maximum CPU
operating frequency
(MHz)
Table 2.
120
16 16 64 yes Device/Host/OTG 2
yes
yes 52
100
LPC1756FBD80 LPC1756FBD80/CP327 256 16
16 -
32 no
Device/Host/OTG 2
yes
yes 52
100
LPC1754FBD80 LPC1754FBD80,551
128 16
16 -
32 no
Device/Host/OTG 1
no
yes 52
100
LPC1752FBD80 LPC1752FBD80,551
64
16
-
-
16 no
Device only
1
no
no
52
100
LPC1751FBD80 LPC1751FBD80,551
32
8
-
-
8
Device only
1
no
no
52
100
LPC1759_58_56_54_52_51
Product data sheet
no
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32-bit ARM Cortex-M3 microcontroller
5. Marking
The LPC175x devices typically have the following top-side marking:
LPC175xxxx
xxxxxxx
xxYYWWR[x]
The last/second to last letter in the third line (field ‘R’) will identify the device revision. This
data sheet covers the following revisions of the LPC175x:
Table 3.
Device revision table
Revision identifier (R)
Revision description
‘-’
Initial device revision
‘A’
Second device revision
Field ‘YY’ states the year the device was manufactured. Field ‘WW’ states the week the
device was manufactured during that year.
LPC1759_58_56_54_52_51
Product data sheet
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Rev. 8.6 — 18 August 2015
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32-bit ARM Cortex-M3 microcontroller
6. Block diagram
JTAG
interface
EMULATION
TRACE MODULE
debug
port
RMII pins
LPC1759/58/56/54/52/51
TEST/DEBUG
INTERFACE
I-code
bus
MPU
ARM
CORTEX-M3
D-code
bus
DMA
CONTROLLER
system
bus
USB PHY
ETHERNET
CONTROLLER
WITH DMA(2)
master
XTAL1
XTAL2
RESET
USB pins
CLOCK
GENERATION,
POWER CONTROL,
SYSTEM
FUNCTIONS
USB HOST/
DEVICE/OTG
CONTROLLER
WITH DMA(4)
master
clocks and
controls
master
slave
ROM
slave
MULTILAYER AHB MATRIX
P0, P1,
P2, P4
slave
HIGH-SPEED
GPIO
SCK1
SSEL1
MISO1
MOSI1
RXD0/TXD0
8 × UART1
slave
AHB TO
APB
BRIDGE 0
APB slave group 0
SRAM
64/32/
16/8 kB
slave
slave
AHB TO
APB
BRIDGE 1
FLASH
512/256/128/64/32 kB
SSP0
UART2/3
UART0/1
CAN1/CAN2(1)
I2S(1)
I2C1
SCK/SSEL
MOSI/MISO
2 × MAT0/1
SPI0
TIMER 0/1
PWM1[6:1]
PCAP1[1:0]
WDT
TIMER2/3
4 × MAT2
2 × MAT3
PWM1
MOTOR CONTROL PWM
MCOA[2:0]
MCOB[2:0]
MCI[2:0]
QUADRATURE ENCODER
PHA, PHB
INDEX
12-bit ADC
AD0[7:2]
PIN CONNECT
RTCX1
RTCX2
VBAT
SCL2
SDA2
I2C2
1 × CAP0,
2 × CAP1
P0, P2
SCK0
SSEL0
MISO0
MOSI0
RXD2/3
TXD2/3
I2SRX_SDA
I2STX_CLK
I2STX_WS
I2STX_SDA
TX_MCLK
RX_MCLK
APB slave group 1
SSP1
RD1/2
TD1/2
SCL1
SDA1
FLASH
ACCELERATOR
GPIO INTERRUPT CONTROL
32 kHz
OSCILLATOR
RTC
AOUT
EXTERNAL INTERRUPTS
EINT0
RI TIMER
SYSTEM CONTROL
BACKUP REGISTERS
RTC POWER DOMAIN
DAC(3)
(1) LPC1759/58/56 only
(2) LPC1758 only
(3) LPC1759/58/56/54 only
(4) LPC1752/51 USB device only
002aae153
Grey-shaded blocks represent peripherals with connection to the GPDMA.
Fig 1.
Block diagram
LPC1759_58_56_54_52_51
Product data sheet
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32-bit ARM Cortex-M3 microcontroller
7. Pinning information
40
80
21
20
61
1
Fig 2.
41
60
7.1 Pinning
002aae158
Pin configuration LQFP80 package
7.2 Pin description
Table 4.
Pin description
Symbol
Pin
P0[0] to P0[31]
P0[0]/RD1/TXD3/
SDA1
P0[1]/TD1/RXD3/
SCL1
37[1]
38[1]
P0[2]/TXD0/AD0[7] 79[2]
P0[3]/RXD0/AD0[6]
P0[6]/
I2SRX_SDA/
SSEL1/MAT2[0]
LPC1759_58_56_54_52_51
Product data sheet
80[2]
64[1]
Type
Description
I/O
Port 0: Port 0 is a 32-bit I/O port with individual direction controls for each bit. The
operation of Port 0 pins depends upon the pin function selected via the pin
connect block. Some port pins are not available on the LQFP80 package.
I/O
P0[0] — General purpose digital input/output pin.
I
RD1 — CAN1 receiver input.
O
TXD3 — Transmitter output for UART3.
I/O
SDA1 — I2C1 data input/output (this is not an I2C-bus compliant open-drain pin).
I/O
P0[1] — General purpose digital input/output pin.
O
TD1 — CAN1 transmitter output.
I
RXD3 — Receiver input for UART3.
I/O
SCL1 — I2C1 clock input/output (this is not an I2C-bus compliant open-drain pin).
I/O
P0[2] — General purpose digital input/output pin.
O
TXD0 — Transmitter output for UART0.
I
AD0[7] — A/D converter 0, input 7.
I/O
P0[3] — General purpose digital input/output pin.
I
RXD0 — Receiver input for UART0.
I
AD0[6] — A/D converter 0, input 6.
I/O
P0[6] — General purpose digital input/output pin.
I/O
I2SRX_SDA — Receive data. It is driven by the transmitter and read by the
receiver. Corresponds to the signal SD in the I2S-bus specification.
(LPC1759/58/56 only).
I/O
SSEL1 — Slave Select for SSP1.
O
MAT2[0] — Match output for Timer 2, channel 0.
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32-bit ARM Cortex-M3 microcontroller
Table 4.
Pin description …continued
Symbol
Pin
Type
Description
P0[7]/I2STX_CLK/
SCK1/MAT2[1]
63[1]
I/O
P0[7] — General purpose digital input/output pin.
I/O
I2STX_CLK — Transmit Clock. It is driven by the master and received by the
slave. Corresponds to the signal SCK in the I2S-bus specification.
(LPC1759/58/56 only).
I/O
SCK1 — Serial Clock for SSP1.
O
MAT2[1] — Match output for Timer 2, channel 1.
I/O
P0[8] — General purpose digital input/output pin.
I/O
I2STX_WS — Transmit Word Select. It is driven by the master and received by the
slave. Corresponds to the signal WS in the I2S-bus specification. (LPC1759/58/56
only).
I/O
MISO1 — Master In Slave Out for SSP1.
P0[8]/I2STX_WS/
MISO1/MAT2[2]
P0[9]/I2STX_SDA/
MOSI1/MAT2[3]
P0[10]/TXD2/
SDA2/MAT3[0]
P0[11]/RXD2/
SCL2/MAT3[1]
P0[15]/TXD1/
SCK0/SCK
P0[16]/RXD1/
SSEL0/SSEL
P0[17]/CTS1/
MISO0/MISO
P0[18]/DCD1/
MOSI0/MOSI
LPC1759_58_56_54_52_51
Product data sheet
62[1]
61[1]
39[1]
40[1]
47[1]
48[1]
46[1]
45[1]
O
MAT2[2] — Match output for Timer 2, channel 2.
I/O
P0[9] — General purpose digital input/output pin.
I/O
I2STX_SDA — Transmit data. It is driven by the transmitter and read by the
receiver. Corresponds to the signal SD in the I2S-bus specification.
(LPC1759/58/56 only).
I/O
MOSI1 — Master Out Slave In for SSP1.
O
MAT2[3] — Match output for Timer 2, channel 3.
I/O
P0[10] — General purpose digital input/output pin.
O
TXD2 — Transmitter output for UART2.
I/O
SDA2 — I2C2 data input/output (this is not an open-drain pin).
O
MAT3[0] — Match output for Timer 3, channel 0.
I/O
P0[11] — General purpose digital input/output pin.
I
RXD2 — Receiver input for UART2.
I/O
SCL2 — I2C2 clock input/output (this is not an open-drain pin).
O
MAT3[1] — Match output for Timer 3, channel 1.
I/O
P0[15] — General purpose digital input/output pin.
O
TXD1 — Transmitter output for UART1.
I/O
SCK0 — Serial clock for SSP0.
I/O
SCK — Serial clock for SPI.
I/O
P0[16] — General purpose digital input/output pin.
I
RXD1 — Receiver input for UART1.
I/O
SSEL0 — Slave Select for SSP0.
I/O
SSEL — Slave Select for SPI.
I/O
P0[17] — General purpose digital input/output pin.
I
CTS1 — Clear to Send input for UART1.
I/O
MISO0 — Master In Slave Out for SSP0.
I/O
MISO — Master In Slave Out for SPI.
I/O
P0[18] — General purpose digital input/output pin.
I
DCD1 — Data Carrier Detect input for UART1.
I/O
MOSI0 — Master Out Slave In for SSP0.
I/O
MOSI — Master Out Slave In for SPI.
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32-bit ARM Cortex-M3 microcontroller
Table 4.
Pin description …continued
Symbol
Pin
Type
Description
P0[22]/RTS1/TD1
44[1]
I/O
P0[22] — General purpose digital input/output pin.
O
RTS1 — Request to Send output for UART1. Can also be configured to be an
RS-485/EIA-485 output enable signal.
O
TD1 — CAN1 transmitter output.
I/O
P0[25] — General purpose digital input/output pin.
I
AD0[2] — A/D converter 0, input 2.
I/O
I2SRX_SDA — Receive data. It is driven by the transmitter and read by the
receiver. Corresponds to the signal SD in the I2S-bus specification.
(LPC1759/58/56 only).
O
TXD3 — Transmitter output for UART3.
I/O
P0[26] — General purpose digital input/output pin.
I
AD0[3] — A/D converter 0, input 3.
O
AOUT — DAC output. (LPC1759/58/56/54 only).
I
RXD3 — Receiver input for UART3.
I/O
P0[29] — General purpose digital input/output pin.
I/O
USB_D+ — USB bidirectional D+ line.
I/O
P0[30] — General purpose digital input/output pin.
