PIC32-MAXI-WEB
General purpose development board
USER’S MANUAL
Document revision C, October 2015
Designed by OLIMEX Ltd, 2013
All boards produced by Olimex LTD are ROHS compliant
DISCLAIMER
© 2015 Olimex Ltd. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd. Other product
names may be trademarks of others and the rights belong to their respective owners.
The information in this document is provided in connection with Olimex products. No license, express or implied
or otherwise, to any intellectual property right is granted by this document or in connection with the sale of
Olimex products.
This hardware design of PIC32-MAXI-WEB is neither public not open-source. Any copying of the product would result
in copyright infringement.
The software is released under the terms that are detailed in the agreement page, that pops-up when you attempt to
download a demo software archive.
It is possible that the pictures in this manual differ from the latest revision of the board.
The product described in this document is subject to continuous development and improvements. All particulars of the
product and its use contained in this document are given by OLIMEX in good faith. However all warranties implied or
expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded. This
document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss or
damage arising from the use of any information in this document or any error or omission in such information or any
incorrect use of the product.
This evaluation board/kit is intended for use for engineering development, demonstration, or evaluation purposes only
and is not considered by OLIMEX to be a finished end-product fit for general consumer use. Persons handling the
product must have electronics training and observe good engineering practice standards. As such, the goods being
provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related
protective considerations, including product safety and environmental measures typically found in end products that
incorporate such semiconductor components or circuit boards.
Olimex currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive. Olimex assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
THERE IS NO WARRANTY FOR THE DESIGN MATERIALS AND THE COMPONENTS
USED TO CREATE PIC32-MAXI-WEB. THEY ARE CONSIDERED SUITABLE ONLY
FOR PIC32-MAXI-WEB.
Page 2 of 22
Table of Contents
DISCLAIMER............................................................................................................. 2
1. INTRODUCTION................................................................................................... 4
1.1 BOARD FEATURES...............................................................................................................4
1.2 ELECTROSTATIC WARNING:............................................................................................4
1.3 BOARD USE REQUIREMENTS:.........................................................................................4
1.4 BOARD LAYOUT................................................................................................................... 5
2. MICROCONTROLLER DETAILS...................................................................... 6
2.1 FEATURES.............................................................................................................................. 6
2.2 BLOCK DIAGRAM................................................................................................................8
2.3 MEMORY MAP...................................................................................................................... 9
3 BOARD SCHEMATIC AND DIMENSIONS...................................................... 10
3.1 SCHEMATIC.........................................................................................................................10
3.2 PHYSICAL DIMENSIONS.................................................................................................. 12
4. CONTROL CIRCUITRY..................................................................................... 13
4.1 POWER SUPPLY CIRCUIT................................................................................................13
4.2 RESET CIRCUIT..................................................................................................................13
4.3 CLOCK CIRCUIT................................................................................................................ 13
5. JUMPERS, CONNECTORS AND INTERFACES............................................ 14
5.1 JUMPER DESCRIPTION....................................................................................................14
5.2 INPUT/OUTPUT................................................................................................................... 14
5.3 EXTERNAL CONNECTOR DESCRIPTION....................................................................15
5.3.1 PWR_JACK..................................................................................................................................................15
5.3.2 ICSP CONNECTOR....................................................................................................................................15
5.3.3 RS232/UART.................................................................................................................................................16
5.3.6 CAN1 AND CAN2........................................................................................................................................17
5.3.7 JTAG..............................................................................................................................................................17
5.3.8 UEXT1...........................................................................................................................................................18
5.3.9 UEXT2...........................................................................................................................................................18
5.3.10 MICROSD CARD......................................................................................................................................19
6. AVAILABLE DEMO SOFTWARE......................................................................20
7. REVISION AND ORDERING INFORMATION.............................................. 21
7.1 DOCUMENT REVISION.....................................................................................................21
7.2 BOARD REVISION.............................................................................................................. 21
8. WARRANTY AND SUPPORT.............................................................................22
Page 3 of 22
1. INTRODUCTION
This board features a PIC32 processor with embedded 100Mbit Ethernet module which allows you
to easily develop network applications. It has everything you would normally need for such
applications: power relays which you can command through a web interface, a large 240×320 TFT
LCD with touchscreen support (that allows the development of complex graphical user interface
applications), digital opto-isolated inputs, trimmer potentiometer, accelerometer with integrated
temperature sensor, two CAN interface channels, RS232 interface, USB On-The-Go and micro SD
card slot to store large amounts of data. With this board you can easily automate your home and
then control and monitor it from any point in the world via Internet. An extension connector is
available so you can connect custom made hardware to the board. The PIC32MX795F512L has
512K Flash memory (plus an additional 12 KB of Boot Flash).
