Freescale Semiconductor
Data Sheet: Technical Data
Document Number: MCF51AC256
Rev.7, 9/2011
MCF51AC256
MCF51AC256 Series
ColdFire Microcontroller
80 LQFP
14 mm 14 mm
Covers:MCF51AC256A
MCF51AC256B
MCF51AC128A
MCF51AC128C
The MCF51AC256 series are members of the
ColdFire® family of 32-bit variable-length reduced
instruction set (RISC) microcontroller. This
document provides an overview of the
MCF51AC256 series, focusing on its highly
integrated and diverse feature set.
44 LQFP
10 mm 10 mm
•
•
•
•
64 QFP
14 mm 14 mm
Two serial communications interfaces (SCI)
Up to two serial peripheral interfaces (SPI)
Two flexible timer modules (FTM)
Timer pulse-width modulator (TPM)
The MCF51AC256 series are based on the V1
ColdFire core and operates at processor core speeds
up to 50.33 MHz. As part of Freescale’s Controller
Continuum®, it is an ideal upgrade for designs
based on the MC9S08AC128 series of 8-bit
microcontrollers.
The MCF51AC256 features the following
functional units:
• V1 ColdFire core with background debug
module
• Up to 256 KB of flash memory
• Up to 32 KB of static RAM (SRAM)
• Up to two analog comparators (ACMP)
• Analog-to-digital converter (ADC) with up
to 24 channels
• Controller-area network (CAN)
• Cyclic redundancy check (CRC)
• Inter-integrated circuit (IIC)
• Keyboard interrupt (KBI)
• Multipurpose clock generator (MCG)
• Rapid general-purpose input/output
(RGPIO)
This document contains information on a product under development. Freescale reserves the
right to change or discontinue this product without notice.
© Freescale Semiconductor, Inc., 2008-2011. All rights reserved.
64 LQFP
10 mm 10 mm
Table of Contents
1
2
3
4
MCF51AC256 Family Configurations . . . . . . . . . . . . . . . . . . . .3
1.1 Device Comparison. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.3.1 Feature List . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.4 Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
1.5 Pinouts and Packaging . . . . . . . . . . . . . . . . . . . . . . . . .12
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.1 Parameter Classification . . . . . . . . . . . . . . . . . . . . . . . .17
2.2 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . .17
2.3 Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . .18
2.4 Electrostatic Discharge (ESD) Protection Characteristics
19
2.5 DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2.6 Supply Current Characteristics . . . . . . . . . . . . . . . . . . .25
2.7 Analog Comparator (ACMP) Electricals . . . . . . . . . . . .27
2.8 ADC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . .28
2.9 External Oscillator (XOSC) Characteristics . . . . . . . . .31
2.10 MCG Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .32
2.11 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
2.11.1 Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.11.2 Timer (TPM/FTM) Module Timing . . . . . . . . . . .35
2.11.3 MSCAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
2.12 SPI Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2.13 Flash Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .38
2.14 EMC Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
2.14.1 Radiated Emissions . . . . . . . . . . . . . . . . . . . . . .39
Mechanical Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . .40
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
List of Figures
Figure 1. MCF51AC256 Series Block Diagram . . . . . . . . . . . . . . 5
Figure 2. MCF51AC256 Series ColdFire Microcontroller
80-Pin LQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 3. MCF51AC256 Series ColdFire Microcontroller
64-Pin QFP/LQFP. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4. MCF51AC256 Series ColdFire Microcontroller
44-Pin LQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 5. Typical IOH vs. VDD–VOH at VDD = 3 V
(Low Drive, PTxDSn = 0) . . . . . . . . . . . . . . . . . . . . . . 22
Figure 6. Typical IOH vs. VDD–VOH at VDD = 3 V
(High Drive, PTxDSn = 1) . . . . . . . . . . . . . . . . . . . . . . 23
Figure 7. Typical IOH vs. VDD–VOH at VDD = 5 V
(Low Drive, PTxDSn = 0) . . . . . . . . . . . . . . . . . . . . . . 23
Figure 8. Typical IOH vs. VDD–VOH at VDD = 5 V
(High Drive, PTxDSn = 1) . . . . . . . . . . . . . . . . . . . . . .
Figure 9. Typical Run IDD vs. System Clock Freq.
for FEI and FBE Modes . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10.ADC Input Impedance Equivalency Diagram. . . . . . .
Figure 11.Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 12.IRQ/KBIPx Timing . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 13.Timer External Clock . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 14.Timer Input Capture Pulse . . . . . . . . . . . . . . . . . . . . .
Figure 15.SPI Master Timing (CPHA = 0) . . . . . . . . . . . . . . . . .
Figure 16.SPI Master Timing (CPHA =1) . . . . . . . . . . . . . . . . . .
Figure 17.SPI Slave Timing (CPHA = 0) . . . . . . . . . . . . . . . . . .
Figure 18.SPI Slave Timing (CPHA = 1) . . . . . . . . . . . . . . . . . .
24
27
29
34
34
35
35
37
37
38
38
List of Tables
Table 1. MCF51AC256 Series Device Comparison . . . . . . . . . . 3
Table 2. MCF51AC256 Series Functional Units . . . . . . . . . . . . . 6
Table 3. Orderable Part Number Summary. . . . . . . . . . . . . . . . 10
Table 4. Pin Availability by Package Pin-Count . . . . . . . . . . . . . 14
Table 5. Parameter Classifications . . . . . . . . . . . . . . . . . . . . . . 17
Table 6. Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . 18
Table 7. Thermal Characteristics. . . . . . . . . . . . . . . . . . . . . . . . 18
Table 8. ESD and Latch-up Test Conditions . . . . . . . . . . . . . . . 20
Table 9. ESD and Latch-Up Protection Characteristics. . . . . . . 20
Table 10.DC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 11. Supply Current Characteristics. . . . . . . . . . . . . . . . . . 25
Table 12.Analog Comparator Electrical Specifications. . . . . . . . 27
Table 13.5 Volt 12-bit ADC Operating Conditions . . . . . . . . . . . 28
Table 14.5 Volt 12-bit ADC Characteristics
(VREFH = VDDA, VREFL = VSSA) . . . . . . . . . . . . . . . . . . 29
Table 15.Oscillator Electrical Specifications
(Temperature Range = –40 to 105 C Ambient) . . . . . 31
Table 16.MCG Frequency Specifications
(Temperature Range = –40 to 105 C Ambient) . . . . . 32
Table 17.Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 18.TPM/FTM Input Timing . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 19.MSCAN Wake-Up Pulse Characteristics . . . . . . . . . . . 35
Table 20.SPI Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 21.Flash Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 22.Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 23.Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
2
Freescale Semiconductor
MCF51AC256 Family Configurations
1
MCF51AC256 Family Configurations
1.1
Device Comparison
The MCF51AC256 series is summarized in Table 1.
Table 1. MCF51AC256 Series Device Comparison
MCF51AC256A
MCF51AC256B
MCF51AC128A
80-pin 64-pin
80-pin 64-pin 44-pin
MCF51AC128C
Feature
80-pin
64-pin
80-pin
Flash memory size (Kbytes)
256
128
RAM size (Kbytes)
32
32 or 161
V1 ColdFire core with BDM (background
debug module)
Yes
ACMP1 (analog comparator)
Yes
ACMP2 (analog comparator)
Yes
ADC (analog-to-digital converter) channels
(12-bit)
24
CAN (controller area network)
Yes
20
24
Yes
No
20
9
24
No
CRC (cyclic redundancy check)
Yes
RTI
Yes
DBG (debug)
Yes
IIC1 (inter-integrated circuit)
Yes
IRQ (interrupt request input)
Yes
INTC (interrupt controller)
Yes
KBI (keyboard interrupts)
Yes
LVD (low-voltage detector)
Yes
MCG (multipurpose clock generator)
Yes
OSC (crystal oscillator)
Yes
69
54
RGPIO (rapid general-purpose I/O)
69
54
36
16
69
SPI1 (serial peripheral interface)
Yes
No
FTM1 (flexible timer module) channels
FTM2 channels
Yes
No
6
6
2
54
Yes
2
2
69
No
4
6
20
9
54
36
16
Yes
Yes
24
No
12
SCI1, SCI2 (serial communications
interfaces)
SPI2 (serial peripheral interface)
20
No
Yes
Yes
Port I/O
44-pin
Yes
COP (computer operating properly)
2
64-pin
12
Yes
No
6
6
2
4
6
2
2
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
3
MCF51AC256 Family Configurations
Table 1. MCF51AC256 Series Device Comparison (continued)
MCF51AC256A
MCF51AC256B
80-pin 64-pin
80-pin 64-pin 44-pin
MCF51AC128A
MCF51AC128C
Feature
TPM3 (timer pulse-width modulator)
channels
2
64-pin
80-pin
No
Yes
64-pin
44-pin
2
VBUS (debug visibility bus)
1
80-pin
Yes
No
Yes
No
Yes
No
The members of MCF51AC128A with CAN support have 32 KB RAM. The other members have 16 KB RAM.
Up to 16 pins on Ports E and F are shared with the ColdFire Rapid GPIO module.