I/O
USB_D — USB bidirectional D line.
I/O
Port 1: Port 1 is a 32-bit I/O port with individual direction controls for each bit. The
operation of port 1 pins depends upon the pin function selected via the pin connect
block. Some port pins are not available on the LQFP80 package.
I/O
P1[0] — General purpose digital input/output pin.
O
ENET_TXD0 — Ethernet transmit data 0. (LPC1758 only).
I/O
P1[1] — General purpose digital input/output pin.
O
ENET_TXD1 — Ethernet transmit data 1. (LPC1758 only).
I/O
P1[4] — General purpose digital input/output pin.
O
ENET_TX_EN — Ethernet transmit data enable. (LPC1758 only).
I/O
P1[8] — General purpose digital input/output pin.
I
ENET_CRS — Ethernet carrier sense. (LPC1758 only).
I/O
P1[9] — General purpose digital input/output pin.
I
ENET_RXD0 — Ethernet receive data. (LPC1758 only).
P0[25]/AD0[2]/
I2SRX _SDA/
TXD3
7[2]
P0[26]/AD0[3]/
AOUT/RXD3
6[3]
P0[29]/USB_D+
22[4]
P0[30]/USB_D
23[4]
P1[0] to P1[31]
P1[0]/
ENET_TXD0
76[1]
P1[1]/
ENET_TXD1
75[1]
P1[4]/
ENET_TX_EN
74[1]
P1[8]/
ENET_CRS
73[1]
P1[9]/
ENET_RXD0
72[1]
P1[10]/
ENET_RXD1
71[1]
P1[14]/
ENET_RX_ER
70[1]
P1[15]/
ENET_REF_CLK
69[1]
LPC1759_58_56_54_52_51
Product data sheet
I/O
P1[10] — General purpose digital input/output pin.
I
ENET_RXD1 — Ethernet receive data. (LPC1758 only).
I/O
P1[14] — General purpose digital input/output pin.
I
ENET_RX_ER — Ethernet receive error. (LPC1758 only).
I/O
P1[15] — General purpose digital input/output pin.
I
ENET_REF_CLK — Ethernet reference clock. (LPC1758 only).
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32-bit ARM Cortex-M3 microcontroller
Table 4.
Pin description …continued
Symbol
Pin
Type
Description
P1[18]/
USB_UP_LED/
PWM1[1]/
CAP1[0]
25[1]
I/O
P1[18] — General purpose digital input/output pin.
O
USB_UP_LED — USB GoodLink LED indicator. It is LOW when the device is
configured (non-control endpoints enabled), or when the host is enabled and has
detected a device on the bus. It is HIGH when the device is not configured, or
when host is enabled and has not detected a device on the bus, or during global
suspend. It transitions between LOW and HIGH (flashes) when the host is enabled
and detects activity on the bus.
O
PWM1[1] — Pulse Width Modulator 1, channel 1 output.
I
CAP1[0] — Capture input for Timer 1, channel 0.
I/O
P1[19] — General purpose digital input/output pin.
O
MCOA0 — Motor control PWM channel 0, output A.
O
USB_PPWR — Port Power enable signal for USB port. (LPC1759/58/56/54 only).
I
CAP1[1] — Capture input for Timer 1, channel 1.
I/O
P1[20] — General purpose digital input/output pin.
I
MCI0 — Motor control PWM channel 0, input. Also Quadrature Encoder Interface
PHA input.
O
PWM1[2] — Pulse Width Modulator 1, channel 2 output.
I/O
SCK0 — Serial clock for SSP0.
I/O
P1[22] — General purpose digital input/output pin.
P1[19]/MCOA0/
USB_PPWR
CAP1[1]
P1[20]/MCI0/
PWM1[2]/SCK0
26[1]
27[1]
P1[22]/MCOB0/
USB_PWRD/
MAT1[0]
28[1]
P1[23]/MCI1/
PWM1[4]/MISO0
29[1]
P1[24]/MCI2/
PWM1[5]/MOSI0
30[1]
P1[25]/MCOA1/
MAT1[1]
31[1]
P1[26]/MCOB1/
PWM1[6]/CAP0[0]
32[1]
LPC1759_58_56_54_52_51
Product data sheet
O
MCOB0 — Motor control PWM channel 0, output B.
I
USB_PWRD — Power Status for USB port (host power switch).
(LPC1759/58/56/54 only).
O
MAT1[0] — Match output for Timer 1, channel 0.
I/O
P1[23] — General purpose digital input/output pin.
I
MCI1 — Motor control PWM channel 1, input. Also Quadrature Encoder Interface
PHB input.
O
PWM1[4] — Pulse Width Modulator 1, channel 4 output.
I/O
MISO0 — Master In Slave Out for SSP0.
I/O
P1[24] — General purpose digital input/output pin.
I
MCI2 — Motor control PWM channel 2, input. Also Quadrature Encoder Interface
INDEX input.
O
PWM1[5] — Pulse Width Modulator 1, channel 5 output.
I/O
MOSI0 — Master Out Slave in for SSP0.
I/O
P1[25] — General purpose digital input/output pin.
O
MCOA1 — Motor control PWM channel 1, output A.
O
MAT1[1] — Match output for Timer 1, channel 1.
I/O
P1[26] — General purpose digital input/output pin.
O
MCOB1 — Motor control PWM channel 1, output B.
O
PWM1[6] — Pulse Width Modulator 1, channel 6 output.
I
CAP0[0] — Capture input for Timer 0, channel 0.
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32-bit ARM Cortex-M3 microcontroller
Table 4.
Pin description …continued
Symbol
Pin
Type
Description
P1[28]/MCOA2/
PCAP1[0]/
MAT0[0]
35[1]
I/O
P1[28] — General purpose digital input/output pin.
O
MCOA2 — Motor control PWM channel 2, output A.
I
PCAP1[0] — Capture input for PWM1, channel 0.
O
MAT0[0] — Match output for Timer 0, channel 0.
P1[29]/MCOB2/
PCAP1[1]/
MAT0[1]
36[1]
I/O
P1[29] — General purpose digital input/output pin.
O
MCOB2 — Motor control PWM channel 2, output B.
I
PCAP1[1] — Capture input for PWM1, channel 1.
O
MAT0[1] — Match output for Timer 0, channel 1.
P1[30]/VBUS/
AD0[4]
18[2]
I/O
P1[30] — General purpose digital input/output pin.
I
VBUS — Monitors the presence of USB bus power.
Note: This signal must be HIGH for USB reset to occur.
P1[31]/SCK1/
AD0[5]
17[2]
P2[0] to P2[31]
P2[0]/PWM1[1]/
TXD1
60[1]
P2[1]/PWM1[2]/
RXD1
59[1]
P2[2]/PWM1[3]/
CTS1/
TRACEDATA[3]
P2[3]/PWM1[4]/
DCD1/
TRACEDATA[2]
P2[4]/PWM1[5]/
DSR1/
TRACEDATA[1]
P2[5]/PWM1[6]/
DTR1/
TRACEDATA[0]
LPC1759_58_56_54_52_51
Product data sheet
58[1]
55[1]
54[1]
53[1]
I
AD0[4] — A/D converter 0, input 4.
I/O
P1[31] — General purpose digital input/output pin.
I/O
SCK1 — Serial Clock for SSP1.
I
AD0[5] — A/D converter 0, input 5.
I/O
Port 2: Port 2 is a 32-bit I/O port with individual direction controls for each bit. The
operation of port 2 pins depends upon the pin function selected via the pin connect
block. Some port pins are not available on the LQFP80 package.
I/O
P2[0] — General purpose digital input/output pin.
O
PWM1[1] — Pulse Width Modulator 1, channel 1 output.
O
TXD1 — Transmitter output for UART1.
I/O
P2[1] — General purpose digital input/output pin.
O
PWM1[2] — Pulse Width Modulator 1, channel 2 output.
I
RXD1 — Receiver input for UART1.
I/O
P2[2] — General purpose digital input/output pin.
O
PWM1[3] — Pulse Width Modulator 1, channel 3 output.
I
CTS1 — Clear to Send input for UART1.
O
TRACEDATA[3] — Trace data, bit 3.
I/O
P2[3] — General purpose digital input/output pin.
O
PWM1[4] — Pulse Width Modulator 1, channel 4 output.
I
DCD1 — Data Carrier Detect input for UART1.
O
TRACEDATA[2] — Trace data, bit 2.
I/O
P2[4] — General purpose digital input/output pin.
O
PWM1[5] — Pulse Width Modulator 1, channel 5 output.
I
DSR1 — Data Set Ready input for UART1.
O
TRACEDATA[1] — Trace data, bit 1.
I/O
P2[5] — General purpose digital input/output pin.
O
PWM1[6] — Pulse Width Modulator 1, channel 6 output.
O
DTR1 — Data Terminal Ready output for UART1. Can also be configured to be an
RS-485/EIA-485 output enable signal.
O
TRACEDATA[0] — Trace data, bit 0.
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NXP Semiconductors
32-bit ARM Cortex-M3 microcontroller
Table 4.
Pin description …continued
Symbol
Pin
Type
Description
P2[6]/PCAP1[0]/
RI1/TRACECLK
52[1]
I/O
P2[6] — General purpose digital input/output pin.
I
PCAP1[0] — Capture input for PWM1, channel 0.
I
RI1 — Ring Indicator input for UART1.
O
TRACECLK — Trace Clock.
I/O
P2[7] — General purpose digital input/output pin.
I
RD2 — CAN2 receiver input. (LPC1759/58/56 only).
O
RTS1 — Request to Send output for UART1. Can also be configured to be an
RS-485/EIA-485 output enable signal.
I/O
P2[8] — General purpose digital input/output pin.
O
TD2 — CAN2 transmitter output. (LPC1759/58/56 only).
O
TXD2 — Transmitter output for UART2.
I/O
P2[9] — General purpose digital input/output pin.
O
USB_CONNECT — Signal used to switch an external 1.5 k resistor under
software control. Used with the SoftConnect USB feature.
I
RXD2 — Receiver input for UART2.
I/O
P2[10] — General purpose digital input/output pin. A LOW level on this pin during
reset starts the ISP command handler.
I
EINT0 — External interrupt 0 input.
I
NMI — Non-maskable interrupt input.
I/O
Port 4: Port 4 is a 32-bit I/O port with individual direction controls for each bit. The
operation of port 4 pins depends upon the pin function selected via the pin connect
block. Some port pins are not available on the LQFP80 package.
I/O
P4[28] — General purpose digital input/output pin.
O
RX_MCLK — I2S receive master clock. (LPC1759/58/56 only).
O
MAT2[0] — Match output for Timer 2, channel 0.
O
TXD3 — Transmitter output for UART3.