1.1 BOARD FEATURES
The notable board features are listed below:
PIC32MX795F512L high-performance, USB, CAN and Ethernet 32-bit Flash
microcontroller
TFT LCD 320×240 65k colors with resistive touchscreen
Debug interface – JTAG and ICSP
RESET circuit
Reset button
Two opto-isolated digital inputs with indicator LEDs
Two CAN interfaces
100Mbit Ethernet interface
Two UEXT connectors to connect to other Olimex boards
Accelerometer with integrated temperature sensor
MicroSD card holder
Two relays 10A/250VAC with indicator LEDs
USB On-The-Go
RS232 interface
Trimmer connected to analog input
Three user LEDs
Stand-alone power LED
Three user buttons
3.3V voltage regulator
Dimensions (140×100) mm (5.51×3.94)"
1.2 ELECTROSTATIC WARNING:
The PIC32-MAXI-WEB board is shipped in protective anti-static packaging. The board must not be
subject to high electrostatic potentials. General practice for working with static sensitive devices
should be applied when working with this board.
1.3 BOARD USE REQUIREMENTS:
Cables: the board needs external power supply cable and mini ICSP cable (connected to the
respective debugger) in order to test basic functionality. Depending on the peripherals used you may
also need and Ethernet RJ45 terminated cable, 9pin RS232 cable, miniUSB cable.
Page 4 of 22
Hardware: The board requires +12V regulated power supply.
!!! Please note that the PIC32 processor on this board is not supported by the once famous ICD2
programmer/debugger and derivatives. You would need a newer debugger/programmer. Please
ensure your programmer/debugger is compatible with PIC32 microcontrollers.
1.4 BOARD LAYOUT
Page 5 of 22
2. MICROCONTROLLER DETAILS
Some of the details about the main microcontroller in PIC32-MAXI-WEB (PIC32MX795F512L)
microcontroller are mentioned in this chapter. It is highly recommended to refer to the original
datasheet which might be downloaded from the official Microchip web-side.
2.1 FEATURES
PIC32-MAXI-WEB board uses MCU PIC32MX795F512L from Microchip Technology that packs
the following features:
High-Performance 32-bit RISC CPU:
MIPS32® M4K® 32-bit core with 5-stage pipeline
80 MHz maximum frequency
1.56 DMIPS/MHz (Dhrystone 2.1) performance at zero Wait state Flash access
Single-cycle multiply and high-performance divide unit
MIPS16e™ mode for up to 40% smaller code size
Two sets of 32 core register files (32-bit) to reduce interrupt latency
Prefetch Cache module to speed execution from Flash
Microcontroller Features:
Operating voltage range of 2.3V to 3.6V
512K Flash memory (plus an additional 12 KB of Boot Flash)
128K SRAM memory
Pin-compatible with most PIC24/dsPIC® DSC devices
Multiple power management modes
Multiple interrupt vectors with individually programmable priority
Fail-Safe Clock Monitor mode
Configurable Watchdog Timer with on-chip Low-Power RC oscillator for reliable operation
Peripheral Features:
Atomic SET, CLEAR and INVERT operation on select peripheral registers
8-channels of hardware DMA with automatic data size detection
USB 2.0-compliant full-speed device and On-The-Go (OTG) controller:
Dedicated DMA channels
10/100 Mbps Ethernet MAC with MII and RMII interface:
Dedicated DMA channels
CAN module:
2.0B Active with DeviceNet™ addressing support
Dedicated DMA channels
3 MHz to 25 MHz crystal oscillator
Internal 8 MHz and 32 kHz oscillators
Six UART modules with:
RS-232, RS-485 and LIN 1.2 support
IrDA® with on-chip hardware encoder and decoder
Four SPI modules
Five I2C™ modules
Separate PLLs for CPU and USB clocks
Parallel Master and Slave Port (PMP/PSP) with 8-bit and 16-bit data, and up to 16 address
Page 6 of 22
lines
Hardware Real-Time Clock and Calendar (RTCC)
Five 16-bit Timers/Counters (two 16-bit pairs combine to create two 32-bit timers)
Five Capture inputs
Five Compare/PWM outputs
Five external interrupt pins
High-speed I/O pins capable of toggling at up to 80 MHz
High-current sink/source (18 mA/18 mA) on all I/O pins
Configurable open-drain output on digital I/O pins
Debug Features:
Two programming and debugging Interfaces:
2-wire interface with unintrusive access and real-time data exchange with application
4-wire MIPS® standard enhanced Joint Test Action Group (JTAG) interface
Unintrusive hardware-based instruction trace
IEEE Standard 1149.2 compatible (JTAG) boundary scan
Analog Features:
16-channel, 10-bit Analog-to-Digital Converter:
1 Msps conversion rate
Conversion available during Sleep and Idle
Two Analog Comparators
5V tolerant input pins (digital pins only)
Page 7 of 22
2.2 BLOCK DIAGRAM
A block diagram with main functional parts of the microcontroller as seen in the official Microchip
documentation.
Page 8 of 22
2.3 MEMORY MAP
The microcontroller's memory regions as seen in the official Microchip documentation.