1.2
Block Diagram
Figure 1 shows the connections between the MCF51AC256 series pins and modules.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
4
Freescale Semiconductor
TPMCLK
ColdFire V1 core
RESET
FTM1
SIM
IRQ/
TPMCLK
TPMCLK
COP
LVD
IRQ
FTM2
FLASH
MCF51AC256A/B = 256 KB
MCF51AC128A/C = 128 KB
TPMCLK
TPM3
RAM
VDD
VSS
VSS
Port F:
FTM1CH5
FTM1CH4
FTM1CH3
FTM1CH2
Port E:
FTM1CH1
FTM1CH0
Port H:
FTM2CH5
FTM2CH4
FTM2CH3
FTM2CH2
Port F:
FTM2CH1
FTM2CH0
KBI
MCG
OSC
Port G:
KBI1P4
KBI1P3
KBI1P2
KBI1P1
KBI1P0
Port D:
KBI1P7
KBI1P6
KBI1P5
Port G:
EXTAL
XTAL
Port B
Port C:
SDA1
SCL1
LPO
Port B:
TPM3CH1
TPM3CH0
Port A:
RxCAN
TxCAN
Port F
Port F:
RGPIO15
RGPIO14
RGPIO13
RGPIO12
RGPIO11
RGPIO10
RGPIO9
RGPIO8
Port E:
RGPIO7
RGPIO6
RGPIO5
RGPIO4
RGPIO3
RGPIO2
RGPIO1
RGPIO0
IIC
CAN
MCF51AC256A/B = 32 KB
MCF51AC128A = 32 KB
MCF51AC128C = 16 KB
RGPIO
ACMP2+
Port C
BKPT
Port A:
ACMP2O
ACMP2 ACMP2–
Port D
BDM
ADC
CRC
SCI1
Port E:
RxD1
TxD1
SCI2
Port C:
RxD2
TxD2
SPI1
Port E:
SS1
SPSCK1
MOSI1
MISO1
RTI
VREG
SPI2
Port H:
SPSCK2
MOSI2
MISO2
Port C:
SS2
PTA7/AD1P17
PTA6/AD1P16
PTA5/ACMP2+
PTA4/ACMP2–
PTA3/ACMP2O
PTA2
PTA1/RxCAN
PTA0/TxCAN
PTB7/AD1P7
PTB6/AD1P6
PTB5/AD1P5
PTB4/AD1P4
PTB3/AD1P3
PTB2/AD1P2
PTB1/TPM3CH1/AD1P1
PTB0/TPM3CH0/AD1P0
PTC6/FTM2FLT
PTC5/RxD2
PTC4/SS2
PTC3/TxD2
PTC2/MCLK
PTC1/SDA1
PTC0/SCL1
PTD7/KBI1P7/AD1P15
PTD6/FTM1CLK/AD1P14
PTD5/AD1P13
PTD4/FTM2CLK/AD1P12
PTD3/KBI1P6/AD1P11
PTD2/KBI1P5/AD1P10/ACMP1O
PTD1/AD1P9/ACMP1–
PTD0/AD1P8/ACMP1+
PTE7/RGPIO7/SPSCK1
PTE6/RGPIO6/MOSI1
PTE5/RGPIO5/MISO1
PTE4/RGPIO4/SS1
PTE3/RGPIO3/FTM1CH1
PTE2/RGPIO2/FTM1CH0
PTE1/RGPIO1/RxD1
PTE0/RGPIO0/TxD1
PTF7/RGPIO15
PTF6/RGPIO14/FTM1FLT
PTF5/RGPIO13/FTM2CH1
PTF4/RGPIO12/FTM2CH0
PTF3/RGPIO11/FTM1CH5
PTF2/RGPIO10/FTM1CH4
PTF1/RGPIO9/FTM1CH3
PTF0/RGPIO8/FTM1CH2
Port G
BKGD/MS
Port J:
DDATA3DDATA0
PST3VBUS PST0
Port H:
PSTCLK
Port D:
ACMP1O
ACMP1 ACMP1–
ACMP1+
PTG6/EXTAL
PTG5/XTAL
PTG4/KBI1P4/AD1P19
PTG3/KBI1P3/AD1P18
PTG2/KBI1P2
PTG1/KBI1P1
PTG0/KBI1P0
Port H
DBG
Port B:
AD1P7–
AD1P0
Port D:
AD1P15–
AD1P8
Port A:
ADP17–
ADP16
Port G:
ADP19–
ADP18
Port H:
ADP23–
ADP20
Port E
VREFH
VREFL
VDDA
VSSA
PTH6/MISO2
PTH5/MOSI2
PTH4/SPSCK2
PTH3/FTM2CH5/BKPT/AD1P23
PTH2/FTM2CH4/PSTCLK1/AD1P22
PTH1/FTM2CH3/PSTCLK0/AD1P21
PTH0/FTM2CH2/AD1P20
Port J
VREFH
VREFL
VDDA
VSSA
Port A
MCF51AC256 Family Configurations
PTJ7/DDATA3
PTJ6/DDATA2
PTJ5/DDATA1
PTJ4/DDATA0
PTJ3/PST3
PTJ2/PST2
PTJ1/PST1
PTJ0/PST0
Figure 1. MCF51AC256 Series Block Diagram
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
5
MCF51AC256 Family Configurations
1.3
Features
Table 2 describes the functional units of the MCF51AC256 series.
Table 2. MCF51AC256 Series Functional Units
Functional Unit
Function
CF1 Core (V1 ColdFire core)
Executes programs and interrupt handlers
BDM (background debug module)
Provides single pin debugging interface (part of the V1 ColdFire core)
DBG (debug)
Provides debugging and emulation capabilities (part of the V1 ColdFire
core)
VBUS (debug visibility bus)
Allows for real-time program traces (part of the V1 ColdFire core)
SIM (system integration module)
Controls resets and chip level interfaces between modules
Flash (flash memory)
Provides storage for program code, constants and variables
RAM (random-access memory)
Provides storage for program variables
RGPIO (rapid general-purpose input/output)
Allows for I/O port access at CPU clock speeds
VREG (voltage regulator)
Controls power management across the device
COP (computer operating properly)
Monitors a countdown timer and generates a reset if the timer is not
regularly reset by the software
LVD (low-voltage detect)
Monitors internal and external supply voltage levels, and generates a reset
or interrupt when the voltages are too low
CF1_INTC (interrupt controller)
Controls and prioritizes all device interrupts
ADC (analog-to-digital converter)
Measures analog voltages at up to 12 bits of resolution
FTM1, FTM2 (flexible timer/pulse-width
modulators)
Provides a variety of timing-based features
TPM3 (timer/pulse-width modulator)
Provides a variety of timing-based features
CRC (cyclic redundancy check)
Accelerates computation of CRC values for ranges of memory
ACMP1, ACMP2 (analog comparators)
Compares two analog inputs
IIC (inter-integrated circuit)
Supports standard IIC communications protocol
KBI (keyboard interrupt)
Provides pin interrupt capabilities
MCG (multipurpose clock generator)
Provides clocking options for the device, including a phase-locked loop
(PLL) and frequency-locked loop (FLL) for multiplying slower reference
clock sources
OSC (crystal oscillator)
Allows a crystal or ceramic resonator to be used as the system clock source
or reference clock for the PLL or FLL
LPO (low-power oscillator)
Provides a second clock source for COP and RTI.