I/O
P4[29] — General purpose digital input/output pin.
O
TX_MCLK — I2S transmit master clock. (LPC1759/58/56 only).
O
MAT2[1] — Match output for Timer 2, channel 1.
I
RXD3 — Receiver input for UART3.
O
TDO — Test Data out for JTAG interface.
P2[7]/RD2/
RTS1
51[1]
P2[8]/TD2/
TXD2
50[1]
P2[9]/
USB_CONNECT/
RXD2
49[1]
P2[10]/EINT0/NMI
41[5]
P4[0] to P4[31]
P4[28]/RX_MCLK/
MAT2[0]/TXD3
P4[29]/TX_MCLK/
MAT2[1]/RXD3
65[1]
68[1]
TDO/SWO
1[6]
O
SWO — Serial wire trace output.
TDI
2[7]
I
TDI — Test Data in for JTAG interface.
TMS/SWDIO
3[7]
I
TMS — Test Mode Select for JTAG interface.
I/O
SWDIO — Serial wire debug data input/output.
TRST
4[7]
I
TRST — Test Reset for JTAG interface.
TCK/SWDCLK
5[6]
I
TCK — Test Clock for JTAG interface.
I
SWDCLK — Serial wire clock.
RSTOUT
11
O
RSTOUT — This is a 3.3 V pin. LOW on this pin indicates
LPC1759/58/56/54/52/51 being in Reset state.
RESET
14[8]
I
External reset input: A LOW-going pulse as short as 50 ns on this pin resets the
device, causing I/O ports and peripherals to take on their default states, and
processor execution to begin at address 0. TTL with hysteresis, 5 V tolerant.
LPC1759_58_56_54_52_51
Product data sheet
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32-bit ARM Cortex-M3 microcontroller
Table 4.
Pin description …continued
Symbol
Pin
Type
Description
XTAL1
19[9][10]
I
Input to the oscillator circuit and internal clock generator circuits.
XTAL2
20[9][10]
O
Output from the oscillator amplifier.
RTCX1
13[9][11]
I
Input to the RTC oscillator circuit.
RTCX2
15[9]
O
Output from the RTC oscillator circuit.
VSS
24, 33,
43, 57,
66, 78
I
ground: 0 V reference.
VSSA
9
I
analog ground: 0 V reference. This should nominally be the same voltage as VSS,
but should be isolated to minimize noise and error.
VDD(3V3)
21, 42,
56, 77
I
3.3 V supply voltage: This is the power supply voltage for the I/O ports.
VDD(REG)(3V3)
34, 67
I
3.3 V voltage regulator supply voltage: This is the supply voltage for the on-chip
voltage regulator only.
VDDA
8
I
analog 3.3 V pad supply voltage: This should be nominally the same voltage as
VDD(3V3) but should be isolated to minimize noise and error. This voltage is used to
power the ADC and DAC. This pin should be tied to 3.3 V if the ADC and DAC are
not used.
VREFP
10
I
ADC positive reference voltage: This should be nominally the same voltage as
VDDA but should be isolated to minimize noise and error. Level on this pin is used
as a reference for ADC and DAC. This pin should be tied to 3.3 V if the ADC and
DAC are not used.
VREFN
12
I
ADC negative reference voltage: This should be nominally the same voltage as
VSS but should be isolated to minimize noise and error. Level on this pin is used as
a reference for ADC and DAC.
VBAT
16[11]
I
RTC pin power supply: 3.3 V on this pin supplies the power to the RTC
peripheral.
[1]
5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis. This pin is pulled up to a voltage level of 2.3 V to 2.6 V.
[2]
5 V tolerant pad providing digital I/O functions (with TTL levels and hysteresis) and analog input. When configured as a ADC input,
digital section of the pad is disabled and the pin is not 5 V tolerant. This pin is pulled up to a voltage level of 2.3 V to 2.6 V.
[3]
5 V tolerant pad providing digital I/O with TTL levels and hysteresis and analog output function. When configured as the DAC output,
digital section of the pad is disabled. This pin is pulled up to a voltage level of 2.3 V to 2.6 V.
[4]
Pad provides digital I/O and USB functions. It is designed in accordance with the USB specification, revision 2.0 (Full-speed and
Low-speed mode only). This pad is not 5 V tolerant.
[5]
5 V tolerant pad with 10 ns glitch filter providing digital I/O functions with TTL levels and hysteresis. This pin is pulled up to a voltage
level of 2.3 V to 2.6 V.
[6]
5 V tolerant pad with TTL levels and hysteresis. Internal pull-up and pull-down resistors disabled.
[7]
5 V tolerant pad with TTL levels and hysteresis and internal pull-up resistor.
[8]
5 V tolerant pad with 20 ns glitch filter providing digital I/O function with TTL levels and hysteresis.
[9]
Pad provides special analog functionality. 32 kHz crystal oscillator must be used with the RTC.
[10] When the system oscillator is not used, connect XTAL1 and XTAL2 as follows: XTAL1 can be left floating or can be grounded (grounding
is preferred to reduce susceptibility to noise). XTAL2 should be left floating.
[11] When the RTC is not used, connect VBAT to VDD(REG)(3V3) and leave RTCX1 floating.
LPC1759_58_56_54_52_51
Product data sheet
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NXP Semiconductors
32-bit ARM Cortex-M3 microcontroller
8. Functional description
8.1 Architectural overview
The ARM Cortex-M3 includes three AHB-Lite buses: the system bus, the I-code bus, and
the D-code bus (see Figure 1). The I-code and D-code core buses are faster than the
system bus and are used similarly to Tightly Coupled Memory (TCM) interfaces: one bus
dedicated for instruction fetch (I-code) and one bus for data access (D-code). The use of
two core buses allows for simultaneous operations if concurrent operations target different
devices.
The LPC1759/58/56/54/52/51 use a multi-layer AHB matrix to connect the ARM
Cortex-M3 buses and other bus masters to peripherals in a flexible manner that optimizes
performance by allowing peripherals that are on different slaves ports of the matrix to be
accessed simultaneously by different bus masters.
8.2 ARM Cortex-M3 processor
The ARM Cortex-M3 is a general purpose, 32-bit microprocessor, which offers high
performance and very low power consumption. The ARM Cortex-M3 offers many new
features, including a Thumb-2 instruction set, low interrupt latency, hardware division,
hardware single-cycle multiply, interruptable/continuable multiple load and store
instructions, automatic state save and restore for interrupts, tightly integrated interrupt
controller with wakeup interrupt controller, and multiple core buses capable of
simultaneous accesses.
Pipeline techniques are employed so that all parts of the processing and memory systems
can operate continuously. Typically, while one instruction is being executed, its successor
is being decoded, and a third instruction is being fetched from memory.
The ARM Cortex-M3 processor is described in detail in the Cortex-M3 Technical
Reference Manual that can be found on official ARM website.
8.3 On-chip flash program memory
The LPC1759/58/56/54/52/51 contain up to 512 kB of on-chip flash memory. A new
two-port flash accelerator maximizes performance for use with the two fast AHB-Lite
buses.
8.4 On-chip SRAM
The LPC1759/58/56/54/52/51 contain a total of up to 64 kB on-chip static RAM memory.
This includes the main 32/16/8 kB SRAM, accessible by the CPU and DMA controller on a
higher-speed bus, and up to two additional 16 kB each SRAM blocks situated on a
separate slave port on the AHB multilayer matrix.
This architecture allows CPU and DMA accesses to be spread over three separate RAMs
that can be accessed simultaneously.
LPC1759_58_56_54_52_51
Product data sheet
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32-bit ARM Cortex-M3 microcontroller
8.5 Memory Protection Unit (MPU)
The LPC1759/58/56/54/52/51 have a Memory Protection Unit (MPU) which can be used
to improve the reliability of an embedded system by protecting critical data within the user
application.
The MPU allows separating processing tasks by disallowing access to each other's data,
disabling access to memory regions, allowing memory regions to be defined as read-only
and detecting unexpected memory accesses that could potentially break the system.
The MPU separates the memory into distinct regions and implements protection by
preventing disallowed accesses. The MPU supports up to 8 regions each of which can be
divided into 8 subregions. Accesses to memory locations that are not defined in the MPU
regions, or not permitted by the region setting, will cause the Memory Management Fault
exception to take place.
8.6 Memory map
The LPC1759/58/56/54/52/51 incorporate several distinct memory regions, shown in the
following figures. Figure 3 shows the overall map of the entire address space from the
user program viewpoint following reset. The interrupt vector area supports address
remapping.
The AHB peripheral area is 2 MB in size, and is divided to allow for up to 128 peripherals.
The APB peripheral area is 1 MB in size and is divided to allow for up to 64 peripherals.
Each peripheral of either type is allocated 16 kB of space. This allows simplifying the
address decoding for each peripheral.
LPC1759_58_56_54_52_51
Product data sheet
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15 of 80
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
0x400F C000
31
4 GB
system control
15
QEI
0x400B 8000
14
motor control PWM
0x400B 4000
13
reserved
LPC1759/58/56/54/52/51 memory space
0xFFFF FFFF
reserved
30 - 16 reserved
0x400C 0000
0x400B C000
private peripheral bus
11
reserved
AHB peripherals
0x400A 8000
10
I2S(1)
reserved
0x400A 4000
9
0x400A 0000
8
I2C2
0x4009 C000
7
UART3
reserved
0x4009 8000
6
UART2
APB1 peripherals
0x4009 4000
5
timer 3
0x4009 0000
4
timer 2
0x4008 C000
3
DAC(3)
0x4008 8000
2
SSP0
USB controller
2
reserved
1
GPDMA controller
0
Ethernet controller(2)
0x4400 0000
reserved
peripheral bit-band alias addressing
APB0 peripherals
0x4200 0000
0x4008 0000
0x4000 0000
0x2400 0000
AHB SRAM bit-band alias addressing
1 - 0 reserved
reserved
reserved
(1) LPC1759/58/56 only
(2) LPC1758 only
(3) LPC1759/58/56/54 only
16 kB AHB SRAM1 (LPC1759/8)
0.5 GB
16 kB AHB SRAM0 (LPC1759/8/6/4)
reserved
reserved
32 kB local static RAM (LPC1759/8)
16 kB local static RAM (LPC1756/4/2)
16 of 80
© NXP Semiconductors N.V. 2015. All rights reserved.