Page 9 of 22
3 BOARD SCHEMATIC AND DIMENSIONS
In this chapter you may find information about the schematics describing logically and physically
PIC32-MAXI-WEB.
3.1 SCHEMATIC
The schematic of PIC32-MAXI-WEB is available for reference on the next page.
Only the board schematic is available to the customer. It is available only as a stand-alone PDF
document and as a reference image on. The board design files are kept private.
If you are looking for a schematic of an older revision of the board and it isn't available at our web
site you may request it by the support e-mail.
Page 10 of 22
PIC32-MAXI-WEB, board revision A:
2.5V
LAN
SW_SCL1
PHY_IRQ
MOSI3A
3.3V
C20
C21
R8
100nF
10uF/6.3V/0805
COM
TD-
75
AY
GND5
6
35
GND4
8
34
FXSD/FXEN
33
RX+
RJLBC-060TC1
32
RX-
31
VDDRX
30
PD#
29
LED3/NWAYEN
28
LED2/DUPLEX
27
LED1/SPD100/NFEF
26
LED0/TEST
25
INT/PHYAD0
RD+
NC
RD-
1nF/2kV
3.3V
R27
1k
R26
R25
R24
R23
NA
330R
330R
330R
R22
4.7k
MDIO
2
MDC
SW_U2TX
EMDIO
EMDC
1
3
RXD3/PHYAD1
4
RXD2/PHYAD2
5
RXD1/PHYAD3
6
RXD0/PHYAD4
7
VDDIO1
8
GND1
9
RXDV/CRSDV/PCS_LPBK
10
RXC
11
RXER/ISO
12
GND2
3.3V
R103
330R
2
1
GYX-SD-TC0805SURK(RED)
ERXDV
R38
R39
R40
10uF/6.3V
3.3V
C30
3.3V
D8
1N4148
2
R16
LED_IN2
R102
330R
2
1
1
D7
1N4148
2
3.3V
4.7k
3
1
2
3
4
5
6
7
8
R41
R42
R43
U2RX
SDA2
MOSI3A
UEXT2_CS
10
0R
R44
0R(NA)
NA
4.7k
SW_U2RX
AC1RX
3.3V
3.3V
10k
SD/MMC
3.3V
NC2
VDDIO
2
1M
10k
CS_MMC 2
MOSI3A 3
6
SCK6
SDO7 R50
SDI/SDA
8
NC1
10
9
C29
100nF
R45
R46
VDD
INT 4
R51
0R(NA)
4
R47
R48
R49
L2
ACC_INT
3.3V
0R
CSB5
GND
SCL2
1k
SDA2
CD/DAT3/CS
CMD/DI
VSS
VDD
5
AC1TX/SCK3A
CLK/SCLK
MISO3A 7
100k
100k
100k
8
1
CL470nH/0805/1.76R/250mA
DAT0/DO
DAT1/RES
DAT2/RES
SD/MMC
MICRO
C28
47uF/6.3V/TANT
SMB380,(QFN10)
E/D
4
VDD
OUT
VSS
3
+12V
R101
IN2
4
1
100nF
100nF
OPT2
GYX-SD-TC0805SURK(RED)
3.3V
CD1
H11A817SMD
C25
C26
C27
TB2-3.5mm
IN2
1
47uF/6.3V/TANT
4.7k
3
10k
UEXT2
U2TX
SCL2
MISO3A
U3
C64
100k
R104
IN1
R37
R105
330R
3
4
0R(NA)
NA
4.7k
0R
ACCELEROMETER
3.3V
AERXERR
3.3V
1
SW_SDA1
AETXEN
MISO3A
0R(NA)
NA
NA
0R
BH10S
U2
OPT1
10
AC1TX/SCK3A
9
3.3V
LED_IN1
8
9
3.3V
4.7k
R34
R35
R36
RXD1
SDA1
MOSI1
UEXT1_CS
4
6
7
AERXD1
AERXD0
KS8721BLMM
IN1
3
5
RXD1_INT
NA
R33
2
UEXT2
3.3V
3.3V
DIGITAL INs
TXD1
SCL1
MISO1
SCK1
3.3V
1k
C63
PHY_IRQ
1
3.3V
R10
36
R32
UEXT1
0R(NA)
NA
NA
10uF/6.3V/0805
R9
10k
7
4.7k
0R
BH10S
KY
KY
R28
R29
R30
R31
C22
100nF
C23
+
PHY_RSTN
R6
1.5K/1%
KG
AY
1:1
75
3
2
AG
AG
KG
YELLOW
R7
4.99k/1%
1
TD+
75
GREEN
3
7
8
6
3.3V
PHY_VDD_PLL
1:1
75
10k
FB0805/600R/200mA(201209-601)
FB2
LAN
1
4
5
2
UEXT1
3.3V
3.3V
See LPC2378-STK_Rev.C
REL
REL1
1
+12V
RELAYS
2
6NC2-50MHz
PHY_REFCLK
D1
REL1
D2
REL2
2
TB2-3.5mm
3
H11A817SMD
R52