CAN (controller area network)
Supports standard CAN communications protocol
SCI1, SCI2 (serial communications interfaces)
Serial communications UARTs capable of supporting RS-232 and LIN
protocols
SPI1 (8-bit serial peripheral interfaces)
Provides 8-bit 4-pin synchronous serial interface
SPI2 (16-bit serial peripheral interfaces)
Provides 16-bit 4-pin synchronous serial interface with FIFO
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
6
Freescale Semiconductor
MCF51AC256 Family Configurations
1.3.1
•
•
•
•
•
•
•
Feature List
32-bit Version 1 ColdFire® central processor unit (CPU)
— Up to 50.33 MHz at 2.7 V – 5.5 V
— Provide 0.94 Dhrystone 2.1 DMIPS per MHz performance when running from internal RAM
(0.76 DMIPS per MHz when running from flash)
— Implements instruction set revision C (ISA_C)
On-chip memory
— Up to 256 KB flash memory read/program/erase over full operating voltage and temperature
— Up to 32 KB static random access memory (SRAM)
— Security circuitry to prevent unauthorized access to SRAM and flash contents
Power-Saving Modes
— Three low-power stop plus wait modes
— Peripheral clock enable register can disable clocks to unused modules, reducing currents;
allows clocks to remain enabled to specific peripherals in stop3 mode
System protection features
— Watchdog computer operating properly (COP) reset with options to run from independent LPO
clock or bus clock
— Low-voltage detection with reset or interrupt
— Illegal opcode and illegal address detection with programmable reset or exception response
— Flash block protection
Debug support
— Single-wire background debug interface
— Real-time debug support, with 6 hardware breakpoints (4 PC, 1 address pair and 1 data) that
can be configured into a 1- or 2-level trigger
— On-chip trace buffer provides programmable start/stop recording conditions plus support for
continuous or PC-profiling modes
— Support for real-time program (and optional partial data) trace using the debug visibility bus
V1 ColdFire interrupt controller (CF1_INTC)
— Support of 40 peripheral I/O interrupt requests plus seven software (one per level) interrupt
requests
— Fixed association between interrupt request source and level plus priority, up to two requests
can be remapped to the highest maskable level + priority
— Unique vector number for each interrupt source
— Support for service routine interrupt acknowledge (software IACK) read cycles for improved
system performance
Multipurpose clock generator (MCG)
— Oscillator (XOSC); loop-control Pierce oscillator; crystal or ceramic resonator range of 31.25
kHz to 38.4 kHz or 1 MHz to 16 MHz
— LPO clock as an optional independent clock source for COP and RTI
— FLL/PLL controlled by internal or external reference
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
7
MCF51AC256 Family Configurations
•
•
•
•
•
— Trimmable internal reference allows 0.2% resolution and 2% deviation
Analog-to-digital converter (ADC)
— 24 analog inputs with 12 bits resolution
— Output formatted in 12-, 10- or 8-bit right-justified format
— Single or continuous conversion (automatic return to idle after single conversion)
— Operation in low-power modes for lower noise operation
— Asynchronous clock source for lower noise operation
— Automatic compare with interrupt for less-than, or greater-than or equal-to, programmable
value
— On-chip temperature sensor
Flexible timer/pulse-width modulators (FTM)
— 16-bit Free-running counter or a counter with initial and final value. The counting can be up
and unsigned, up and signed, or up-down and unsigned
— Up to 6 channels, and each channel can be configured for input capture, output compare or
edge-aligned PWM mode, all channels can be configured for center-aligned PWM mode
– Channels can operate as pairs with equal outputs, pairs with complimentary outputs or
independent channels (with independent outputs)
– Each pair of channels can be combined to generate a PWM signal (with independent control
of both edges of PWM signal)
– Deadtime insertion is available for each complementary pair
— The load of the FTM registers which have write buffer can be synchronized; write protection
for critical registers
— Generation of the triggers to ADC (hardware trigger)
— A fault input for global fault control
— Backwards compatible with TPM
Timer/pulse width modulator (TPM)
— 16-bit free-running or modulo up/down count operation
— Two channels, each channel may be input capture, output compare, or edge-aligned PWM
— One interrupt per channel plus terminal count interrupt
Cyclic redundancy check (CRC) generator
— High speed hardware CRC generator circuit using 16-bit shift register
— CRC16-CCITT compliancy with x16 + x12 + x5 + 1 polynomial
— Error detection for all single, double, odd, and most multi-bit errors
— Programmable initial seed value
Analog comparators (ACMP)
— Full rail to rail supply operation
— Selectable interrupt on rising edge, falling edge, or either rising or falling edges of comparator
output
— Option to compare to fixed internal bandgap reference voltage
— Option to allow comparator output to be visible on a pin, ACMPxO
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
8
Freescale Semiconductor
MCF51AC256 Family Configurations
•
•
•
•
Inter-integrated circuit (IIC)
— Compatible with IIC bus standard
— Multi-master operation
— Software programmable for one of 64 different serial clock frequencies
— Interrupt driven byte-by-byte data transfer
— Arbitration lost interrupt with automatic mode switching from master to slave
— Calling address identification interrupt
— Bus busy detection
— 10-bit address extension
Controller area network (CAN)
— Implementation of the CAN protocol — Version 2.0A/B
– Standard and extended data frames
– Zero to eight bytes data length
– Programmable bit rate up to 1 Mbps
– Support for remote frames
— Five receive buffers with FIFO storage scheme
— Three transmit buffers with internal prioritization using a “local priority” concept
— Flexible maskable identifier filter supports two full-size (32-bit) extended identifier filters, four
16-bit filters, or eight 8-bit filters
— Programmable wakeup functionality with integrated low-pass filter
— Programmable loopback mode supports self-test operation
— Programmable listen-only mode for monitoring of CAN bus
— Programmable bus-off recovery functionality
— Separate signalling and interrupt capabilities for all CAN receiver and transmitter error states
(warning, error passive, bus-off)
— Internal timer for time-stamping of received and transmitted messages
Serial communications interfaces (SCI)
— Full-duplex, standard non-return-to-zero (NRZ) format
— Double-buffered transmitter and receiver with separate enables
— Programmable baud rates (13-bit modulo divider)
— Interrupt-driven or polled operation
— Hardware parity generation and checking
— Programmable 8-bit or 9-bit character length
— Receiver wakeup by idle-line or address-mark
— Optional 13-bit break character generation / 11-bit break character detection
— Selectable transmitter output polarity
Serial peripheral interfaces (SPI)
— Master or slave mode operation
— Full-duplex or single-wire bidirectional option
— Programmable transmit bit rate
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
9
MCF51AC256 Family Configurations
•
1.4
— Double-buffered transmit and receive
— Serial clock phase and polarity options
— Slave select output
— Selectable MSB-first or LSB-first shifting
— 16-bit and FIFO operations in SPI2
Input/Output
— 69 GPIOs
— 8 keyboard interrupt pins with selectable polarity
— Hysteresis and configurable pull-up device on all input pins; Configurable slew rate and drive
strength on all output pins
— 16-bits Rapid GPIO pins connected to the processor’s local 32-bit platform bus with set, clear,
and faster toggle functionality
Part Numbers
MCF 51 AC 256 X V XX E
Pb free indicator
Package designator
Temperature range
(V = –40C to 105C, C= –40C to 85C )
CAN Feature (A: With CAN, B/C: Without CAN)
Status
(MCF = Fully Qualified ColdFire)
(PCF = Product Engineering)
Core
Family
Memory size designator
Table 3. Orderable Part Number Summary
Freescale Part Number
Description
Flash / SRAM
(Kbytes)
Package
Temperature
MCF51AC256AVFUE
MCF51AC256 ColdFire Microcontroller with CAN
256 / 32
64 QFP
–40°C to 105°C
MCF51AC256BVFUE
MCF51AC256 ColdFire Microcontroller without CAN
256 / 32
64 QFP
–40°C to 105°C
MCF51AC256AVLKE
MCF51AC256 ColdFire Microcontroller with CAN
256 / 32
80 LQFP
–40°C to 105°C
MCF51AC256BVLKE
MCF51AC256 ColdFire Microcontroller without CAN
256 / 32
80 LQFP
–40°C to 105°C
MCF51AC256AVPUE
MCF51AC256 ColdFire Microcontroller with CAN
256 / 32
64 LQFP
–40°C to 105°C
MCF51AC256BVPUE MCF51AC256 ColdFire Microcontroller without CAN
256 / 32
64 LQFP
–40°C to 105°C
MCF51AC128AVFUE
128 / 32
64 QFP
–40°C to 105°C
MCF51AC128CVFUE MCF51AC128 ColdFire Microcontroller without CAN
128 / 16
64 QFP
–40°C to 105°C
MCF51AC128AVLKE
MCF51AC128 ColdFire Microcontroller with CAN
128 / 32
80 LQFP
–40°C to 105°C
MCF51AC128CVLKE
MCF51AC128 ColdFire Microcontroller without CAN
128 / 16
80 LQFP
–40°C to 105°C
MCF51AC128AVPUE
MCF51AC128 ColdFire Microcontroller with CAN
128 / 32
64 LQFP
–40°C to 105°C
MCF51AC128CVPUE MCF51AC128 ColdFire Microcontroller without CAN
128 / 16
64 LQFP
–40°C to 105°C
MCF51AC256ACFUE MCF51AC256 ColdFire Microcontroller with CAN
256 / 32
64 QFP
–40°C to 85°C
MCF51AC256BCFUE MCF51AC256 ColdFire Microcontroller without CAN
256 / 32
64 QFP
–40°C to 85°C
MCF51AC256ACLKE
MCF51AC256 ColdFire Microcontroller with CAN
256 / 32
80 LQFP
–40°C to 85°C
MCF51AC256BCLKE
MCF51AC256 ColdFire Microcontroller without CAN
256 / 32
80 LQFP
–40°C to 85°C
MCF51AC128 ColdFire Microcontroller with CAN
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
10
Freescale Semiconductor
MCF51AC256 Family Configurations
Table 3. Orderable Part Number Summary
MCF51AC256ACPUE MCF51AC256 ColdFire Microcontroller with CAN
256 / 32
64 LQFP
–40°C to 85°C
MCF51AC256BCPUE MCF51AC256 ColdFire Microcontroller without CAN
256 / 32
64 LQFP
–40°C to 85°C
MCF51AC256BCFGE MCF51AC256 ColdFire Microcontroller without CAN
256/32
44 LQFP
–40°C to 85°C
MCF51AC128ACFUE MCF51AC128 ColdFire Microcontroller with CAN
128 / 32
64 QFP
–40°C to 85°C
MCF51AC128CCFUE MCF51AC128 ColdFire Microcontroller without CAN
128 / 16
64 QFP
–40°C to 85°C
MCF51AC128ACLKE
MCF51AC128 ColdFire Microcontroller with CAN
128 / 32
80 LQFP
–40°C to 85°C
MCF51AC128CCLKE
MCF51AC128 ColdFire Microcontroller without CAN
128 / 16
80 LQFP
–40°C to 85°CC
MCF51AC128ACPUE MCF51AC128 ColdFire Microcontroller with CAN
128 / 32
64 LQFP
–40°C to 85°C
MCF51AC128CCPUE MCF51AC128 ColdFire Microcontroller without CAN
128 / 16
64 LQFP
–40°C to 85°C
MCF51AC128CCFGE MCF51AC128 ColdFire Microcontroller without CAN
128 / 16
44 LQFP
–40°C to 85°C
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
11
MCF51AC256 Family Configurations
1.5
Pinouts and Packaging
80-Pin
LQFP
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
PTE4 / RGPIO4 / SS1
PTE5 / RGPIO5 / MISO1
PTE6 / RGPIO6 / MOSI1
PTE7 / RGPIO7 / SPSCK1
VSS
VDD
PTJ4 / DDATA0
PTJ5 / DDATA1
PTJ6 / DDATA2
PTJ7 / DDATA3
PTG0 / KBI1P0
PTG1 / KBI1P1
PTG2 / KBI1P2
•PTA0 / TxCAN
•PTA1 / RxCAN
PTA2
PTA3 / ACMP2O
PTA4 / ACMP2–
PTA5 / ACMP2+
PTA6 / AD1P16
PTC4 / SS2
IRQ / TPMCLK
RESET
PTF0 / RGPIO8 / FTM1CH2
PTF1 / RGPIO9 / FTM1CH3
PTF2 / RGPIO10 / FTM1CH4
PTF3 / RGPIO11 / FTM1CH5
PTF4 / RGPIO12 / FTM2CH0
PTC6 / FTM2FLT
PTF7 / RGPIO15
PTF5 / RGPIO13 / FTM2CH1
PTF6 / RGPIO14 / FTM1FLT
PTJ0 / PST0
PTJ1 / PST1
PTJ2 / PST2
PTJ3 / PST3
PTE0 / RGPIO0 / TxD1
PTE1 / RGPIO1 / RxD1
PTE2 / RGPIO2 / FTM1CH0
PTE3 / RGPIO3 / FTM1CH1
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
PTC5 / RxD2
PTC3 / TxD2
PTC2 / MCLK
PTH6 / MISO2
PTH5 / MOSI2
PTH4 / SPSCK2
PTC1 / SDA1
PTC0 / SCL1
VDD
VSS
PTG6 / EXTAL
PTG5 / XTAL
BKGD / MS
VREFL
VREFH
PTD7 / KBI1P7 / AD1P15
PTD6 / FTM1CLK / AD1P14
PTD5 / AD1P13
PTD4/FTM2CLK/AD1P12
PTG4 / KBI1P4 / AD1P19
Figure 2 shows the pinout of the 80-pin LQFP.