I-code/D-code
memory space
8 kB local static RAM (LPC1751)
reserved
512 kB on-chip flash (LPC1759/8)
256 kB on-chip flash (LPC1756)
128 kB on-chip flash (LPC1754)
+ 256 words
active interrupt vectors
LPC1759/58/56/54/52/51 memory map
0 GB
I2C1
22 - 19 reserved
18
0x5000 C000
CAN2(1)
0x5000 4000
0x5000 0000
0x4008 0000
0x4006 0000
0x4005 C000
0x4004 C000
0x4004 8000
17
CAN1
0x4004 4000
16
CAN common
0x4004 0000
15
CAN AF registers
0x4003 C000
0x2009 C000
14
CAN AF RAM
0x4003 8000
0x2008 4000
13
ADC
0x4003 4000
0x2008 0000
12
SSP1
0x4003 0000
0x2007 C000
11
pin connect
0x4002 C000
10
GPIO interrupts
0x4002 8000
9
RTC + backup registers
0x4002 4000
8
SPI
0x4002 0000
7
I2C0
0x4001 C000
0x1000 4000
6
PWM1
0x4001 8000
0x1000 2000
5
reserved
0x4001 4000
0x1000 0000
4
UART1
0x4001 0000
0x0008 0000
3
UART0
0x4000 C000
2
timer 1
0x4000 8000
1
0
timer 0
0x4000 4000
WDT
0x4000 0000
0x2200 0000
0x200A 0000
0x1FFF 2000
0x1FFF 0000
0x1000 8000
0x0004 0000
0x0002 0000
0x0001 0000
64 kB on-chip flash (LPC1752)
0x0000 8000
32 kB on-chip flash (LPC1751)
0x0000 0000
002aae154
32-bit ARM Cortex-M3 microcontroller
8 kB boot ROM
31 - 24 reserved
23
0x5001 0000
0x5000 8000
APB0 peripherals
0x4010 0000
reserved
GPIO
Fig 3.
0x5000 0000
3
0x5020 0000
LPC1759/58/56/54/52/51
Rev. 8.6 — 18 August 2015
All information provided in this document is subject to legal disclaimers.
0x400B 0000
0x0000 0000
0xE000 0000
0x5020 0000
0x400A C000
0x0000 0400
127- 4 reserved
reserved
12 repetitive interrupt timer
0x4008 0000
AHB peripherals
0xE010 0000
1 GB
NXP Semiconductors
LPC1759_58_56_54_52_51
Product data sheet
APB1 peripherals
0x4010 0000
LPC1759/58/56/54/52/51
NXP Semiconductors
32-bit ARM Cortex-M3 microcontroller
8.7 Nested Vectored Interrupt Controller (NVIC)
The NVIC is an integral part of the Cortex-M3. The tight coupling to the CPU allows for low
interrupt latency and efficient processing of late arriving interrupts.
8.7.1 Features
•
•
•
•
•
•
Controls system exceptions and peripheral interrupts
In the LPC1759/58/56/54/52/51, the NVIC supports 33 vectored interrupts
32 programmable interrupt priority levels, with hardware priority level masking
Relocatable vector table
Non-Maskable Interrupt (NMI)
Software interrupt generation
8.7.2 Interrupt sources
Each peripheral device has one interrupt line connected to the NVIC but may have several
interrupt flags. Individual interrupt flags may also represent more than one interrupt
source.
Any pin on Port 0 and Port 2 (total of 30 pins) regardless of the selected function, can be
programmed to generate an interrupt on a rising edge, a falling edge, or both.
8.8 Pin connect block
The pin connect block allows selected pins of the microcontroller to have more than one
function. Configuration registers control the multiplexers to allow connection between the
pin and the on-chip peripherals.
Peripherals should be connected to the appropriate pins prior to being activated and prior
to any related interrupt(s) being enabled. Activity of any enabled peripheral function that is
not mapped to a related pin should be considered undefined.
Most pins can also be configured as open-drain outputs or to have a pull-up, pull-down, or
no resistor enabled.
8.9 General purpose DMA controller
The GPDMA is an AMBA AHB compliant peripheral allowing selected
LPC1759/58/56/54/52/51 peripherals to have DMA support.
The GPDMA enables peripheral-to-memory, memory-to-peripheral,
peripheral-to-peripheral, and memory-to-memory transactions. The source and
destination areas can each be either a memory region or a peripheral, and can be
accessed through the AHB master. The GPDMA controller allows data transfers between
the USB and Ethernet (LPC1758 only) controllers and the various on-chip SRAM areas.
The supported APB peripherals are SSP0/1, all UARTs, the I2S-bus interface, the ADC,
and the DAC. Two match signals for each timer can be used to trigger DMA transfers.
Remark: Note that the DAC is not available on the LPC1752/51, and the I2S-bus interface
is not available on the LPC1754/52/51.
LPC1759_58_56_54_52_51
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32-bit ARM Cortex-M3 microcontroller
8.9.1 Features
• Eight DMA channels. Each channel can support an unidirectional transfer.
• 16 DMA request lines.
• Single DMA and burst DMA request signals. Each peripheral connected to the DMA
Controller can assert either a burst DMA request or a single DMA request. The DMA
burst size is set by programming the DMA Controller.
• Memory-to-memory, memory-to-peripheral, peripheral-to-memory, and
peripheral-to-peripheral transfers are supported.
• Scatter or gather DMA is supported through the use of linked lists. This means that
the source and destination areas do not have to occupy contiguous areas of memory.
• Hardware DMA channel priority.
• AHB slave DMA programming interface. The DMA Controller is programmed by
writing to the DMA control registers over the AHB slave interface.
• One AHB bus master for transferring data. The interface transfers data when a DMA
request goes active.
• 32-bit AHB master bus width.
• Incrementing or non-incrementing addressing for source and destination.
• Programmable DMA burst size. The DMA burst size can be programmed to more
efficiently transfer data.
• Internal four-word FIFO per channel.
• Supports 8, 16, and 32-bit wide transactions.
• Big-endian and little-endian support. The DMA Controller defaults to little-endian
mode on reset.
• An interrupt to the processor can be generated on a DMA completion or when a DMA
error has occurred.
• Raw interrupt status. The DMA error and DMA count raw interrupt status can be read
prior to masking.
8.10 Fast general purpose parallel I/O
Device pins that are not connected to a specific peripheral function are controlled by the
GPIO registers. Pins may be dynamically configured as inputs or outputs. Separate
registers allow setting or clearing any number of outputs simultaneously. The value of the
output register may be read back as well as the current state of the port pins.
LPC1759/58/56/54/52/51 use accelerated GPIO functions:
• GPIO registers are accessed through the AHB multilayer bus so that the fastest
possible I/O timing can be achieved.
• Mask registers allow treating sets of port bits as a group, leaving other bits
unchanged.
•
•
•
•
LPC1759_58_56_54_52_51
Product data sheet
All GPIO registers are byte and half-word addressable.
Entire port value can be written in one instruction.
Support for Cortex-M3 bit banding.
Support for use with the GPDMA controller.
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Additionally, any pin on Port 0 and Port 2 (total of 42 pins) providing a digital function can
be programmed to generate an interrupt on a rising edge, a falling edge, or both. The
edge detection is asynchronous, so it may operate when clocks are not present such as
during Power-down mode. Each enabled interrupt can be used to wake up the chip from
Power-down mode.
8.10.1 Features
• Bit level set and clear registers allow a single instruction to set or clear any number of
bits in one port.
• Direction control of individual bits.
• All I/O default to inputs after reset.
• Pull-up/pull-down resistor configuration and open-drain configuration can be
programmed through the pin connect block for each GPIO pin.
8.11 Ethernet (LPC1758 only)
The Ethernet block contains a full featured 10 Mbit/s or 100 Mbit/s Ethernet MAC
designed to provide optimized performance through the use of DMA hardware
acceleration. Features include a generous suite of control registers, half or full duplex
operation, flow control, control frames, hardware acceleration for transmit retry, receive
packet filtering and wake-up on LAN activity. Automatic frame transmission and reception
with scatter-gather DMA off-loads many operations from the CPU.
The Ethernet block and the CPU share the ARM Cortex-M3 D-code and system bus
through the AHB-multilayer matrix to access the various on-chip SRAM blocks for
Ethernet data, control, and status information.
The Ethernet block interfaces between an off-chip Ethernet PHY using the Reduced MII
(RMII) protocol and the on-chip Media Independent Interface Management (MIIM) serial
bus.
The Ethernet block supports bus clock rates of up to 100 MHz.
8.11.1 Features
• Ethernet standards support:
– Supports 10 Mbit/s or 100 Mbit/s PHY devices including 10 Base-T, 100 Base-TX,
100 Base-FX, and 100 Base-T4.
– Fully compliant with IEEE standard 802.3.
– Fully compliant with 802.3x full duplex flow control and half duplex back pressure.
– Flexible transmit and receive frame options.
– Virtual Local Area Network (VLAN) frame support.
• Memory management:
– Independent transmit and receive buffers memory mapped to shared SRAM.
– DMA managers with scatter/gather DMA and arrays of frame descriptors.
– Memory traffic optimized by buffering and pre-fetching.
• Enhanced Ethernet features:
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– Receive filtering.
– Multicast and broadcast frame support for both transmit and receive.
– Optional automatic Frame Check Sequence (FCS) insertion with Cyclic
Redundancy Check (CRC) for transmit.
– Selectable automatic transmit frame padding.
– Over-length frame support for both transmit and receive allows any length frames.
– Promiscuous receive mode.
– Automatic collision back-off and frame retransmission.
– Includes power management by clock switching.
– Wake-on-LAN power management support allows system wake-up: using the
receive filters or a magic frame detection filter.
• Physical interface:
– Attachment of external PHY chip through standard RMII interface.
– PHY register access is available via the MIIM interface.
8.12 USB interface
The Universal Serial Bus (USB) is a 4-wire bus that supports communication between a
host and one or more (up to 127) peripherals. The host controller allocates the USB
bandwidth to attached devices through a token-based protocol. The bus supports hot
plugging and dynamic configuration of the devices. All transactions are initiated by the
host controller.
The LPC1759/58/56/54 USB interface includes a device, Host, and OTG controller with
on-chip PHY for device and Host functions. The OTG switching protocol is supported
through the use of an external controller. Details on typical USB interfacing solutions can
be found in Section 15.1. The LPC1752/51 include a USB device controller only.
8.12.1 USB device controller
The device controller enables 12 Mbit/s data exchange with a USB Host controller. It
consists of a register interface, serial interface engine, endpoint buffer memory, and a
DMA controller. The serial interface engine decodes the USB data stream and writes data
to the appropriate endpoint buffer. The status of a completed USB transfer or error
condition is indicated via status registers. An interrupt is also generated if enabled. When
enabled, the DMA controller transfers data between the endpoint buffer and the on-chip
SRAM.
8.12.1.1
Features
•
•
•
•
•
Fully compliant with USB 2.0 specification (full speed).
Supports 32 physical (16 logical) endpoints with a 4 kB endpoint buffer RAM.
Supports Control, Bulk, Interrupt and Isochronous endpoints.