4
3.3V
R53
1N4148
RAS-12-15
1k
5
1N4148
RAS-12-15
1k
6
HD-515R_6P
CAN
3.3V
3.3V
R99
10k
86
10k
2
OPEN
2
1
TB3-3.5mm
8
RS
7
CANH
6
CANL
5
VREF
C2
100nF
100nF
C3
100nF
C4
100nF
C5
100nF
100nF
AC1RX
3.3V
3.3V
3
2
8
RS
7
CANH
OPEN
6
CANL
5
VREF
100nF
C13
100nF
VSS
VSS
55
+5V_VBUS
85
FB0805/600R/200mA(201209-601)
30
C12
AC2TX
VBUS
AN2/C2IN-/CN4/RB2
23
ACC_INT
AN3/C2IN+/CN5/RB3
22
USB_FAULT
VCAP/VDDCORE
AN4/C1IN-/CN6/RB4
RXD1_INT
21
AN5/C1IN+/VBUSON/CN7/RB5
20
VBUSON
R91 0R
0R(NA)
31
AGND
AC2RX
RSTN
3.3V
3.3V
+5V
10k
10k
R90
R89
U6
C60
8
OUT_A
7
IN
6
GND
5
OUT_B
1
#ENA
2
FLAG_A
3
FLAG_B
4
#ENB
100nF
USB_FAULT
LM3526M-L(SO8)
VBUSON
T3
DTC114YKA
10k
USB_OTG
VBUS
DD+
ID
GND
FB4
USB_DUSB_D+
USBID
C59
C58
100nF
2.2uF
R54
330R
TCK
TMS
TDO
TDI
NC
13
14
11
12
9
10
7
8
5
6
3
4
1
2
CUT!!!
BH14S(PIN-CUT\!)
3.3V
ICSP
AN13/ERXD1/AECOL/PMA10/RB13
42
YU
AN14/ERXD2/AETXD3/PMALH/PMA1/RB14
SW_U2RX
43
#MCLR
RSTN 1
AN15/ERXD3/AETXD2/OCFB/PMALL/PMA0/CN12/RB15
44
XR
2
3
AERXERR
1
UEXT2_CS
RELAY1
RELAY2
PHY_REFCLK
ERXDV
IN1
IN2
USB_DUSB_D+
PMD9
PMD8
95
AC1TX/SCK3A
AC1RX
TXD1
MOSI3A
MISO3A
USBID
RXD1
PMD10
PMD11
39
T2CK/RC1
6
CS_MMC
T3CK/AC2TX/RC2
7
AC2TX
AERXERR/RG15
TRD2/RG14
97
TRD1/RG12
14
ERXDV/SCL2A/SDO2A/U2ATX/PMA3/CN10/RG8
11
ECOL/SCK2A/U2BTX/#U2ARTS/PMA5/CN8/RG6
56
D-/RG3
57
C2TX/ETXERR/PMD9/RG1
90
40
C2RX/PMD8/RG0
OC3/RD2
77
OC4/RD3
78
AC1TX/SCK3A/U3BTX/#U3ARTS/RF13
ETXCLK/PMD15/CN16/RD7
84
PMD15
ETXEN/PMD14/CN15/RD6
PMD14
83
AC1RX/#SS3A/U3BRX/U3ACTS/RF12
53
SCL3A/SDO3A/U3ATX/PMA8/CN18/RF5
49
USBID/RF3
52
C1TX/ETXD0/PMD10/RF1
87
AERXD1
AERXD0
19
PMD7
PMD6
PMD5
PMD4
5
AERXD0/INT1/RE8
PMD0/RE0
93
PMD1/RE1
94
PMD2/RE2
98
PMD7/RE7
PMD6/RE6
3
100
3.3V
R55
3.3V
PMD5/RE5
PMD3/RE3
99
PMD4/RE4
D4
1N4148
10k
RSTN R56
U4
NA(MCP130T)
1
330R
AETXD0/#SS1A/U1BRX/#U1ACTS/CN20/RD14
AETXD0
47
AETXD1/SCK1A/U1BTX/#U1ARTS/CN21/RD15
48
AETXD1
AERXD1/INT2/RE9
4
3.3V
ETXD2/IC5/PMD12/RD12
PMD12
79
ETXD3/PMD13/CN19/RD13
80
PMD13
C1RX/ETXD1/PMD11/RF0
18
RESET CIRCUIT
LED3
TFT_LIGHT
SCK1/IC3/PMCS2/PMA15/RD10
70
SCK1
EMDC/IC4/PMCS1/PMA14/RD11
71
EMDC
SDA1A/SDI1A/U1ARX/RF2
88
C10 27pF
RTCC/EMDIO/IC1/RD8
EMDIO
68
#SS1/IC2/RD9
UEXT1_CS
69
SDA3A/SDI3A/U3ARX/PMA9/CN17/RF4
51
Q2
QCT32768(2x6)/6pF
PMRD/CN14/RD5
82
PMRD
OC5/PMWR/CN13/RD4
81
PMWR
SCL1A/SDO1A/U1ATX/RF8
50
WF6S
Q8.000MHz/20pF/HC-49SM(SMD)
GND
SDO1/OC1/INT0/RD0
72
MOSI1
OC2/RD1
76
LED2
D+/RG2
89
6
C8 39pF
C9 27pF
SOSCO/T1CK/CN0/RC14
74
SOSCI/CN1/RC13
73
ECRS/SDA2A/SDI2A/U2ARX/PMA4/CN9/RG7
10
Q1
OSC1/CLKI/RC12
63
OSC2/CLKO/RC15
64
ERXCLK/#SS2A/U2BRX/#U2ACTS/PMA2/CN11/RG9
12
PGED2 4
PGEC2 5
C7 39pF
T4CK/AC2RX/RC3
AC2RX
8
T5CK/SDI1/RC4
MISO1
9
TRD0/RG13
96
+5V_VBUS