PTG3 / KBI1P3 / AD1P18
PTD3 / KBI1P6 / AD1P11
PTD2 / KBI1P5 / AD1P10 / ACMP1O
VSSA
VDDA
PTD1 / AD1P9 / ACMP1–
PTD0 / AD1P8 / ACMP1+
PTB7 / AD1P7
PTB6 / AD1P6
PTB5 / AD1P5
PTB4 / AD1P4
PTB3 / AD1P3
PTB2 / AD1P2
PTB1 / TPM3CH1 / AD1P1
PTB0 / TPM3CH0 / AD1P0
PTH3 / FTM2CH5 / BKPT / AD1P23
PTH2 / FTM2CH4 / PSTCLK1 / AD1P22
PTH1 / FTM2CH3 / PSTCLK0 / AD1P21
PTH0 / FTM2CH2 / AD1P20
PTA7 / AD1P17
• TxCAN and RxCAN are not available in the
members that do not support CAN
Figure 2. MCF51AC256 Series ColdFire Microcontroller 80-Pin LQFP
Figure 3 shows the pinout of the 64-pin LQFP and QFP.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
12
Freescale Semiconductor
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
PTC5 / RxD2
PTC3 / TxD2
PTC2 / MCLK
PTC1 / SDA1
PTC0 / SCL1
VSS
PTG6 / EXTAL
PTG5 / XTAL
BKGD / MS
VREFL
VREFH
PTD7 / KBI1P7 / AD1P15
PTD6 / FTM1CLK / AD1P14
PTD5 / AD1P13
PTD4 / FTM2CLK / AD1P12
PTG4 / KBI1P4 / AD1P19
MCF51AC256 Family Configurations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
64-Pin QFP
64-Pin LQFP
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
PTG3 / KBI1P3 / AD1P18
PTD3 / KBI1P6 / AD1P11
PTD2 / KBI1P5 / AD1P10 /ACMP1O
VSSA
VDDA
PTD1 / AD1P9 / ACMP1–
PTD0 / AD1P8 / ACMP1+
PTB7 / AD1P7
PTB6 / AD1P6
PTB5 / AD1P5
PTB4 / AD1P4
PTB3 / AD1P3
PTB2 / AD1P2
PTB1 / TPM3CH1 / AD1P1
PTB0 / TPM3CH0 / AD1P0
PTA7 / AD1P17
PTE4 / RGPIO4 / SS1
PTE5 / RGPIO5 / MISO1
PTE6 / RGPIO6 / MOSI1
PTE7 / RGPIO7 / SPSCK1
VSS
VDD
PTG0 / KBI1P0
PTG1 / KBI1P1
PTG2 / KBI1P2
•PTA0 / TxCAN
•PTA1 / RxCAN
PTA2
PTA3 / ACMP2O
PTA4 / ACMP2–
PTA5 / ACMP2+
PTA6 / AD1P16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
PTC4
IRQ / TPMCLK
RESET
PTF0 / RGPIO8 / FTM1CH2
PTF1 / RGPIO9 / FTM1CH3
PTF2 / RGPIO10 / FTM1CH4
PTF3 / RGPIO11 / FTM1CH5
PTF4 / RGPIO12 / FTM2CH0
PTC6 / FTM2FLT
PTF7 / RGPIO15
PTF5 / RGPIO13 / FTM2CH1
PTF6 / RGPIO14 / FTM1FLT
PTE0 / RGPIO0 / TxD1
PTE1 / RGPIO1 / RxD1
PTE2 / RGPIO2 / FTM1CH0
PTE3 / RGPIO3 / FTM1CH1
• TxCAN and RxCAN are not available in the
members that do not support CAN
Figure 3. MCF51AC256 Series ColdFire Microcontroller 64-Pin QFP/LQFP
Figure 4 shows the pinout of the 44-pin LQFP.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
13
PTC2/MCLK
PTC1/SDA1
PTC0/SCL1
VSS
PTG6/EXTAL
PTG5/XTAL
BKGD/MS
VREFL
43
42
41
40
39
38
37
36
35
34
44
PTC4 1
VREFH
PTC3/TxD2
PTC5/RxD2
MCF51AC256 Family Configurations
33 PTG3/KBI1P3/AD1P18
IRQ/TPMCLK
2
32
PTD3/KBI1P6/AD1P11
RESET
3
31
PTD2/KBI1P5/AD1P10/ACMP1O
PTF0/RGPIO8/FTM1CH2
4
30
VSSA
PTF1/RGPIO9/FTM1CH3
5
29
VDDA
28
PTD1/AD1P9/ACMP1-
44-Pin LQFP
PTF4/RGPIO12/FTM2CH0
6
PTF5/RGPIO13/FTM2CH1
7
27
PTD0/AD1P8/ACMP1+
PTE0/RGPIO0/TxD1
8
26
PTB3/AD1P3
PTE1/RGPIO1/RxD1
9
25
PTB2/AD1P2
PTE2/RGPIO2/FTM1CH0
10
24
PTB1/TPM3CH1/AD1P1
PTE3/RGPIO3/FTM1CH1 11
13
14
15
16
17
18
19
20
•PTA0/TxCAN
PTG2/KBI1P2
PTG1/KBI1P1
PTG0/KBI1P0
VDD
VSS
PTE7/RGPIO7/SPSCK1
PTE6/RGPIO6/MOSI1
PTE5/RGPIO5/MISO1
•PTA1/RxCAN
22
12
PTE4/RGPIO4/SS1
23 PTB0/TPM3CH0/AD1P0
21
• TxCAN and RxCAN are not available in the
members that do not support CAN
Figure 4. MCF51AC256 Series ColdFire Microcontroller 44-Pin LQFP
Table 4 shows the package pin assignments.