Scalable realization of endpoints at run time.
Endpoint Maximum packet size selection (up to USB maximum specification) by
software at run time.
• Supports SoftConnect and GoodLink features.
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• While USB is in the Suspend mode, the LPC1759/58/56/54/52/51 can enter one of the
reduced power modes and wake up on USB activity.
• Supports DMA transfers with all on-chip SRAM blocks on all non-control endpoints.
• Allows dynamic switching between CPU-controlled slave and DMA modes.
• Double buffer implementation for Bulk and Isochronous endpoints.
8.12.2 USB host controller (LPC1759/58/56/54 only).
The host controller enables full- and low-speed data exchange with USB devices attached
to the bus. It consists of a register interface, a serial interface engine, and a DMA
controller. The register interface complies with the Open Host Controller Interface (OHCI)
specification.
8.12.2.1
Features
• OHCI compliant.
• One downstream port.
• Supports port power switching.
8.12.3 USB OTG controller (LPC1759/58/56/54 only).
USB OTG is a supplement to the USB 2.0 specification that augments the capability of
existing mobile devices and USB peripherals by adding host functionality for connection to
USB peripherals.
The OTG Controller integrates the host controller, device controller, and a master-only
I2C-bus interface to implement OTG dual-role device functionality. The dedicated I2C-bus
interface controls an external OTG transceiver.
8.12.3.1
Features
• Fully compliant with On-The-Go supplement to the USB 2.0 Specification, Revision
1.0a.
• Hardware support for Host Negotiation Protocol (HNP).
• Includes a programmable timer required for HNP and Session Request Protocol
(SRP).
• Supports any OTG transceiver compliant with the OTG Transceiver Specification
(CEA-2011), Rev. 1.0.
8.13 CAN controller and acceptance filters
The Controller Area Network (CAN) is a serial communications protocol which efficiently
supports distributed real-time control with a very high level of security. Its domain of
application ranges from high-speed networks to low cost multiplex wiring.
The CAN block is intended to support multiple CAN buses simultaneously, allowing the
device to be used as a gateway, switch, or router among a number of CAN buses in
industrial or automotive applications.
Remark: LPC1754/52/51 have only one CAN bus.
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32-bit ARM Cortex-M3 microcontroller
8.13.1 Features
•
•
•
•
•
One or two CAN controllers and buses.
Data rates to 1 Mbit/s on each bus.
32-bit register and RAM access.
Compatible with CAN specification 2.0B, ISO 11898-1.
Global Acceptance Filter recognizes standard (11-bit) and extended-frame (29-bit)
receive identifiers for all CAN buses.
• Acceptance Filter can provide FullCAN-style automatic reception for selected
Standard Identifiers.
• FullCAN messages can generate interrupts.
8.14 12-bit ADC
The LPC1759/58/56/54/52/51 contain one ADC. It is a single 12-bit successive
approximation ADC with six channels and DMA support.
8.14.1 Features
•
•
•
•
•
•
•
•
•
•
12-bit successive approximation ADC.
Input multiplexing among 6 pins.
Power-down mode.
Measurement range VREFN to VREFP.
12-bit conversion rate: 200 kHz.
Individual channels can be selected for conversion.
Burst conversion mode for single or multiple inputs.
Optional conversion on transition of input pin or Timer Match signal.
Individual result registers for each ADC channel to reduce interrupt overhead.
DMA support.
8.15 10-bit DAC (LPC1759/58/56/54 only)
The DAC allows to generate a variable analog output. The maximum output value of the
DAC is VREFP.
8.15.1 Features
•
•
•
•
•
•
•
LPC1759_58_56_54_52_51
Product data sheet
10-bit DAC
Resistor string architecture
Buffered output
Power-down mode
Selectable output drive
Dedicated conversion timer
DMA support
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8.16 UARTs
The LPC1759/58/56/54/52/51 each contain four UARTs. In addition to standard transmit
and receive data lines, UART1 also provides a full modem control handshake interface
and support for RS-485/9-bit mode allowing both software address detection and
automatic address detection using 9-bit mode.
The UARTs include a fractional baud rate generator. Standard baud rates such as
115200 Bd can be achieved with any crystal frequency above 2 MHz.
8.16.1 Features
•
•
•
•
•
Maximum UART data bit rate of 6.25 Mbit/s.
16 B Receive and Transmit FIFOs.
Register locations conform to 16C550 industry standard.
Receiver FIFO trigger points at 1 B, 4 B, 8 B, and 14 B.
Built-in fractional baud rate generator covering wide range of baud rates without a
need for external crystals of particular values.
• Fractional divider for baud rate control, auto baud capabilities and FIFO control
mechanism that enables software flow control implementation.
• UART1 equipped with standard modem interface signals. This module also provides
full support for hardware flow control (auto-CTS/RTS).
• Support for RS-485/9-bit/EIA-485 mode (UART1).
• UART3 includes an IrDA mode to support infrared communication.
• All UARTs have DMA support.
8.17 SPI serial I/O controller
The LPC1759/58/56/54/52/51 contain one SPI controller. SPI is a full duplex serial
interface designed to handle multiple masters and slaves connected to a given bus. Only
a single master and a single slave can communicate on the interface during a given data
transfer. During a data transfer the master always sends 8 bits to 16 bits of data to the
slave, and the slave always sends 8 bits to 16 bits of data to the master.
8.17.1 Features
•
•
•
•
•
•
Maximum SPI data bit rate of 12.5 Mbit/s
Compliant with SPI specification
Synchronous, serial, full duplex communication
Combined SPI master and slave
Maximum data bit rate of one eighth of the input clock rate
8 bits to 16 bits per transfer
8.18 SSP serial I/O controller
The LPC1759/58/56/54/52/51 contain two SSP controllers. The SSP controller is capable
of operation on a SPI, 4-wire SSI, or Microwire bus. It can interact with multiple masters
and slaves on the bus. Only a single master and a single slave can communicate on the
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bus during a given data transfer. The SSP supports full duplex transfers, with frames of
4 bits to 16 bits of data flowing from the master to the slave and from the slave to the
master. In practice, often only one of these data flows carries meaningful data.
8.18.1 Features
• Maximum SSP speed of 33 Mbit/s (master) or 8 Mbit/s (slave)
• Compatible with Motorola SPI, 4-wire Texas Instruments SSI, and National
Semiconductor Microwire buses
•
•
•
•
•
Synchronous serial communication
Master or slave operation
8-frame FIFOs for both transmit and receive
4-bit to 16-bit frame
DMA transfers supported by GPDMA
8.19 I2C-bus serial I/O controllers
The LPC1759/58/56/54/52/51 each contain two I2C-bus controllers.
The I2C-bus is bidirectional for inter-IC control using only two wires: a Serial Clock Line
(SCL) and a Serial DAta line (SDA). Each device is recognized by a unique address and
can operate as either a receiver-only device (e.g., an LCD driver) or a transmitter with the
capability to both receive and send information (such as memory). Transmitters and/or
receivers can operate in either master or slave mode, depending on whether the chip has
to initiate a data transfer or is only addressed. The I2C is a multi-master bus and can be
controlled by more than one bus master connected to it.
8.19.1 Features
•
•
•
•
•
•
I2C1 and I2C2 use standard I/O pins with bit rates of up to 400 kbit/s (Fast I2C-bus).
Easy to configure as master, slave, or master/slave.
Programmable clocks allow versatile rate control.
Bidirectional data transfer between masters and slaves.
Multi-master bus (no central master).
Arbitration between simultaneously transmitting masters without corruption of serial
data on the bus.
• Serial clock synchronization allows devices with different bit rates to communicate via
one serial bus.
• Serial clock synchronization can be used as a handshake mechanism to suspend and
resume serial transfer.
• The I2C-bus can be used for test and diagnostic purposes.
• Both I2C-bus controllers support multiple address recognition and a bus monitor
mode.
8.20 I2S-bus serial I/O controllers (LPC1759/58/56 only)
The I2S-bus provides a standard communication interface for digital audio applications.
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The I2S-bus specification defines a 3-wire serial bus using one data line, one clock line,
and one word select signal. The basic I2S connection has one master, which is always the
master, and one slave. The I2S-bus interface provides a separate transmit and receive
channel, each of which can operate as either a master or a slave.
8.20.1 Features
• The interface has separate input/output channels each of which can operate in master
or slave mode.
• Capable of handling 8-bit, 16-bit, and 32-bit word sizes.
• Mono and stereo audio data supported.
• The sampling frequency can range from 16 kHz to 96 kHz (16, 22.05, 32, 44.1, 48,
96) kHz.
•
•
•
•
•
Support for an audio master clock.
Configurable word select period in master mode (separately for I2S input and output).
Two 8-word FIFO data buffers are provided, one for transmit and one for receive.
Generates interrupt requests when buffer levels cross a programmable boundary.
Two DMA requests, controlled by programmable buffer levels. These are connected
to the GPDMA block.
• Controls include reset, stop and mute options separately for I2S input and I2S output.
8.21 General purpose 32-bit timers/external event counters
The LPC1759/58/56/54/52/51 include four 32-bit timer/counters. The timer/counter is
designed to count cycles of the system derived clock or an externally-supplied clock. It
can optionally generate interrupts, generate timed DMA requests, or perform other actions
at specified timer values, based on four match registers. Each timer/counter also includes
two capture inputs to trap the timer value when an input signal transitions, optionally
generating an interrupt.
8.21.1 Features
• A 32-bit timer/counter with a programmable 32-bit prescaler.
• Counter or timer operation.
• One 32-bit capture channel for timer 0 and two capture channels for timer 1. The
capture channels can take a snapshot of the timer value when an input signal
transitions. A capture event may also generate an interrupt.
• Four 32-bit match registers that allow:
– Continuous operation with optional interrupt generation on match.
– Stop timer on match with optional interrupt generation.
– Reset timer on match with optional interrupt generation.
• Up to four external outputs corresponding to match registers, with the following
capabilities:
– Set LOW on match.
– Set HIGH on match.
– Toggle on match.
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– Do nothing on match.
• Up to two match registers can be used to generate timed DMA requests.
8.22 Pulse width modulator
The PWM is based on the standard Timer block and inherits all of its features, although
only the PWM function is pinned out on the LPC1759/58/56/54/52/51. The Timer is
designed to count cycles of the system derived clock and optionally switch pins, generate
interrupts or perform other actions when specified timer values occur, based on seven
match registers. The PWM function is in addition to these features, and is based on match
register events.
The ability to separately control rising and falling edge locations allows the PWM to be
used for more applications. For instance, multi-phase motor control typically requires
three non-overlapping PWM outputs with individual control of all three pulse widths and
positions.