+5V_VBUS
USB_DUSB_D+
USBID
JTAG
NC
RSTN
AN11/ERXERR/AETXERR/PMA12/RB11
35
YD
AN12/ERXD0/AECRS/PMA11/RB12
41
XL
MCP2551
USB_OTG
1N5819(SS14)
AN9/C2OUT/RB9
33
SW_U2TX
AN10/CVREFOUT/PMA13/RB10
LED1
34
AVSS
13
3.3V
D3
PGEC2/AN6/OCFA/RB6
26
PGEC2
PGED2/AN7/RB7
27
PGED2
AN8/C1OUT/RB8
32
TRIM
AVDD
C11
100nF
10uF/6.3V/0805
DEBUG INTERFACE:
3.3V
PGED1/AN0/CN2/RB0
25
SW_SCL1
PGEC1/AN1/CN3/RB1
SW_SDA1
24
VUSB
54
3.3VA
100nF
U7
1
TXD
2
VSS
3
VDD
4
RXD
VSS
FB1
C61
1
2
1
TB3-3.5mm
C15
C14+ 10uF/6.3V/0805
R94
CAN2_D
VSS
75
3.3V
C16100nF
R95
120R
VSS
45
65
+5V
CAN2
VDD
C6
36
R96 0R
0R(NA)
TDI/RA4
60
TDO/RA5
61
VDD
15
MCP2551
10k
VDD
2
C1
AC1TX/SCK3A
RELAY2
SCL2/RA2
58
SDA2/RA3
59
VDD
16
100nF
U8
1
TXD
2
VSS
3
VDD
4
RXD
TMS
TCK
SCL2
SDA2
TDI
TDO
TRCLK/RA6
91
PHY_RSTN
TRD3/RA7
92
/TFT_RST
VREF-/CVREF-/AERXD2/PMA7/RA9
/TFT_CS
28
VREF+/CVREF+/AERXD3/PMA6/RA10
29
TFT_RS
AETXCLK/SCL1/INT3/RA14
66
PHY_IRQ
AETXEN/SDA1/INT4/RA15
67
AETXEN
VDD
37
C62
1
10k
TMS/RA0
17
TCK/RA1
38
VDD
62
CAN1_D
T2
DTC114YKA
U1
46
R100
120R
3
RELAY1
T1
DTC114YKA
VDD_E
CLOSE
+5V
CAN1
REL2
RESET
2
VCC
GND
RESET
C31
100nF
T1107A(6x3.8x2.5mm)
PMD0
PMD1
PMD2
PMD3
FB0805/600R/200mA(201209-601)
MICRO_AB
PIC32MX795F512L-80I/PT
RS232
3.3V
AN_TR
U5PWR
GND
R86
10k
VCC
15
6
C1+
V+
C1-
V-
C2+
R88
C2-
NA
RS232
PC_RXD
14
PC_CTS
7
G1
1
6
PC_RTS
7
PC_CTS
8
9
2
3
PC_CD
PC_RXD
PC_TXD
PC_TXD
13
PC_RTS
8
4
T1OUT
T1IN
T2OUT
T2IN
R1IN
3
AGND
100nF
LED1
5
LED2
LED3
TXD1
11
10
R87
330R
CTS
LED1
LED2
LED3
R85
330R
R84
330R
R83
330R
RXD1
RTS
ST3232(SO16)
G2
DB9-F
R58
R59
NA
NA
NA
#RESET
8
3.3V
2
VCC
3
VCC
#CS
4
5
RS
6
#WR
7
#RD
PMD0
PMD1
PMD2
PMD3
PMD4
PMD5
PMD6
PMD7
PMD8
PMD9
PMD10
PMD11
PMD12
PMD13
PMD14
PMD15
USER LEDS
C54
4
12
R1OUT
9
R2OUT
R2IN
5
AGND
C53
100nF
1
R57
9
C33
C32
100nF
100nF
1
GND
25
GND
DB0
YD
10 DB1
11 DB2
12 DB3
XL
YU
XR
13 DB4
14 DB5
26
27
28
29
15 DB6
16 DB7
17 DB8
35
LEDA
36
LEDA
18 DB9
19 DB10
30
LEDK1
31
LEDK2
32
LEDK3
33
LEDK4
34
LEDK5
20 DB11
21 DB12
22 DB13
23 DB14
24 DB15
YD
XL
YU
XR
R60
R61
100k
100k
FET1
IRLML6402
R62
0R
R63
100k
0R(NA)
R64
1k
37
GND
FS-K320QVB-V1
TFT_LIGHT
USER BUTTONS
POWER SUPPLY
3.3V
3.3V
R78
R73
R79
D6
+12V
1
6
R81
YDJ-1134
12VDC
4.7k
7
4
VIN
RT
EN/SYNC
GND
BD9778HFP
15k/1%
R80
VR1
1N5819(SS14)
PWR_JACK
INV 5
IN
4.99k/1%
L1
C41
1
R75
C46
4.7nF
1N5819(SS14)
C38
C37
BUT1
100nF
330R
PMD15
330R
R69
R66
NA(100R)
NA(100R)
NA(100R)
C36
NA(100nF)
R74
R76
D5
3.3VA
10k
R68
PMD14
R72
CLOSE
PWR
C40
15uH/DBS135
FB 3
2
R67
10k
R71
330R
3.3VA_E
OUT
ADJ/GND
C45
NA(10nF)
150k
SW 2
10k
3.3V
4.99k/1%
3.3V
R70
3.3V_E
CLOSE
VR1(3.3V)
LM1117IMPX-ADJ
R77
3.3V
3.3VA
+5V
C39
GND
AGND_E
1
2
AGND
CLOSE
AGND
Page 11 of 22
3.3V
