SPI1
If the PICtail Daughter Board is mated to the topmost SPI1 slot on the Explorer 16 or PIC32
I/O Expansion Board, the following connections will be made:
SPI1 Mating Connections
Signal Name on Board
J2
Pin
Mating
Pin
PICtail?
Explorer 16 and
Function
Daughter Board
PIC32 I/O Exp.
3
3
SCK/AL
RF6/SCKI
SPI Clock from PIC ? MCU
5
5
SO/WR/WRL/EN RF7/SDI1_E
SPI Data to PIC MCU
7
9, 10
13
15, 16
17
19
20
23, 24
7
9, 10
13
15, 16
17
19
20
23, 24
SI/RD/RW
GND
MDIX
GND
INT/SPISEL
CS/CS
SHDN
+5V
RF8/SDO1_E
GND
RB3/AN3
GND
RE9/INT2
RD14/U1CTS_E
RD15/U1RTS_E
+5V
SPI Data from PIC MCU
Ground Reference
Ethernet Crossover from PIC MCU
Ground Reference
Interrupt to PIC MCU
SPI Chip Select from PIC MCU
Shutdown from PIC MCU
5V Power
If using the PIC32 I/O Expansion Board with a PIC32 USB Starter Board (Rev B), do not
plug the PICtail Daughter Board into the SPI1 slot. The RD14/U1CTS signal is routed on the
starter board to USB power control circuitry and will cause bus contention with the
ENC624J600 chip select signal.
SPI2
If the PICtail Daughter Board is mated to the middle SPI2 slot on the Explorer 16 or PIC32
I/O Expansion Board, the following connections will be made:
SPI2 Mating Connections
Signal Name on Board
J2
Pin
Mating
Pin
PICtail?
Explorer 16 and
Function
Daughter Board
PIC32 I/O Exp.
3
35
SCK/AL
RG6/PMPA2/SCK2
SPI Clock from PIC ? MCU
5
37
SOWR/WRL/EN RG7/PMPA4/SDI2
SPI Data to PIC MCU
7
39
SI/RD/RW
RG8/PMPA3/SDO2
SPI Data from PIC MCU
9, 10
41, 42 GND
GND
Ground Reference
13
45
MDIX
RA9/PMPA7
Ethernet Crossover from PIC MCU
15, 16 47, 48 GND
GND
Ground Reference
17
19
20
49
51
52
INT/SPISEL
CS/CS
SHDN
RA15/INT4
RF12/U2CTS
RF13/U2RTS
Interrupt to PIC MCU
SPI Chip Select from PIC MCU
Shutdown from PIC MCU
23, 24 55, 56 +5V
+5V
5V Power
Note that Explorer 16 and PIC32 I/O Exp. signal names are with respect to the Explorer 16
schematic, which assumes the use of a PIC24FJ128GA010 PIM. Various other PIMs
(e.g., PIC32MX460F512L) have a different pinout, making several of the pin names listed in
the prior two tables inaccurate. Always check the PIM or PIC32 processor board
schematics, or documentation to ensure that the signals have not been rewired.
5
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