Table 4. Pin Availability by Package Pin-Count
Pin Number
Lowest Highest
80
64
44
Port Pin
Alt 1
Alt 2
1
1
1
PTC4
SS2
2
2
2
IRQ
TPMCLK1
3
3
3
RESET
4
4
4
PTF0
RGPIO8
FTM1CH2
5
5
5
PTF1
RGPIO9
FTM1CH3
6
6
—
PTF2
RGPIO10
FTM1CH4
7
7
—
PTF3
RGPIO11
FTM1CH5
Alt 3
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
14
Freescale Semiconductor
MCF51AC256 Family Configurations
Table 4. Pin Availability by Package Pin-Count (continued)
Pin Number
Lowest Highest
80
64
44
Port Pin
Alt 1
Alt 2
8
8
6
PTF4
RGPIO12
FTM2CH0
9
9
—
PTC6
FTM2FLT
10
10
—
PTF7
RGPIO15
11
11
7
PTF5
RGPIO13
FTM2CH1
12
12
—
PTF6
RGPIO14
FTM1FLT
13
—
—
PTJ0
PST0
14
—
—
PTJ1
PST1
15
—
—
PTJ2
PST2
16
—
—
PTJ3
PST3
17
13
8
PTE0
RGPIO0
TxD1
18
14
9
PTE1
RGPIO1
RxD1
19
15
10
PTE2
RGPIO2
FTM1CH0
20
16
11
PTE3
RGPIO3
FTM1CH1
21
17
12
PTE4
RGPIO4
SS1
22
18
13
PTE5
RGPIO5
MISO1
23
19
14
PTE6
RGPIO6
MOSI1
24
20
15
PTE7
RGPIO7
SPSCK1
25
21
16
VSS
26
22
17
VDD
27
—
—
PTJ4
DDATA0
28
—
—
PTJ5
DDATA1
29
—
—
PTJ6
DDATA2
30
—
—
PTJ7
DDATA3
31
23
18
PTG0
KBI1P0
32
24
19
PTG1
KBI1P1
33
25
20
PTG2
KBI1P2
34
26
21
PTA0
TxCAN2
35
27
22
PTA1
RxCAN3
36
28
—
PTA2
37
29
—
PTA3
ACMP2O
38
30
—
PTA4
ACMP2–
Alt 3
39
31
—
PTA5
ACMP2+
40
32
—
PTA6
AD1P16
41
33
—
PTA7
AD1P17
42
—
—
PTH0
FTM2CH2
AD1P20
43
—
—
PTH1
FTM2CH3
PSTCLK0
AD1P21
44
—
—
PTH2
FTM2CH4
PSTCLK1
AD1P22
AD1P23
45
—
—
PTH3
FTM2CH5
BKPT
46
34
23
PTB0
TPM3CH0
AD1P0
AD1P1
47
35
24
PTB1
TPM3CH1
48
36
25
PTB2
AD1P2
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
15
MCF51AC256 Family Configurations
Table 4. Pin Availability by Package Pin-Count (continued)
Pin Number
Lowest Highest
80
64
44
Port Pin
Alt 1
Alt 2
49
37
26
PTB3
AD1P3
50
38
—
PTB4
AD1P4
51
39
—
PTB5
AD1P5
52
40
—
PTB6
AD1P6
53
41
—
PTB7
AD1P7
54
42
27
PTD0
AD1P8
ACMP1+
55
43
28
PTD1
AD1P9
ACMP1–
56
44
29
VDDA
57
45
30
VSSA
58
46
31
PTD2
KBI1P5
AD1P10
59
47
32
PTD3
KBI1P6
AD1P11
60
48
33
PTG3
KBI1P3
AD1P18
61
49
—
PTG4
KBI1P4
AD1P19
62
50
—
PTD4
FTM2CLK
AD1P12
63
51
—
PTD5
AD1P13
64
52
—
PTD6
FTM1CLK
AD1P14
65
53
—
PTD7
KBI1P7
AD1P15
66
54
34
VREFH
67
55
35
VREFL
68
56
36
BKGD
MS
69
57
37
PTG5
XTAL
EXTAL
70
58
38
PTG6
71
59
39
VSS
72
—
—
VDD
73
60
40
PTC0
74
61
41
PTC1
SDA1
75
—
—
PTH4
SPCK2
76
—
—
PTH5
MOSI2
77
—
—
PTH6
MISO2
Alt 3
ACMP1O
SCL1
78
62
42
PTC2
MCLK
79
63
43
PTC3
TxD2
80
64
44
PTC5
RxD2
1
TPMCLK, FTM1CLK, and FTM2CLK options are configured via
software; out of reset, FTM1CLK, FTM2CLK, and TPMCLK are
available to FTM1, FTM2, and TPM3 respectively.
2 TxCAN is available in the member that supports CAN.
3
RxCAN is available in the member that supports CAN.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
16
Freescale Semiconductor
Electrical Characteristics
2
Electrical Characteristics
This section contains electrical specification tables and reference timing diagrams for the MCF51AC256
microcontroller, including detailed information on power considerations, DC/AC electrical characteristics,
and AC timing specifications.
The electrical specifications are preliminary and are from previous designs or design simulations. These
specifications may not be fully tested or guaranteed at this early stage of the product life cycle. These
specifications will, however, be met for production silicon. Finalized specifications will be published after
complete characterization and device qualifications have been completed.
NOTE
The parameters specified in this data sheet supersede any values found in
the module specifications.
2.1
Parameter Classification
The electrical parameters shown in this supplement are guaranteed by various methods. To give the
customer a better understanding the following classification is used and the parameters are tagged
accordingly in the tables where appropriate:
Table 5. Parameter Classifications
P
Those parameters are guaranteed during production testing on each individual device.
C
Those parameters are achieved by the design characterization by measuring a statistically relevant
sample size across process variations.
T
Those parameters are achieved by design characterization on a small sample size from typical devices
under typical conditions unless otherwise noted. All values shown in the typical column are within this
category.
D
Those parameters are derived mainly from simulations.
NOTE
The classification is shown in the column labeled “C” in the parameter
tables where appropriate.
2.2
Absolute Maximum Ratings
Absolute maximum ratings are stress ratings only, and functional operation at the maxima is not
guaranteed. Stress beyond the limits specified in Table 6 may affect device reliability or cause permanent
damage to the device. For functional operating conditions, refer to the remaining tables in this section.
This device contains circuitry protecting against damage due to high static voltage or electrical fields;
however, it is advised that normal precautions be taken to avoid application of any voltages higher than
maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused
inputs are tied to an appropriate logic voltage level (for instance, either VSS or VDD).
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
17
Electrical Characteristics
Table 6. Absolute Maximum Ratings
Rating
Symbol
Value
Unit
Supply voltage
VDD
–0.3 to 5.8
V
Input voltage
VIn
–0.3 to VDD + 0.3
V
Instantaneous maximum current
Single pin limit (applies to all port pins)1, 2, 3
ID
25
mA
Maximum current into VDD
IDD
120
mA
Storage temperature
Tstg
–55 to 150
C
1
Input must be current limited to the value specified. To determine the value of the required
current-limiting resistor, calculate resistance values for positive (VDD) and negative (VSS) clamp
voltages, then use the larger of the two resistance values.
2
All functional non-supply pins are internally clamped to VSS and VDD.
3
Power supply must maintain regulation within operating VDD range during instantaneous and
operating maximum current conditions. If positive injection current (VIn > VDD) is greater than
IDD, the injection current may flow out of VDD and could result in external power supply going
out of regulation. Ensure external VDD load will shunt current greater than maximum injection
current. This will be the greatest risk when the MCU is not consuming power. Examples are: if
no system clock is present, or if the clock rate is very low which would reduce overall power
consumption.
2.3
Thermal Characteristics
This section provides information about operating temperature range, power dissipation, and package
thermal resistance. Power dissipation on I/O pins is usually small compared to the power dissipation in
on-chip logic and it is user-determined rather than being controlled by the MCU design. In order to take
PI/O into account in power calculations, determine the difference between actual pin voltage and VSS or
VDD and multiply by the pin current for each I/O pin. Except in cases of unusually high pin current (heavy
loads), the difference between pin voltage and VSS or VDD will be very small.
Table 7. Thermal Characteristics
Rating
Symbol
Value
Unit
Operating temperature range (packaged)
TA
–40 to 105
C
Maximum junction temperature
TJ
150
C
Thermal resistance 1,2,3,4
80-pin LQFP
51
38
1s
2s2p
64-pin LQFP
1s
2s2p
JA
59
41
C/W
64-pin QFP
1s
2s2p
50
36
44-pin LQFP
1s
2s2p
67
45
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
18
Freescale Semiconductor
Electrical Characteristics
1
Junction temperature is a function of die size, on-chip power dissipation, package thermal
resistance, mounting site (board) temperature, ambient temperature, air flow, power dissipation
of other components on the board, and board thermal resistance
2
Junction to Ambient Natural Convection
3
1s — Single layer board, one signal layer
4 2s2p — Four layer board, 2 signal and 2 power layers
The average chip-junction temperature (TJ) in C can be obtained from:
TJ = TA + (PD JA)
Eqn. 1
where:
TA = Ambient temperature, C
JA = Package thermal resistance, junction-to-ambient, C/W
PD = Pint PI/O
Pint = IDD VDD, Watts — chip internal power
PI/O = Power dissipation on input and output pins — user determined
For most applications, PI/O Pint and can be neglected. An approximate relationship between PD and TJ
(if PI/O is neglected) is:
PD = K (TJ + 273C)
Eqn. 2
Solving Equation 1 and Equation 2 for K gives:
K = PD (TA + 273C) + JA (PD)2
Eqn. 3
where K is a constant pertaining to the particular part. K can be determined from Equation 3 by measuring
PD (at equilibrium) for a known TA. Using this value of K, the values of PD and TJ can be obtained by
solving Equation 1 and Equation 2 iteratively for any value of TA.
2.4
Electrostatic Discharge (ESD) Protection Characteristics
Although damage from static discharge is much less common on these devices than on early CMOS
circuits, normal handling precautions should be used to avoid exposure to static discharge. Qualification
tests are performed to ensure that these devices can withstand exposure to reasonable levels of static
without suffering any permanent damage.
All ESD testing is in conformity with CDF-AEC-Q00 Stress Test Qualification for Automotive Grade
Integrated Circuits. (http://www.aecouncil.com/) This device was qualified to AEC-Q100 Rev E.
A device is considered to have failed if, after exposure to ESD pulses, the device no longer meets the
device specification requirements. Complete dc parametric and functional testing is performed per the
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
19
Electrical Characteristics
applicable device specification at room temperature followed by hot temperature, unless specified
otherwise in the device specification.
Table 8. ESD and Latch-up Test Conditions
Model
Human body
Charge device
model
Latch-up
Description
Symbol
Value
Unit
Series resistance
R1
1500
Storage capacitance
C
100
pF
Number of pulse per pin
—
3
Series resistance
R1
0
Storage capacitance
C
0
pF
Number of pulse per pin
—
3
—
Minimum input voltage limit
—
–2.5
V
Maximum input voltage limit
—
7.5
V
Table 9. ESD and Latch-Up Protection Characteristics
Num
2.5
Rating
Symbol
Min
Max
Unit
1
Human body model (HBM)
VHBM
±2000
—
V
2
Charge device model (CDM)
VCDM
±500
—
V
3
Latch-up current at TA = 85 C
ILAT
±100
—
mA
DC Characteristics
This section includes information about power supply requirements, I/O pin characteristics, and power
supply current in various operating modes.