Two match registers can be used to provide a single edge controlled PWM output. One
match register (PWMMR0) controls the PWM cycle rate, by resetting the count upon
match. The other match register controls the PWM edge position. Additional single edge
controlled PWM outputs require only one match register each, since the repetition rate is
the same for all PWM outputs. Multiple single edge controlled PWM outputs will all have a
rising edge at the beginning of each PWM cycle, when an PWMMR0 match occurs.
Three match registers can be used to provide a PWM output with both edges controlled.
Again, the PWMMR0 match register controls the PWM cycle rate. The other match
registers control the two PWM edge positions. Additional double edge controlled PWM
outputs require only two match registers each, since the repetition rate is the same for all
PWM outputs.
With double edge controlled PWM outputs, specific match registers control the rising and
falling edge of the output. This allows both positive going PWM pulses (when the rising
edge occurs prior to the falling edge), and negative going PWM pulses (when the falling
edge occurs prior to the rising edge).
8.22.1 Features
• LPC1759/58/56/54/52/51 has one PWM block with Counter or Timer operation (may
use the peripheral clock or one of the capture inputs as the clock source).
• Seven match registers allow up to 6 single edge controlled or 3 double edge
controlled PWM outputs, or a mix of both types. The match registers also allow:
– Continuous operation with optional interrupt generation on match.
– Stop timer on match with optional interrupt generation.
– Reset timer on match with optional interrupt generation.
• Supports single edge controlled and/or double edge controlled PWM outputs. Single
edge controlled PWM outputs all go high at the beginning of each cycle unless the
output is a constant low. Double edge controlled PWM outputs can have either edge
occur at any position within a cycle. This allows for both positive going and negative
going pulses.
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• Pulse period and width can be any number of timer counts. This allows complete
flexibility in the trade-off between resolution and repetition rate. All PWM outputs will
occur at the same repetition rate.
• Double edge controlled PWM outputs can be programmed to be either positive going
or negative going pulses.
• Match register updates are synchronized with pulse outputs to prevent generation of
erroneous pulses. Software must ‘release’ new match values before they can become
effective.
• May be used as a standard 32-bit timer/counter with a programmable 32-bit prescaler
if the PWM mode is not enabled.
8.23 Motor control PWM
The motor control PWM is a specialized PWM supporting 3-phase motors and other
combinations. Feedback inputs are provided to automatically sense rotor position and use
that information to ramp speed up or down. At the same time, the motor control PWM is
highly configurable for other generalized timing, counting, capture, and compare
applications.
8.24 Quadrature Encoder Interface (QEI)
A quadrature encoder, also known as a 2-channel incremental encoder, converts angular
displacement into two pulse signals. By monitoring both the number of pulses and the
relative phase of the two signals, the user can track the position, direction of rotation, and
velocity. In addition, a third channel, or index signal, can be used to reset the position
counter. The quadrature encoder interface decodes the digital pulses from a quadrature
encoder wheel to integrate position over time and determine direction of rotation. In
addition, the QEI can capture the velocity of the encoder wheel.
8.24.1 Features
•
•
•
•
•
•
•
•
•
•
Tracks encoder position.
Increments/decrements depending on direction.
Programmable for 2 or 4 position counting.
Velocity capture using built-in timer.
Velocity compare function with “less than” interrupt.
Uses 32-bit registers for position and velocity.
Three position compare registers with interrupts.
Index counter for revolution counting.
Index compare register with interrupts.
Can combine index and position interrupts to produce an interrupt for whole and
partial revolution displacement.
• Digital filter with programmable delays for encoder input signals.
• Can accept decoded signal inputs (clk and direction).
• Connected to APB.
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8.25 Repetitive Interrupt (RI) timer
The repetitive interrupt timer provides a free-running 32-bit counter which is compared to
a selectable value, generating an interrupt when a match occurs. Any bits of the
timer/compare can be masked such that they do not contribute to the match detection.
The repetitive interrupt timer can be used to create an interrupt that repeats at
predetermined intervals.
8.25.1 Features
• 32-bit counter running from PCLK. Counter can be free-running or be reset by a
generated interrupt.
• 32-bit compare value.
• 32-bit compare mask. An interrupt is generated when the counter value equals the
compare value, after masking. This allows for combinations not possible with a simple
compare.
8.26 ARM Cortex-M3 system tick timer
The ARM Cortex-M3 includes a system tick timer (SYSTICK) that is intended to generate
a dedicated SYSTICK exception at a 10 ms interval. In the LPC1759/58/56/54/52/51, this
timer can be clocked from the internal AHB clock or from a device pin.
8.27 Watchdog timer
The purpose of the watchdog is to reset the microcontroller within a reasonable amount of
time if it enters an erroneous state. When enabled, the watchdog will generate a system
reset if the user program fails to ‘feed’ (or reload) the watchdog within a predetermined
amount of time.
8.27.1 Features
• Internally resets chip if not periodically reloaded.
• Debug mode.
• Enabled by software but requires a hardware reset or a watchdog reset/interrupt to be
disabled.
•
•
•
•
Incorrect/Incomplete feed sequence causes reset/interrupt if enabled.
Flag to indicate watchdog reset.
Programmable 32-bit timer with internal prescaler.
Selectable time period from (Tcy(WDCLK) 256 4) to (Tcy(WDCLK) 232 4) in
multiples of Tcy(WDCLK) 4.
• The Watchdog Clock (WDCLK) source can be selected from the Internal RC (IRC)
oscillator, the RTC oscillator, or the APB peripheral clock. This gives a wide range of
potential timing choices of Watchdog operation under different power reduction
conditions. It also provides the ability to run the WDT from an entirely internal source
that is not dependent on an external crystal and its associated components and wiring
for increased reliability.
• Includes lock/safe feature.
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8.28 RTC and backup registers
The RTC is a set of counters for measuring time when system power is on, and optionally
when it is off. The RTC on the LPC1759/58/56/54/52/51 is designed to have extremely low
power consumption, i.e. less than 1 A. The RTC will typically run from the main chip
power supply, conserving battery power while the rest of the device is powered up. When
operating from a battery, the RTC will continue working down to 2.1 V. Battery power can
be provided from a standard 3 V Lithium button cell.
An ultra-low power 32 kHz oscillator will provide a 1 Hz clock to the time counting portion
of the RTC, moving most of the power consumption out of the time counting function.
The RTC includes a calibration mechanism to allow fine-tuning the count rate in a way
that will provide less than 1 second per day error when operated at a constant voltage and
temperature.
The RTC contains a small set of backup registers (20 bytes) for holding data while the
main part of the LPC1759/58/56/54/52/51 is powered off.
The RTC includes an alarm function that can wake up the LPC1759/58/56/54/52/51 from
all reduced power modes with a time resolution of 1 s.
8.28.1 Features
• Measures the passage of time to maintain a calendar and clock.
• Ultra low power design to support battery powered systems.
• Provides Seconds, Minutes, Hours, Day of Month, Month, Year, Day of Week, and
Day of Year.
•
•
•
•
Dedicated power supply pin can be connected to a battery or to the main 3.3 V.
Periodic interrupts can be generated from increments of any field of the time registers.
Backup registers (20 bytes) powered by VBAT.
RTC power supply is isolated from the rest of the chip.
8.29 Clocking and power control
8.29.1 Crystal oscillators
The LPC1759/58/56/54/52/51 include three independent oscillators. These are the main
oscillator, the IRC oscillator, and the RTC oscillator. Each oscillator can be used for more
than one purpose as required in a particular application. Any of the three clock sources
can be chosen by software to drive the main PLL and ultimately the CPU.
Following reset, the LPC1759/58/56/54/52/51 will operate from the Internal RC oscillator
until switched by software. This allows systems to operate without any external crystal and
the bootloader code to operate at a known frequency.
See Figure 4 for an overview of the LPC1759/58/56/54/52/51 clock generation.
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LPC17xx
usbclk
(48 MHz)
USB PLL
MAIN
OSCILLATOR
USB
CLOCK
DIVIDER
MAIN PLL
pllclk
system
clock
select
(CLKSRCSEL)
INTERNAL
RC
OSCILLATOR
USB BLOCK
USB clock config USB PLL enable
(USBCLKCFG)
cclk
CPU
CLOCK
DIVIDER
main PLL enable
CPU clock config
(CCLKCFG)
ARM
CORTEX-M3
ETHERNET
BLOCK
DMA
GPIO
NVIC
WATCHDOG
TIMER
CCLK/8
32 kHz
RTC
OSCILLATOR
PERIPHERAL
CLOCK
GENERATOR
pclkWDT
rtclk = 1Hz
REAL-TIME
CLOCK
CCLK/6
CCLK/4
CCLK/2
APB peripherals
CCLK
002aad947
Fig 4.
LPC1759/58/56/54/52/51 clocking generation block diagram
8.29.1.1
Internal RC oscillator
The IRC may be used as the clock source for the WDT, and/or as the clock that drives the
PLL and subsequently the CPU. The nominal IRC frequency is 4 MHz. The IRC is
trimmed to 1 % accuracy over the entire voltage and temperature range.
Upon power-up or any chip reset, the LPC1759/58/56/54/52/51 use the IRC as the clock
source. Software may later switch to one of the other available clock sources.
8.29.1.2
Main oscillator
The main oscillator can be used as the clock source for the CPU, with or without using the
PLL. The main oscillator also provides the clock source for the dedicated USB PLL.
The main oscillator operates at frequencies of 1 MHz to 25 MHz. This frequency can be
boosted to a higher frequency, up to the maximum CPU operating frequency, by the main
PLL. The clock selected as the PLL input is PLLCLKIN. The ARM processor clock
frequency is referred to as CCLK elsewhere in this document. The frequencies of
PLLCLKIN and CCLK are the same value unless the PLL is active and connected. The
clock frequency for each peripheral can be selected individually and is referred to as
PCLK. Refer to Section 8.29.2 for additional information.
8.29.1.3
RTC oscillator
The RTC oscillator can be used as the clock source for the RTC block, the main PLL,
and/or the CPU.
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8.29.2 Main PLL (PLL0)
The PLL0 accepts an input clock frequency in the range of 32 kHz to 25 MHz. The input
frequency is multiplied up to a high frequency, then divided down to provide the actual
clock used by the CPU and/or the USB block.
The PLL0 input, in the range of 32 kHz to 25 MHz, may initially be divided down by a
value ‘N’, which may be in the range of 1 to 256. This input division provides a wide range
of output frequencies from the same input frequency.
Following the PLL0 input divider is the PLL0 multiplier. This can multiply the input divider
output through the use of a Current Controlled Oscillator (CCO) by a value ‘M’, in the
range of 1 through 32768. The resulting frequency must be in the range of 275 MHz to
550 MHz. The multiplier works by dividing the CCO output by the value of M, then using a
phase-frequency detector to compare the divided CCO output to the multiplier input. The
error value is used to adjust the CCO frequency.