TFT
C51
100nF
10uF/6.3V/0805
AGND
U5
2
100nF
C55
100nF
3.3V
/TFT_RST
/TFT_CS
TFT_RS
PMWR
PMRD
C52
C57
100nF
C56
3.3V
TRIM
330R
16
3.3V
TFT-LCD
TRIMMER
3.3VA
BUT2 C35
NA(100nF)
BUT3 C34
NA(100nF)
R65 PMD13
3.2 PHYSICAL DIMENSIONS
Note that all dimensions are in millimeters.
Page 12 of 22
4. CONTROL CIRCUITRY
4.1 POWER SUPPLY CIRCUIT
PIC32-MAXI-WEB can be power only from power connector PWR_JACK, where only 12 VDC
external voltage source has to be applied.
The board power consumption is about 300mA with all peripherals and MCU running at full speed,
relays and LEDs on and established Ethernet connection.
4.2 RESET CIRCUIT
PIC32-MAXI-WEB reset circuit is made of D4 (1N4148), RC group R55 – 10k and C31 – 100nF.
Serial resistor R56 – 330Ω is used to prevent fast C31 charge and discharge when
PIC32MX795F512L is being programmed.
Manual reset is possible by the RESET button.
4.3 CLOCK CIRCUIT
Quartz crystal Q1 8MHz is connected to PIC32MX795F512L pins 63 (OSC1/CLKI/RC12) and 64
(OSC2/CLKO/RC15).
Quartz crystal Q2 32.768 KHz is connected to PIC32MX795F512L pins 73 (SOSCI/CN1/RC13)
and 74 (SOSCO/T1CK/CN0/RC14).
Page 13 of 22
5. JUMPERS, CONNECTORS AND INTERFACES
In this chapter you will find the description of the jumpers and what signals might be found on the
different connectors.
5.1 JUMPER DESCRIPTION
3.3V_E – Enables 3.3V supply for PIC32MX795F512L and all other devices.
Default state closed (shorted).
3.3VA_E – Enables 3.3V positive supply for analog modules.
Default state is closed (shorted).
VDD_E – Enables PIC32MX795F512L's 3.3V power supply.
Default state is closed (shorted).
AGND_E – Enables the analog ground.
Default state is closed (shorted).
CAN1_T – This jumper assures correct work of the CAN1. At each end of the bus it
should be closed. This means that if you have only two devices with CAN, the jumpers of
both devices should be closed. If you have more than two devices, only the two end devices should
be closed.
Default state is closed (shorted).
CAN1_D – CAN Disable. If this jumper is closed, the CAN1 is disabled.
Default state is open (not shorted).
CAN2_T – This jumper assures correct work of the CAN2. At each end of the bus it
should be closed. This means that if you have only two devices with CAN, the jumpers of
both devices should be closed. If you have more than two devices, only the two end devices should
be closed.
Default state is closed (shorted).
CAN2_D – CAN Disable. If this jumper is closed, the CAN2 is disabled.
Default state is open (not shorted).
5.2 INPUT/OUTPUT
User button with name BUT1 – connected to PIC32MX795F512L pin 83
(ETXEN/PMD14/CN15/RD6).