Table 10. DC Characteristics
Num C
1
2
Parameter
Symbol
— Operating voltage
P
Output high voltage — Low drive (PTxDSn = 0)
5 V, ILoad = –4 mA
3 V, ILoad = –2 mA
5 V, ILoad = –2 mA
3 V, ILoad = –1 mA
Output high voltage — High drive (PTxDSn = 1)
5 V, ILoad = –15 mA
3 V, ILoad = –8 mA
5 V, ILoad = –8 mA
3 V, ILoad = –4 mA
VOH
Min
Typical1
Max
Unit
2.7
—
5.5
V
VDD – 1.5
VDD – 1.5
VDD – 0.8
VDD – 0.8
—
—
—
—
—
—
—
—
VDD – 1.5
VDD – 1.5
VDD – 0.8
VDD – 0.8
—
—
—
—
—
—
—
—
V
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
20
Freescale Semiconductor
Electrical Characteristics
Table 10. DC Characteristics (continued)
Num C
3
P
Parameter
Symbol
Output low voltage — Low Drive (PTxDSn = 0)
5 V, ILoad = 4 mA
3 V, ILoad = 2 mA
5 V, ILoad = 2 mA
3 V, ILoad = 1 mA
Output low voltage — High Drive (PTxDSn = 1)
5 V, ILoad = 15 mA
3 V, ILoad = 8 mA
5 V, ILoad = 8 mA
3 V, ILoad = 4 mA
Min
—
Typical1
Max
—
1.5
1.5
0.8
0.8
VOL
—
—
1.5
1.5
0.8
0.8
Unit
V
Output high current — Max total IOH for all ports
5V
3V
IOHT
—
—
100
60
mA
5V
3V
IOLT
—
—
100
60
mA
P Input high voltage; all digital inputs
VIH
0.65 VDD
—
—
V
7
P Input low voltage; all digital inputs
VIL
—
—
0.35 VDD
V
8
D Input hysteresis; all digital inputs
Vhys
0.06 VDD
—
—
mV
9
P Input leakage current; input only pins2
|IIn|
—
0.1
1
A
|IOZ|
—
0.1
1
A
RPU
20
45
65
k
4
C
5
C
6
Output low current — Max total IOL for all ports
10
11
P High impedance (off-state) leakage current
P Internal pullup resistors
2
3
4
12
P Internal pulldown resistors
RPD
20
45
65
k
13
C Input capacitance; all non-supply pins
CIn
—
—
8
pF
14
P POR rearm voltage
VPOR
0.9
1.4
2.0
V
15
D POR rearm time
tPOR
10
—
—
s
4.2
4.27
4.35
4.4
4.5
4.6
2.48
2.5
2.68
2.7
2.7
2.72
4.2
4.27
4.4
4.45
4.5
4.6
2.48
2.5
2.68
2.7
2.7
2.72
Vhys
—
100
60
—
VRAM
—
0.6
1.0
16
17
18
P
P
P
Low-voltage detection threshold —
high range
VDD falling
VDD rising
Low-voltage detection threshold —
low range
VDD falling
VDD rising
Low-voltage warning threshold —
high range
VDD falling
VDD rising
Low-voltage warning threshold
low range
19
P
20
T
21
D RAM retention voltage
VDD falling
VDD rising
VLVDH
VLVDL
VLVWH
VLVWL
V
V
V
V
Low-voltage inhibit reset/recover hysteresis
5V
3V
mV
V
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
21
Electrical Characteristics
Table 10. DC Characteristics (continued)
Num C
Parameter
DC injection
current5 6 7 8
Symbol
2
3
4
5
6
7
8
Max
Unit
0
0
—
2
–0.2
mA
D DC injection current (Total MCU limit, includes sum of all
stressed pins)
VIN >VDD
VIN VDD) is greater than IDD, the injection current may flow out of VDD and could result
in external power supply going out of regulation. Ensure external VDD load will shunt current greater than maximum injection
current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is present, or
if clock rate is very low (which would reduce overall power consumption).
All functional non-supply pins are internally clamped to VSS and VDD.
Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate
resistance values for positive and negative clamp voltages, then use the larger of the two values.
The RESET pin does not have a clamp diode to VDD. Do not drive this pin above VDD.
–6.0E-3
VDD–VOH (V)
Average of IOH
–5.0E-3
-40C
25C
–4.0E-3
105C
IOH (A)
1
Typical1
(single pin limit)
VIN >VDD
VIN 4MHz
fADCK < 4MHz
C
8
C
Analog source
resistance
9
D
RAS
8-bit mode (all valid
fADCK)
C
D
10-bit mode
fADCK > 4MHz
fADCK < 4MHz
ADC
conversion
clock
frequency
High speed
(ADLPC = 0)
Low power
(ADLPC = 1)
fADCK
k
Comment
External
to MCU
MHz
0.4
—
4.0
Typical values assume VDDA = 5.0 V, Temp = 25 C, fADCK = 1.0 MHz unless otherwise stated. Typical values are for reference
only and are not tested in production.
2 DC potential difference.
1
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
28
Freescale Semiconductor
Electrical Characteristics
SIMPLIFIED
INPUT PIN EQUIVALENT
CIRCUIT
RAS
CAS
+
–
SIMPLIFIED
CHANNEL SELECT
CIRCUIT
Pad
leakage
due to
input
protection
ZAS
VAS
ZADIN
RADIN
ADC SAR
ENGINE
+
VADIN
–
RADIN
INPUT PIN
RADIN
INPUT PIN
RADIN
INPUT PIN
CADIN
Figure 10. ADC Input Impedance Equivalency Diagram
Table 14. 5 Volt 12-bit ADC Characteristics (VREFH = VDDA, VREFL = VSSA)
Symb
Min
Typical1
Max
Unit
T
Supply current
ADLPC = 1
ADLSMP = 1
ADCO = 1
IDDA
—
133
—
A
T
Supply current
ADLPC = 1
ADLSM = 0
ADCO = 1
IDDA
—
218
—
A
T
Supply current
ADLPC = 0
ADLSMP = 1
ADCO = 1
IDDA
—
327
—
A
4
D
Supply current
ADLPC = 0
ADLSMP = 0
ADCO = 1
IDDA
—
0.582
1
mA
5
T
Supply current
Stop, reset, module off
IDDA
—
0.011
1
A
2
3.3
5
P
ADC
asynchronous
clock source
High speed (ADLPC = 0)
6
Num
1
2
3
C
Characteristic
Conditions
Low power (ADLPC = 1)
fADACK
MHz
1.25
2
3.3
Comment
tADACK =
1/fADACK
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
29
Electrical Characteristics
Table 14. 5 Volt 12-bit ADC Characteristics (VREFH = VDDA, VREFL = VSSA) (continued)
Min
Typical1
Max
—
20
—
—
40
—
—
3.5
—
—
23.5
—
—
3.0
—
—
1
2.5
8-bit mode
—
0.5
1.0
12-bit mode
—
1.75
—
—
0.5
1.0
Num
C
Characteristic
Conditions
P
Conversion
time (including
sample time)
Short sample (ADLSMP = 0)
7
Long sample (ADLSMP = 1)
Symb
tADC
Short sample (ADLSMP = 0)
8
T
Sample time
Long sample (ADLSMP = 1)
T
9
P
T
Total
unadjusted
error
T
10
11
12
13
P
Differential
non-linearity
15
12-bit mode
10-bit mode
10-bit mode3
ETUE
DNL
8-bit mode3
—
0.3
0.5
T
12-bit mode
—
1.5
—
—
0.5
1.0
T
Integral
non-linearity
10-bit mode
INL
T
8-bit mode
—
0.3
0.5
T
12-bit mode
—
1.5
—
—
0.5
1.5
P
Zero-scale
error
10-bit mode
EZS
T
8-bit mode
—
0.5
0.5
T
12-bit mode
—
1
—
—
0.5
1
8-bit mode
—
0.5
0.5
12-bit mode
—
–1 to 0
—
—
—
0.5
8-bit mode
—
—
0.5
12-bit mode
—
1
—
—
0.2
2.5
—
0.1
1
—
1.396
—
—
3.266
—
—
3.638
—
P
Full-scale error
D
D
Quantization
error
Input leakage
error
10-bit mode
10-bit mode
10-bit mode
EFS
EQ
EIL
8-bit mode
16
D
Temp sensor
voltage
17
D
Temp sensor
slope
25C
VTEMP25
–40 C–25 C
25 C–85 C
m
Comment
ADCK
cycles
See
Table 10
for
conversion
time
variances
ADCK
cycles
T
T
14
tADS
Unit
LSB2
Includes
quantizatio
n
LSB2
LSB2
LSB2
VADIN =
VSSA
LSB2
VADIN =
VDDA
LSB2
LSB2
Pad
leakage4 *
RAS
V
mV/C
Typical values assume VDDA = 5.0 V, Temp = 25 C, fADCK = 1.0 MHz unless otherwise stated. Typical values are for reference only
and are not tested in production.
2 1 LSB = (V
N
REFH – VREFL)/2 .
1
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
30
Freescale Semiconductor
Electrical Characteristics
3
4
Monotonicity and No-Missing-Codes guaranteed in 10-bit and 8-bit modes
Based on input pad leakage current. Refer to pad electricals.
2.9
External Oscillator (XOSC) Characteristics
Table 15. Oscillator Electrical Specifications (Temperature Range = –40 to 105 C Ambient)
C
Rating
Symbol
Min
Typical1
Max
Unit
1
C
Oscillator crystal or resonator (EREFS = 1, ERCLKEN = 1)
Low range (RANGE = 0)
High range (RANGE = 1) FEE or FBE mode2
High range (RANGE = 1) PEE or PBE mode3
High range (RANGE = 1, HGO = 1) BLPE mode
High range (RANGE = 1, HGO = 0) BLPE mode
flo
fhi-fll
fhi-pll
fhi-hgo
fhi-lp
32
1
1
1
1
—
—
—
—
—
38.4
5
16
16
8
kHz
MHz
MHz
MHz
MHz
2
— Load capacitors
3
—
Num
C1
C2
See crystal or resonator
manufacturer’s recommendation.