The PLL0 is turned off and bypassed following a chip Reset and by entering Power-down
mode. PLL0 is enabled by software only. The program must configure and activate the
PLL0, wait for the PLL0 to lock, and then connect to the PLL0 as a clock source.
8.29.3 USB PLL (PLL1)
The LPC1759/58/56/54/52/51 contain a second, dedicated USB PLL1 to provide clocking
for the USB interface.
The PLL1 receives its clock input from the main oscillator only and provides a fixed
48 MHz clock to the USB block only. The PLL1 is disabled and powered off on reset. If the
PLL1 is left disabled, the USB clock will be supplied by the 48 MHz clock from the main
PLL0.
The PLL1 accepts an input clock frequency in the range of 10 MHz to 25 MHz only. The
input frequency is multiplied up the range of 48 MHz for the USB clock using a Current
Controlled Oscillators (CCO). It is insured that the PLL1 output has a 50 % duty cycle.
8.29.4 Wake-up timer
The LPC1759/58/56/54/52/51 begin operation at power-up and when awakened from
Power-down mode by using the 4 MHz IRC oscillator as the clock source. This allows chip
operation to resume quickly. If the main oscillator or the PLL is needed by the application,
software will need to enable these features and wait for them to stabilize before they are
used as a clock source.
When the main oscillator is initially activated, the wake-up timer allows software to ensure
that the main oscillator is fully functional before the processor uses it as a clock source
and starts to execute instructions. This is important at power on, all types of Reset, and
whenever any of the aforementioned functions are turned off for any reason. Since the
oscillator and other functions are turned off during Power-down mode, any wake-up of the
processor from Power-down mode makes use of the wake-up Timer.
The Wake-up Timer monitors the crystal oscillator to check whether it is safe to begin
code execution. When power is applied to the chip, or when some event caused the chip
to exit Power-down mode, some time is required for the oscillator to produce a signal of
sufficient amplitude to drive the clock logic. The amount of time depends on many factors,
including the rate of VDD(3V3) ramp (in the case of power on), the type of crystal and its
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electrical characteristics (if a quartz crystal is used), as well as any other external circuitry
(e.g., capacitors), and the characteristics of the oscillator itself under the existing ambient
conditions.
8.29.5 Power control
The LPC1759/58/56/54/52/51 support a variety of power control features. There are four
special modes of processor power reduction: Sleep mode, Deep-sleep mode,
Power-down mode, and Deep power-down mode. The CPU clock rate may also be
controlled as needed by changing clock sources, reconfiguring PLL values, and/or altering
the CPU clock divider value. This allows a trade-off of power versus processing speed
based on application requirements. In addition, Peripheral Power Control allows shutting
down the clocks to individual on-chip peripherals, allowing fine tuning of power
consumption by eliminating all dynamic power use in any peripherals that are not required
for the application. Each of the peripherals has its own clock divider which provides even
better power control.
Integrated PMU (Power Management Unit) automatically adjust internal regulators to
minimize power consumption during Sleep, Deep sleep, Power-down, and Deep
power-down modes.
The LPC1759/58/56/54/52/51 also implement a separate power domain to allow turning
off power to the bulk of the device while maintaining operation of the RTC and a small set
of registers for storing data during any of the power-down modes.
8.29.5.1
Sleep mode
When Sleep mode is entered, the clock to the core is stopped. Resumption from the Sleep
mode does not need any special sequence but re-enabling the clock to the ARM core.
In Sleep mode, execution of instructions is suspended until either a Reset or interrupt
occurs. Peripheral functions continue operation during Sleep mode and may generate
interrupts to cause the processor to resume execution. Sleep mode eliminates dynamic
power used by the processor itself, memory systems and related controllers, and internal
buses.
8.29.5.2
Deep-sleep mode
In Deep-sleep mode, the oscillator is shut down and the chip receives no internal clocks.
The processor state and registers, peripheral registers, and internal SRAM values are
preserved throughout Deep-sleep mode and the logic levels of chip pins remain static.
The output of the IRC is disabled but the IRC is not powered down for a fast wake-up later.
The RTC oscillator is not stopped because the RTC interrupts may be used as the
wake-up source. The PLL is automatically turned off and disconnected. The CCLK and
USB clock dividers automatically get reset to zero.
The Deep-sleep mode can be terminated and normal operation resumed by either a
Reset or certain specific interrupts that are able to function without clocks. Since all
dynamic operation of the chip is suspended, Deep-sleep mode reduces chip power
consumption to a very low value. Power to the flash memory is left on in Deep-sleep
mode, allowing a very quick wake-up.
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On wake-up from Deep-sleep mode, the code execution and peripherals activities will
resume after 4 cycles expire if the IRC was used before entering Deep-sleep mode. If the
main external oscillator was used, the code execution will resume when 4096 cycles
expire. PLL and clock dividers need to be reconfigured accordingly.
8.29.5.3
Power-down mode
Power-down mode does everything that Deep-sleep mode does, but also turns off the
power to the IRC oscillator and the flash memory. This saves more power but requires
waiting for resumption of flash operation before execution of code or data access in the
flash memory can be accomplished.
On the wake-up of Power-down mode, if the IRC was used before entering Power-down
mode, it will take IRC 60 s to start-up. After this 4 IRC cycles will expire before the code
execution can then be resumed if the code was running from SRAM. In the meantime, the
flash wake-up timer then counts 4 MHz IRC clock cycles to make the 100 s flash start-up
time. When it times out, access to the flash will be allowed. Users need to reconfigure the
PLL and clock dividers accordingly.
8.29.5.4
Deep power-down mode
The Deep power-down mode can only be entered from the RTC block. In Deep
power-down mode, power is shut off to the entire chip with the exception of the RTC
module and the RESET pin.
The LPC1759/58/56/54/52/51 can wake up from Deep power-down mode via the RESET
pin or an alarm match event of the RTC.
8.29.5.5
Wakeup interrupt controller
The Wakeup Interrupt Controller (WIC) allows the CPU to automatically wake up from any
enabled priority interrupt that can occur while the clocks are stopped in Deep sleep,
Power-down, and Deep power-down modes.
The Wakeup Interrupt Controller (WIC) works in connection with the Nested Vectored
Interrupt Controller (NVIC). When the CPU enters Deep sleep, Power-down, or Deep
power-down mode, the NVIC sends a mask of the current interrupt situation to the
WIC.This mask includes all of the interrupts that are both enabled and of sufficient priority
to be serviced immediately. With this information, the WIC simply notices when one of the
interrupts has occurred and then it wakes up the CPU.
The Wakeup Interrupt Controller (WIC) eliminates the need to periodically wake up the
CPU and poll the interrupts resulting in additional power savings.
8.29.6 Peripheral power control
A power control for peripherals feature allows individual peripherals to be turned off if they
are not needed in the application, resulting in additional power savings.
8.29.7 Power domains
The LPC1759/58/56/54/52/51 provide two independent power domains that allow the bulk
of the device to have power removed while maintaining operation of the RTC and the
backup Registers.
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On the LPC1759/58/56/54/52/51, I/O pads are powered by the 3.3 V (VDD(3V3)) pins, while
the VDD(REG)(3V3) pin powers the on-chip voltage regulator which in turn provides power to
the CPU and most of the peripherals.
Depending on the LPC1759/58/56/54/52/51 application, a design can use two power
options to manage power consumption.
The first option assumes that power consumption is not a concern and the design ties the
VDD(3V3) and VDD(REG)(3V3) pins together. This approach requires only one 3.3 V power
supply for both pads, the CPU, and peripherals. While this solution is simple, it does not
support powering down the I/O pad ring “on the fly” while keeping the CPU and
peripherals alive.
The second option uses two power supplies; a 3.3 V supply for the I/O pads (VDD(3V3)) and
a dedicated 3.3 V supply for the CPU (VDD(REG)(3V3)). Having the on-chip voltage regulator
powered independently from the I/O pad ring enables shutting down of the I/O pad power
supply “on the fly”, while the CPU and peripherals stay active.
The VBAT pin supplies power only to the RTC domain. The RTC requires a minimum of
power to operate, which can be supplied by an external battery. The device core power
(VDD(REG)(3V3)) is used to operate the RTC whenever VDD(REG)(3V3) is present. Therefore,
there is no power drain from the RTC battery when VDD(REG)(3V3) is available.
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LPC17xx
VDD(3V3)
to I/O pads
to core
VSS
REGULATOR
to memories,
peripherals,
oscillators,
PLLs
VDD(REG)(3V3)
MAIN POWER DOMAIN
VBAT
POWER
SELECTOR
ULTRA LOW-POWER
REGULATOR
BACKUP REGISTERS
RTCX1
RTCX2
32 kHz
OSCILLATOR
REAL-TIME CLOCK
RTC POWER DOMAIN
DAC
VDDA
VREFP
ADC
VREFN
VSSA
ADC POWER DOMAIN
002aad978
Fig 5.
Power distribution
8.30 System control
8.30.1 Reset
Reset has four sources on the LPC17xx: the RESET pin, the Watchdog reset, power-on
reset (POR), and the BrownOut Detection (BOD) circuit. The RESET pin is a Schmitt
trigger input pin. Assertion of chip Reset by any source, once the operating voltage attains
a usable level, causes the RSTOUT pin to go LOW and starts the wake-up timer (see
description in Section 8.29.4). The wake-up timer ensures that reset remains asserted
until the external Reset is de-asserted, the oscillator is running, a fixed number of clocks
have passed, and the flash controller has completed its initialization. Once reset is
de-asserted, or, in case of a BOD-triggered reset, once the voltage rises above the BOD
threshold, the RSTOUT pin goes HIGH.
When the internal Reset is removed, the processor begins executing at address 0, which
is initially the Reset vector mapped from the boot block. At that point, all of the processor
and peripheral registers have been initialized to predetermined values.
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8.30.2 Brownout detection
The LPC1759/58/56/54/52/51 include 2-stage monitoring of the voltage on the
VDD(REG)(3V3) pins. If this voltage falls below 2.2 V, the BOD asserts an interrupt signal to
the Vectored Interrupt Controller. This signal can be enabled for interrupt in the Interrupt
Enable Register in the NVIC in order to cause a CPU interrupt; if not, software can monitor
the signal by reading a dedicated status register.
The second stage of low-voltage detection asserts reset to inactivate the
LPC1759/58/56/54/52/51 when the voltage on the VDD(REG)(3V3) pins falls below 1.85 V.
This reset prevents alteration of the flash as operation of the various elements of the chip
would otherwise become unreliable due to low voltage. The BOD circuit maintains this
reset down below 1 V, at which point the power-on reset circuitry maintains the overall
reset.