User button with name BUT2 – connected to PIC32MX795F512L pin 84
(ETXCLK/PMD15/CN16/RD7).
User button with name BUT3 – connected to PIC32MX795F512L pin 80
(ETXD3/PMD13/CN19/RD13).
Reset button with name RESET – connected to PIC32MX460F512L pin 13 (#MCLR).
Page 14 of 22
One analog trimmer with name AN_TR – connected to PIC32MX795F512L pin 32
(AN8/C1OUT/RB8).
Status Led (yellow) with name LED1 – connected to PIC32MX795F512L pin 34
(AN10/CVREFOUT/PMA13/RB10).
Status Led (green) with name LED2 – connected to PIC32MX795F512L pin 76 (OC2/RD1).
Status Led (red) with name LED3 – connected to PIC32MX795F512L pin 77 (OC3/RD2).
Two opto-isolated digital inputs IN1 and IN2.
Two red LEDs – LED_IN1 and LED_IN2 for every digital input.
Two red LEDs – LED_R1, LED_R2 – for the relays.
Power supply red LED with name PWR – indicates that 3.3V power supply is available.
TFT LCD Display – FS-K320QVB-V1
5.3 EXTERNAL CONNECTOR DESCRIPTION
5.3.1 PWR_JACK
The power jack is used to power the board. Exactly 12V of voltage should be provided. The current
required depends on the peripherals used but generally your source should be capable to provide at
least 350mA.
The power jack is like the ones we use on all Olimex boards → YDJ-1134 (2mm in diameter front
hole).
If your power adapter doesn't have
the same jack you would need to
adapt it. Make sure that you
carefully follow the pin assignment.
Pin #
1
2
Signal name
Power input
GND
5.3.2 ICSP CONNECTOR
The ICSP connector is used for serial programming. It is the place where most common PIC32compatible programmers and debuggers are connected. The pins have 0.1'' step. If your
programmer/debugger has only the smaller 0.05'' connector you might need an adapter or you
should use jumper wires.
Page 15 of 22
Pin #
1
2
3
4
5
6
Signal name
RSTN
3.3V
GND
PGED2
PGEC2
NC
PGED2 conducts I/O operations for the “Program Data” signal. Serial data for programming.
PGEC2 serves only as input for the “Program Clock” signal. Clock used for transferring the serial
data (output from ICSP, input for the MCU).
5.3.3 RS232/UART
Pin #
1
2
3
4
5
6
7
8
9
Signal name
PC_CD
PC_RXD
PC_TXD
NC
GND
NC
PC_RTS
PC_CTS
NC
TXD is an output. It is the “Transmit Data” signal which is the asynchronous serial data output
(RS232) for the shift register on the UART controller.
RXD is an input. It is the “Receive Data” signal which is the asynchronous serial data input
(RS232) for the shift register on the UART controller.
The demo software uses RS232 so it would display your IP address on a PC terminal program (at
115200 baud) when the board is connected to a PC and has a valid Ethernet source connected.
5.3.4 USB_OTG
Pin #
1
2
3
4
5
Signal name
+5V_VBUS
USB_DUSB_D+
USBID
GND
Page 16 of 22
5.3.5 ETHERNET
Pin #
1
2
3
4
Signal name(chip side)
TX+
TXVCC/2 (2.5V)
Not Connected (NC)
LED
Left
Right
Pin #
5
6
7
8
Color
Yellow
Green
Signal name(chip side)
Not Connected (NC)
Not Connected (NC)
RX+
RXUsage
100MBits/s (Half/Full duplex)
Activity
5.3.6 CAN1 AND CAN2
Controller Area Network(CAN) is a standard designed to allow microcontrollers and devices to
communicate with each other within a vehicle without a host computer. Both CAN1 and CAN2
connectors follow the same layout.
Pin #
Signal
1
2
3
GND
CANL
CANH
5.3.7 JTAG
The microcontroller has EJTAG support. The EJTAG signals are provided on the 14-pin JTAG
connector.
Pin # Signal name
Pin #
Signal name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND
TCK
GND
RSTN
CUT
NC
3.3v
NC
GND
TDI
GND
TDO
GND
TMS
Page 17 of 22
5.3.8 UEXT1
The 10-pin UEXT connectors are typically mounted on Olimex boards. They pack three common
interfaces in a single connector – UART, I2C and SPI. You can use the UEXT connector to access
this interfaces easier (via jumper wires, for example).
You can also connect expansion modules to the UEXT connectors. More on UEXT might be found
here: https://www.olimex.com/Products/Modules/UEXT/
Pin #
1
2
3
4
5
6
7
8
9
10
Signal name
3.3 V
GND
TXD1
RXD1
SCL1
SDA1
MISO1
MOSI1
SCK1
UEXT1_CS
5.3.9 UEXT2
UEXT2 features other UART, I2C and SPI signals. However there is multiplexing on some of the
lines which might cause problems if you are trying to use the line on both places.