Feedback resistor
Low range (32 kHz to 38.4 kHz)
High range (1 MHz to 16 MHz)
RF
10
1
M
Series resistor
4
5
6
Low range, low gain (RANGE = 0, HGO = 0)
Low range, high gain (RANGE = 0, HGO = 1)
High range, low gain (RANGE = 1, HGO = 0)
High range, high gain (RANGE = 1, HGO = 1)
8 MHz
MHz
MHz
—
T
T
Crystal start-up time 4
Low range, low gain (RANGE = 0, HGO = 0)
Low range, high gain (RANGE = 0, HGO = 1)
High range, low gain (RANGE = 1, HGO = 0)5
High range, high gain (RANGE = 1, HGO = 1)5
Square wave input clock frequency (EREFS = 0, ERCLKEN =
1)
FEE or FBE mode 2
PEE or PBE mode 3
BLPE mode
RS
t
t
t
CSTL-LP
CSTL-HGO
t
CSTH-LP
CSTH-HGO
fextal
—
—
—
0
100
0
—
—
—
—
—
—
0
0
0
0
10
20
—
—
—
—
200
400
5
15
—
—
—
—
0.03125
1
0
—
—
—
5
16
40
k
ms
MHz
Data in Typical column was characterized at 5.0 V, 25 C or is typical recommended value.
When MCG is configured for FEE or FBE mode, input clock source must be divisible using RDIV to within the range of
31.25 kHz to 39.0625 kHz.
3 When MCG is configured for PEE or PBE mode, input clock source must be divisible using RDIV to within the range of 1 MHz
to 2 MHz.
4 This parameter is characterized and not tested on each device. Proper PC board layout procedures must be followed to
achieve specifications.
5
4 MHz crystal
1
2
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
31
Electrical Characteristics
MCU
EXTAL
XTAL
RS
RF
C1
2.10
Crystal or Resonator
C2
MCG Specifications
Table 16. MCG Frequency Specifications (Temperature Range = –40 to 105 C Ambient)
Num C
Rating
Internal reference frequency — factory trimmed at
VDD = 5 V and temperature = 25 C
Symbol
Min
Typical1
Max
Unit
fint_ft
—
32.768
—
kHz
31.25
—
39.0625
kHz
—
60
100
s
16
—
20
1
C
2
C Average internal reference frequency — untrimmed
fint_ut
T Internal reference startup time
tirefst
3
Low range (DRS=00)
C
C
DCO output frequency
range — untrimmed 2
32
—
40
48
—
60
—
16.82
—
—
33.69
—
—
50.48
—
fdco_res_t
—
0.1
0.2
%fdco
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (not using FTRIM)
fdco_res_t
—
0.2
0.4
%fdco
D
Total deviation of trimmed DCO output frequency over
voltage and temperature
fdco_t
—
0.5
–1.0
2
%fdco
9
D
Total deviation of trimmed DCO output frequency over
fixed voltage and temperature range of 0–70 C
fdco_t
—
0.5
1
%fdco
10
D FLL acquisition time3
tfll_acquire
—
—
1
ms
11
D PLL acquisition
time4
tpll_acquire
—
—
1
ms
12
Long term jitter of DCO output clock (averaged over
D
2ms interval) 5
CJitter
—
0.02
0.2
%fdco
13
D VCO operating frequency
fvco
7.0
—
55.0
MHz
4
Mid range (DRS=01)
C
High range (DRS=10)
Low range (DRS=00)
5
P DCO output frequency2
P reference =32768Hz
P and DMX32 = 1
6
Resolution of trimmed DCO output frequency at fixed
D
voltage and temperature (using FTRIM)
7
D
8
Mid range (DRS=01)
fdco_ut
fdco_DMX32
High range (DRS=10)
16
D Jitter of PLL output clock measured over 625
17
D Lock entry frequency tolerance 7
ns6
6
MHz
MHz
fpll_jitter_625ns
—
0.566
—
%fpll
Dlock
1.49
—
2.98
%
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
32
Freescale Semiconductor
Electrical Characteristics
Table 16. MCG Frequency Specifications (continued)(Temperature Range = –40 to 105 C Ambient)
Num C
18
1
2
3
4
5
6
7
8
Rating
D Lock exit frequency tolerance
8
Symbol
Min
Typical1
Dunl
4.47
Max
Unit
—
5.97
%
tfll_acquire+
1075(1/fint_t)
s
19
D Lock time — FLL
tfll_lock
—
—
20
D Lock time — PLL
tpll_lock
—
—
21
Loss of external clock minimum frequency —
D RANGE = 0
floc_low
(3/5) fint
—
tpll_acquire+
1075(1/fpll_ref)
—
s
kHz
Data in Typical column was characterized at 5.0 V, 25 C or is typical recommended value.
The resulting bus clock frequency must not exceed the maximum specified bus clock frequency of the device.
This specification applies when the FLL reference source or reference divider is changed, trim value changed or changing from
FLL disabled (BLPE, BLPI) to FLL enabled (FEI, FEE, FBE, FBI). If a crystal/resonator is being used as the reference, this
specification assumes it is already running.
This specification applies when the PLL VCO divider or reference divider is changed, or changing from PLL disabled (BLPE,
BLPI) to PLL enabled (PBE, PEE). If a crystal/resonator is being used as the reference, this specification assumes it is already
running.
Jitter is the average deviation from the programmed frequency measured over the specified interval at maximum fBUS.
Measurements are made with the device powered by filtered supplies and clocked by a stable external clock signal. Noise
injected into the FLL circuitry via VDD and VSS and variation in crystal oscillator frequency increase the CJitter percentage for
a given interval.
625 ns represents 5 time quanta for CAN applications, under worst case conditions of 8 MHz CAN bus clock, 1 Mbps CAN bus
speed, and 8 time quanta per bit for bit time settings. 5 time quanta is the minimum time between a synchronization edge and
the sample point of a bit using 8 time quanta per bit.
Below Dlock minimum, the MCG enters lock. Above Dlock maximum, the MCG will not enter lock. But if the MCG is already in
lock, then the MCG may stay in lock.
Below Dunl minimum, the MCG will not exit lock if already in lock. Above Dunl maximum, the MCG is guaranteed to exit lock.
o
2.11
AC Characteristics
This section describes ac timing characteristics for each peripheral system.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
33
Electrical Characteristics
2.11.1
Control Timing
Table 17. Control Timing
Num
C
1
D
2
D
Symbol
Min
Typical1
Max
Unit
Bus frequency (tcyc = 1/fBus)
fBus
dc
—
24
MHz
Internal low-power oscillator period
tLPO
800
—
1500
s
Parameter
2
3
D
External reset pulse width
(tcyc = 1/fSelf_reset)
textrst
100
—
—
ns
4
D
Reset low drive
trstdrv
66 tcyc
—
—
ns
5
D
Active background debug mode latch setup time
tMSSU
500
—
—
ns
6
D
Active background debug mode latch hold time
tMSH
100
—
—
ns
7
D
Asynchronous path2
Synchronous path3
tILIH, tIHIL
100
1.5 tcyc
—
—
ns
8
D
Asynchronous path2
Synchronous path3
tILIH, tIHIL
100
1.5 tcyc
—
—
ns
D
Port rise and fall time (load = 50 pF)4
Slew rate control disabled (PTxSE = 0), Low Drive
Slew rate control enabled (PTxSE = 1), Low Drive
Slew rate control disabled (PTxSE = 0), Low Drive
Slew rate control enabled (PTxSE = 1), Low Drive
tRise, tFall
—
—
—
—
11
35
40
75
—
ns
IRQ pulse width
KBIPx pulse width
9
Typical values are based on characterization data at VDD = 5.0 V, 25 C unless otherwise stated.
This is the shortest pulse that is guaranteed to be recognized as a reset pin request. Shorter pulses are not guaranteed to
override reset requests from internal sources.
3 This is the minimum pulse width that is guaranteed to pass through the pin synchronization circuitry. Shorter pulses may or
may not be recognized. In stop mode, the synchronizer is bypassed so shorter pulses can be recognized in that case.
4 Timing is shown with respect to 20% V
DD and 80% VDD levels. Temperature range –40 C to 105 C.
1
2
textrst
RESET PIN
Figure 11. Reset Timing
tIHIL
IRQ/KBIPx
IRQ/KBIPx
tILIH
Figure 12. IRQ/KBIPx Timing
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
34
Freescale Semiconductor
Electrical Characteristics
2.11.2
Timer (TPM/FTM) Module Timing
Synchronizer circuits determine the shortest input pulses that can be recognized or the fastest clock that
can be used as the optional external source to the timer counter. These synchronizers operate from the
current bus rate clock.