Both the 2.2 V and 1.85 V thresholds include some hysteresis. In normal operation, this
hysteresis allows the 2.2 V detection to reliably interrupt, or a regularly executed event
loop to sense the condition.
8.30.3 Code security (Code Read Protection - CRP)1
This feature of the LPC1759/58/56/54/52/51 allows user to enable different levels of
security in the system so that access to the on-chip flash and use of the JTAG and ISP
can be restricted. When needed, CRP is invoked by programming a specific pattern into a
dedicated flash location. IAP commands are not affected by the CRP.
There are three levels of the Code Read Protection.
CRP1 disables access to chip via the JTAG and allows partial flash update (excluding
flash sector 0) using a limited set of the ISP commands. This mode is useful when CRP is
required and flash field updates are needed but all sectors can not be erased.
CRP2 disables access to chip via the JTAG and only allows full flash erase and update
using a reduced set of the ISP commands.
Running an application with level CRP3 selected fully disables any access to chip via the
JTAG pins and the ISP. This mode effectively disables ISP override using P2[10] pin, too.
It is up to the user’s application to provide (if needed) flash update mechanism using IAP
calls or call reinvoke ISP command to enable flash update via UART0.
CAUTION
If level three Code Read Protection (CRP3) is selected, no future factory testing can be
performed on the device.
8.30.4 APB interface
The APB peripherals are split into two separate APB buses in order to distribute the bus
bandwidth and thereby reducing stalls caused by contention between the CPU and the
GPDMA controller.
1.
LPC1751FBD80 with device ID 25001110 does not support CRP feature. LPC1751FBD80 with device ID 25001118 does support
CRP. See errata note in ES_LPC1751.
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8.30.5 AHB multilayer matrix
The LPC1759/58/56/54/52/51 use an AHB multilayer matrix. This matrix connects the
instruction (I-code) and data (D-code) CPU buses of the ARM Cortex-M3 to the flash
memory, the main (32 kB) static RAM, and the Boot ROM. The GPDMA can also access
all of these memories. The peripheral DMA controllers, Ethernet (LPC1758 only) and
USB, can access all SRAM blocks. Additionally, the matrix connects the CPU system bus
and all of the DMA controllers to the various peripheral functions.
8.30.6 External interrupt inputs
The LPC1759/58/56/54/52/51 include up to 30 edge sensitive interrupt inputs combined
with one level sensitive external interrupt input as selectable pin function. The external
interrupt input can optionally be used to wake up the processor from Power-down mode.
8.30.7 Memory mapping control
The Cortex-M3 incorporates a mechanism that allows remapping the interrupt vector table
to alternate locations in the memory map. This is controlled via the Vector Table Offset
Register contained in the NVIC.
The vector table may be located anywhere within the bottom 1 GB of Cortex-M3 address
space. The vector table must be located on a 128 word (512 byte) boundary because the
NVIC on the LPC1759/58/56/54/52/51 is configured for 128 total interrupts.
8.31 Emulation and debugging
Debug and trace functions are integrated into the ARM Cortex-M3. Serial wire debug and
trace functions are supported in addition to a standard JTAG debug and parallel trace
functions. The ARM Cortex-M3 is configured to support up to eight breakpoints and four
watch points.
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9. Limiting values
Table 5.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).[1]
Symbol
VDD(3V3)
Parameter
Conditions
supply voltage (3.3 V)
external rail
Min
Max
Unit
[2]
0.5
+4.6
V
VDD(REG)(3V3)
regulator supply voltage (3.3 V)
[2]
0.5
+4.6
V
VDDA
analog 3.3 V pad supply
voltage
[2]
0.5
+4.6
V
Vi(VBAT)
input voltage on pin VBAT
[2]
0.5
+4.6
V
[2]
0.5
+4.6
V
on ADC related pins
[2][3]
0.5
+5.1
V
[2][4]
0.5
+5.5
V
Vi(VREFP)
input voltage on pin VREFP
VIA
analog input voltage
for the RTC
VI
input voltage
5 V tolerant digital I/O pins;
VDD 2.4 V
VDD = 0 V
0.5
+3.6
IDD
supply current
per supply pin
-
100
mA
ISS
ground current
per ground pin
-
100
mA
Ilatch
I/O latch-up current
(0.5VDD(3V3)) < VI <
(1.5VDD(3V3)); Tj < 125 C
-
100
mA
Tstg
storage temperature
65
+150
C
Tj(max)
maximum junction temperature
150
C
Ptot(pack)
total power dissipation (per
package)
based on package heat
transfer, not device power
consumption
-
1.5
W
VESD
electrostatic discharge voltage
human body model; all pins
4000
+4000
V
[1]
[5]
[6]
The following applies to the limiting values:
a) This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive
static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated
maximum.
b) Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless
otherwise noted.
c) The limiting values are stress ratings only. Operating the part at these values is not recommended, and proper operation is not
guaranteed. The conditions for functional operation are specified in Table 7.
[2]
Maximum/minimum voltage above the maximum operating voltage (see Table 7) and below ground that can be applied for a short time
(< 10 ms) to a device without leading to irrecoverable failure. Failure includes the loss of reliability and shorter lifetime of the device.
[3]
See Table 18 for maximum operating voltage.
[4]
Including voltage on outputs in 3-state mode.
[5]
The maximum non-operating storage temperature is different than the temperature for required shelf life which should be determined
based on required shelf lifetime. Please refer to the JEDEC spec (J-STD-033B.1) for further details.
[6]
Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor.
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10. Thermal characteristics
10.1 Thermal characteristics
The average chip junction temperature, TJ (C), can be calculated using the following
equation:
T J = T amb + P D R th j – a
(1)
• Tamb = ambient temperature (C),
• Rth(j-a) = the package junction-to-ambient thermal resistance (C/W)
• PD = sum of internal and I/O power dissipation
The internal power dissipation is the product of IDD and VDD. The I/O power dissipation of
the I/O pins is often small and many times can be negligible. However it can be significant
in some applications.
Table 6.
Thermal resistance (15 %)
Symbol Parameter
Conditions
Max/Min
Unit
JEDEC (4.5 in 4 in); still air
39.46
C/W
Single-layer (4.5 in 3 in); still air 59.39
C/W
6.769
C/W
LQFP80
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Rth(j-a)
thermal resistance from
junction to ambient
Rth(j-c)
thermal resistance from
junction to case
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11. Static characteristics
Table 7.
Static characteristics
Tamb = 40 C to +85 C, unless otherwise specified.
Min
Typ[1]
Max
Unit
2.4
3.3
3.6
V
2.4
3.3
3.6
V
[3][4]
2.5
3.3
3.6
V
input voltage on pin
VBAT
[5]
2.1
3.3
3.6
V
Vi(VREFP)
input voltage on pin
VREFP
[3]
2.5
3.3
VDDA
V
IDD(REG)(3V3)
regulator supply current active mode; code
(3.3 V)
while(1){}
Symbol
Parameter
Conditions
VDD(3V3)
supply voltage (3.3 V)
external rail
VDD(REG)(3V3)
regulator supply voltage
(3.3 V)
VDDA
analog 3.3 V pad supply
voltage
Vi(VBAT)
Supply pins
[2]
executed from flash; all
peripherals disabled;
PCLK = CCLK⁄8
CCLK = 12 MHz; PLL
disabled
[6][7]
-
7
-
mA
CCLK = 100 MHz; PLL
enabled
[6][7]
-
42
-
mA
CCLK = 100 MHz; PLL
enabled (LPC1759)
[6][8]
CCLK = 120 MHz; PLL
enabled (LPC1759)
[6][8]
-
67
-
mA
[6][9]
-
2
-
mA
deep sleep mode
[6][10]
-
240
-
A
power-down mode
[6][10]
-
31
-
A
[11]
-
630
-
nA
VDD(REG)(3V3) present
[12]
-
530
-
nA
VDD(REG)(3V3) not
present
[13]
1.1
-
A
deep sleep mode
[14][15]
-
40
-
nA
power-down mode
[14][15]
-
40
-
nA
[14]
-
10
-
nA
sleep mode
deep power-down mode;
RTC running
IBAT
IDD(IO)
battery supply current
I/O supply current
Deep power-down mode;
RTC running
deep power-down mode
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Table 7.
Static characteristics …continued
Tamb = 40 C to +85 C, unless otherwise specified.
Symbol
IDD(ADC)
Parameter
ADC supply current
Min
Typ[1]
Max
Unit
[16][17]
-
1.95
-
mA
[16][18]
-
>
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10.1
11
11.1
11.2
11.3
12
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
13
14
15
15.1
15.2
15.3
15.4
15.5
15.6
16
17
18
19
20
21
21.1
21.2
21.3
21.4
22
23
Thermal characteristics. . . . . . . . . . . . . . . . . .
Static characteristics. . . . . . . . . . . . . . . . . . . .
Power consumption . . . . . . . . . . . . . . . . . . . .
Peripheral power consumption . . . . . . . . . . . .
Electrical pin characteristics . . . . . . . . . . . . . .
Dynamic characteristics . . . . . . . . . . . . . . . . .
Flash memory . . . . . . . . . . . . . . . . . . . . . . . . .
External clock . . . . . . . . . . . . . . . . . . . . . . . . .
Internal oscillators. . . . . . . . . . . . . . . . . . . . . .
I/O pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I2C-bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I2S-bus interface (LPC1759/58/56 only) . . . . .
SSP interface . . . . . . . . . . . . . . . . . . . . . . . . .
USB interface . . . . . . . . . . . . . . . . . . . . . . . . .
SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADC electrical characteristics . . . . . . . . . . . .
DAC electrical characteristics
(LPC1759/58/56/54 only) . . . . . . . . . . . . . . . . .
Application information. . . . . . . . . . . . . . . . . .
Suggested USB interface solutions . . . . . . . .
Crystal oscillator XTAL input and component
selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XTAL Printed-Circuit Board (PCB) layout
guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard I/O pin configuration . . . . . . . . . . . .
Reset pin configuration . . . . . . . . . . . . . . . . . .
ElectroMagnetic Compatibility (EMC) . . . . . . .
Package outline . . . . . . . . . . . . . . . . . . . . . . . .
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . .
References . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision history . . . . . . . . . . . . . . . . . . . . . . . .
Legal information. . . . . . . . . . . . . . . . . . . . . . .
Data sheet status . . . . . . . . . . . . . . . . . . . . . .
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact information. . . . . . . . . . . . . . . . . . . . .
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39
40
43
46
47
49
49
49
50
50
51
53
55
57
58
60
63
64
64
67
68
69
70
71
72
73
74
74
75
77
77
77
77
78
78
79
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP Semiconductors N.V. 2015.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 18 August 2015
Document identifier: LPC1759_58_56_54_52_51
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