The I2C data lines (SCL2, SDA2) are used for the built-in the board accelerometer. The SPI clock
signal AC1TX/SCK3A is used by the SD card connector.
Pin #
1
2
3
4
5
6
7
8
9
10
Signal name
3.3 V
GND
U2TX
U2RX
SCL2
SDA2
MISO3A
MOSI3A
AC1TX/SCK3A
UEXT2_CS
Page 18 of 22
5.3.10 MICROSD CARD
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
Signal name
MCIDAT2
CS_MMC
MOSI3A
VDD (3.3 V)
AC1TX/SCK3A
GND
MISO3A
MCIDAT1
Not Connected
Not Connected
Not Connected
Not Connected
Page 19 of 22
6. AVAILABLE DEMO SOFTWARE
To compile the demo you would need the following tools: MPLAB IDE v8.91 or MPLABX 1.80,
Compiler: XC32 v1.21.
The demo demonstrates the functionality of the various peripherals of the board including user
input, serial communication, the implementation of Graphical User Interface (GUI) and betwork
connectivity
The demo is built upon the Microchip Solutions library (released on 22 august 2012) including
freely distributed support libraries:
- Microchip Graphics Library v3.06
- Microchip TCP/IP Stack Library v5.42
- Microchip MDD File System Library 1.4.0 (FAT, FAT32 file systems)
- Microchip USB support source files
FreeRTOS was used to make all tasks run virtually simultaneously. FreeRTOS is a freely distributed
RTOS with excellent support and online documentation. Version used is v7.3.0. MPLAB has
support for FreeRTOS (Tools/RTOS viewer).
You could find demo software for PIC32-MAXI-WEB board at the board's web page. It is
recommended to refer to the “README.txt” file inside the demo archive.
Direct link to PIC32-MAXI-WEB's web-page:
https://www.olimex.com/Products/PIC/Development/PIC32-MAXI-WEB/
Page 20 of 22
7. REVISION AND ORDERING INFORMATION
PIC32-MAXI-WEB – fully assembled and tested
How to purchase?
You can purchase directly from our online shop or from any of our distributors. Note that usually it
is faster and cheaper to purchase Olimex products from our distributors. List of confirmed Olimex
LTD distributors and resellers: https://www.olimex.com/Distributors.
Please visit https://www.olimex.com/ for more info.
7.1 DOCUMENT REVISION
Revision, date
Changes
Modified page
A, 30.08.13
Initial manual release
All
B, 03.12.13
Document remake
All
C, 30.10.15
Fixed a number of errors
All
7.2 BOARD REVISION
Remember to check the schematics and the board design files to compare the differences.
Revision
A
Notable changes
Initial release of the board
Page 21 of 22
8. WARRANTY AND SUPPORT
For product support, hardware information and error reports mail to: support@olimex.com. All
document or hardware feedback is welcome. Note that we are primarily a hardware company and
our software support is limited. Please consider reading the paragraph below about the warranty of
Olimex products.
All goods are checked before they are sent out. In the unlikely event that goods are faulty,
they must be returned, to OLIMEX at the address listed on your order invoice.
OLIMEX will not accept goods that have clearly been used more than the amount needed to
evaluate their functionality.
If the goods are found to be in working condition, and the lack of functionality is a result of
lack of knowledge on the customers part, no refund will be made, but the goods will be returned
to the user at their expense.
All returns must be authorized by an RMA Number. Email support@olimex.com for authorization
number before shipping back any merchandise. Please include your name, phone number and order
number in your email request.
Returns for any unaffected development board, programmer, tools, and cables permitted within 7
days from the date of receipt of merchandise. After such time, all sales are considered final.
Returns of incorrect ordered items are allowed subject to a 10% restocking fee. What is
unaffected? If you hooked it to power, you affected it. To be clear, this includes items that
have been soldered to, or have had their firmware changed. Because of the nature of the
products we deal with (prototyping electronic tools) we cannot allow returns of items that have
been programmed, powered up, or otherwise changed post shipment from our warehouse.
All returned merchandise must be in its original mint and clean condition. Returns on damaged,
scratched, programmed, burnt, or otherwise 'played with' merchandise will not be accepted.
All returns must include all the factory accessories which come with the item. This includes
any In-Circuit-Serial-Programming cables, anti-static packing, boxes, etc.
With your return, enclose your PO#. Also include a brief letter of explanation of why the
merchandise is being returned and state your request for either a refund or an exchange.
Include the authorization number on this letter, and on the outside of the shipping box.
Please note: It is your responsibility to ensure that returned goods reach us. Please use a
reliable form of shipping. If we do not receive your package we will not be held liable.
Shipping and handling charges are not refundable. We are not responsible for any shipping
charges of merchandise being returned to us or returning working items to you.
The full text might be found at https://www.olimex.com/wiki/GTC#Warranty for future reference.
Page 22 of 22
工商网监
湘ICP备2023018690号