Table 18. TPM/FTM Input Timing
NUM
C
1
—
2
Function
Symbol
Min
Max
Unit
External clock frequency
fTPMext
DC
fBus/4
MHz
—
External clock period
tTPMext
4
—
tcyc
3
D
External clock high time
tclkh
1.5
—
tcyc
4
D
External clock low time
tclkl
1.5
—
tcyc
5
D
Input capture pulse width
tICPW
1.5
—
tcyc
tTPMext
tclkh
TPMxCLK
tclkl
Figure 13. Timer External Clock
tICPW
TPMxCHn
TPMxCHn
tICPW
Figure 14. Timer Input Capture Pulse
2.11.3
MSCAN
Table 19. MSCAN Wake-Up Pulse Characteristics
1
Num
C
1
D
2
D
Symbol
Min
Typical1
Max
Unit
MSCAN wake-up dominant pulse filtered
tWUP
—
—
2
s
MSCAN wake-up dominant pulse pass
tWUP
5
—
5
s
Parameter
Typical values are based on characterization data at VDD = 5.0 V, 25 C unless otherwise stated.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
35
Electrical Characteristics
2.12
SPI Characteristics
Table 20 and Figure 15 through Figure 18 describe the timing requirements for the SPI system.
Table 20. SPI Timing
No.
C
Function
Symbol
Min
Max
Unit
—
D
Operating frequency
Master
Slave
fop
fBus/2048
0
fBus/2
fBus/4
Hz
1
D
SPSCK period
Master
Slave
tSPSCK
2
4
2048
—
tcyc
tcyc
2
D
Enable lead time
Master
Slave
tLead
12
1
—
—
tSPSCK
tcyc
3
D
Enable lag time
Master
Slave
tLag
12
1
—
—
tSPSCK
tcyc
4
D
Clock (SPSCK) high or low time
Master
Slave
tWSPSCK
tcyc –30
tcyc – 30
1024 tcyc
—
ns
ns
5
D
Data setup time (inputs)
Master
Slave
tSU
15
15
—
—
ns
ns
6
D
Data hold time (inputs)
Master
Slave
tHI
0
25
—
—
ns
ns
7
D
Slave access time
ta
—
1
tcyc
8
D
Slave MISO disable time
tdis
—
1
tcyc
9
D
Data valid (after SPSCK edge)
Master
Slave
tv
—
—
25
25
ns
ns
10
D
Data hold time (outputs)
Master
Slave
tHO
0
0
—
—
ns
ns
11
D
Rise time
Input
Output
tRI
tRO
—
—
tcyc – 25
25
ns
ns
12
D
Fall time
Input
Output
tFI
tFO
—
—
tcyc – 25
25
ns
ns
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
36
Freescale Semiconductor
Electrical Characteristics
SS1
(OUTPUT)
11
1
2
SPSCK
(CPOL = 0)
(OUTPUT)
3
4
4
12
SPSCK
(CPOL = 1)
(OUTPUT)
5
MISO
(INPUT)
6
MSB IN2
BIT 6 . . . 1
9
MOSI
(OUTPUT)
LSB IN
10
9
MSB OUT2
BIT 6 . . . 1
LSB OUT
NOTES:
1. SS output mode (DDS7 = 1, SSOE = 1).
2. LSBF = 0. For LSBF = 1, bit order is LSB, bit 1, ..., bit 6, MSB.
Figure 15. SPI Master Timing (CPHA = 0)
SS(1)
(OUTPUT)
1
2
12
11
11
12
3
SPSCK
(CPOL = 0)
(OUTPUT)
4
4
SPSCK
(CPOL = 1)
(OUTPUT)
5
MISO
(INPUT)
6
MSB IN(2)
LSB IN
10
9
MOSI
(OUTPUT) PORT DATA
BIT 6 . . . 1
MASTER MSB OUT(2)
BIT 6 . . . 1
MASTER LSB OUT
PORT DATA
NOTES:
1. SS output mode (DDS7 = 1, SSOE = 1).
2. LSBF = 0. For LSBF = 1, bit order is LSB, bit 1, ..., bit 6, MSB.
Figure 16. SPI Master Timing (CPHA =1)
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
37
Electrical Characteristics
SS
(INPUT)
1
12
11
11
12
3
SPSCK
(CPOL = 0)
(INPUT)
2
4
4
SPSCK
(CPOL = 1)
(INPUT)
8
7
MISO
(OUTPUT)
SLAVE LSB OUT
SEE
NOTE
6
5
MOSI
(INPUT)
BIT 6 . . . 1
MSB OUT
SLAVE
10
10
9
BIT 6 . . . 1
MSB IN
LSB IN
NOTE:
1. Not defined but normally MSB of character just received
Figure 17. SPI Slave Timing (CPHA = 0)
SS
(INPUT)
1
3
2
SPSCK
(CPOL = 0)
(INPUT)
4
SPSCK
(CPOL = 1)
(INPUT)
4
SEE
NOTE
7
MOSI
(INPUT)
SLAVE
11
11
12
10
9
MISO
(OUTPUT)
12
MSB OUT
5
8
BIT 6 . . . 1
SLAVE LSB OUT
6
MSB IN
BIT 6 . . . 1
LSB IN
NOTE:
1. Not defined but normally LSB of character just received
Figure 18. SPI Slave Timing (CPHA = 1)
2.13
Flash Specifications
This section provides details about program/erase times and program-erase endurance for the Flash
memory.
Program and erase operations do not require any special power sources other than the normal VDD supply.
For more detailed information about program/erase operations, see Chapter 4, “Memory.”
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
38
Freescale Semiconductor
Electrical Characteristics
Table 21. Flash Characteristics
Symbol
Min
Typical1
Max
Unit
Supply voltage for program/erase
Vprog/erase
2.7
—
5.5
V
—
Supply voltage for read operation
VRead
2.7
—
5.5
V
3
—
Internal FCLK frequency2
fFCLK
150
—
200
kHz
4
—
Internal FCLK period (1/FCLK)
tFcyc
5
—
6.67
s
5
—
Byte program time (random location)2
tprog
9
tFcyc
6
—
Byte program time (burst mode)2
tBurst
4
tFcyc
7
—
Page erase time3
tPage
4000
tFcyc
8
—
Mass erase time2
tMass
20,000
tFcyc
9
C
Program/erase endurance4
TL to TH = –40 C to 105 C
T = 25 C
10
C
Data retention5
Num
C
1
—
2
Characteristic
—
10,000
—
—
100,000
—
—
cycles
tD_ret
15
100
—
years
Typical values are based on characterization data at VDD = 5.0 V, 25 C unless otherwise stated.
The frequency of this clock is controlled by a software setting.
3 These values are hardware state machine controlled. User code does not need to count cycles. This information
supplied for calculating approximate time to program and erase.
4 Typical endurance for flash was evaluated for this product family on the 9S12Dx64. For additional information on
how Freescale Semiconductor defines typical endurance, please refer to Engineering Bulletin EB619/D, Typical
Endurance for Nonvolatile Memory.
5
Typical data retention values are based on intrinsic capability of the technology measured at high temperature and
de-rated to 25C using the Arrhenius equation. For additional information on how Freescale Semiconductor defines
typical data retention, please refer to Engineering Bulletin EB618/D, Typical Data Retention for Nonvolatile Memory.
1
2
2.14
EMC Performance
Electromagnetic compatibility (EMC) performance is highly dependant on the environment in which the
MCU resides. Board design and layout, circuit topology choices, location and characteristics of external
components as well as MCU software operation all play a significant role in EMC performance. The
system designer should consult Freescale applications notes such as AN2321, AN1050, AN1263,
AN2764, and AN1259 for advice and guidance specifically targeted at optimizing EMC performance.
2.14.1
Radiated Emissions
Microcontroller radiated RF emissions are measured from 150 kHz to 1 GHz using the TEM/GTEM Cell
method in accordance with the IEC 61967-2 and SAE J1752/3 standards. The measurement is performed
with the microcontroller installed on a custom EMC evaluation board while running specialized EMC test
software. The radiated emissions from the microcontroller are measured in a TEM cell in two package
orientations (North and East). For more detailed information concerning the evaluation results, conditions
and setup, please refer to the EMC Evaluation Report for this device.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
39
Mechanical Outline Drawings
3
Mechanical Outline Drawings
Table 22 provides the available package types and their document numbers. The latest package
outline/mechanical drawings are available on the MCF51AC256 Series Product Summary pages at
http://www.freescale.com.
To view the latest drawing, either:
• Click on the appropriate link in Table 22, or
• Open a browser to the FreescaleÆ website (http://www.freescale.com), and enter the appropriate
document number (from Table 22) in the “Enter Keyword” search box at the top of the page.
Table 22. Package Information
Pin Count
Type
Document No.
80
LQFP
98ARL10530D
64
LQFP
98ASS23234W
64
QFP
98ASB42844B
44
LQFP
98ASS23225W
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
40
Freescale Semiconductor
Revision History
4
Revision History
Table 23. Revision History
Revision
Description
1
Initial published
2
Updated ADC channels, Item 1, 4-5 on Table 2.10
3
Completed all theTBDs.
Changed RTC to RTI in Figure 1.
Corrected the block diagram.
Changed VDDAD to VDDA, VSSAD to VSSA.
Added charge device model data and removed machine data in Table 8.
Updated the specifications of VLVDH, VLVDL, VLVWH and VLVWL in Table 10.
Updated S2IDD, S3IDD in Table 11.
Added C column in Table 14.
Updated fdco_DMX32 in Table 16.
4
Corrected the expansion of SPI to serial peripheral interface.
5
Updated VLVDL in the Table 10.
Updated RIDD in the Table 11.
6
Updated VLVDH, VLVDL, VLVWH and VLVWL in the Table 10.
Added LPO on the Figure 1 and LPO features in the Section 1.3, “Features.”
7
Added 44-pin LQFP package information for AC256 and AC128.
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Freescale Semiconductor
41
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MCF51AC256
Rev.7
9/2011
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