Silicon Laboratories C8051F55 Series User Manual page 15

5.16. Target Board Pin Assignment Summary
Some GPIO pins of the C8051F568 MCU can have an alternate fixed function. For example, pin 38 on the
C8051F568 MCU is designated P0.4, and can be used as a GPIO pin. Also, if the UART0 peripheral on the MCU is
enabled using the crossbar registers, the TX signal is routed to this pin. This is shown in the "Alternate Fixed
Function" column. The "Target Board Function" column shows that this pin is used as TX on the C8051F560 Target
Board. The "Relevant Headers" column shows that this signal is routed to pin 3 of the J17 header and pin 5 of the
J1 header. More details can be found in the C8051F55x/56x/57x data sheet. Some of the GPIO pins of the
C8051F568 have been used for various functions on the target board. All pins of the Side A MCU also connect to
the 96-pin (P1) expansion connector which is not explicitly listed below. Table 12 summarizes the C8051F568 MCU
pin assignments on the target board, and also shows the various headers associated with each signal.
Table 12. C8051F560 Target Board Pin Assignments and Headers
MCU Pin Name Pin#
P0.0 8
P0.1 1
P0.2 40
P0.3 39
P0.4 38
P0.5 37
P0.6 36
P0.7 35
P1.0 34
P1.1 33
P1.2 32
P1.3 31
P1.4 30
P1.5 29
P1.6 28
P1.7 27
P2.0 26
P2.1 25
P2.2 24
P2.3 23
P2.4 22
P2.5 21
P2.6 20
P2.7 19
P3.0 18
Primary Alternate Fixed
Function Function
P0.0 VREF
P0.1 CNVSTR
P0.2 XTAL1
P0.3 XTAL2
P0.4 UART_TX
P0.5 UART_RX
P0.6 CAN_TX
P0.7 CAN_RX
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5 ALE (U8)
P1.6
P1.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
P3.0
Rev. 0.2
C8 05 1 F 5 5x /5 6x / 57 x
Target Board Relevant Headers
Function
VREF
CNVSTR
XTAL1
XTAL2
TX_MCU
RX_MCU
CAN_TX
CAN_RX
LIN_TX
LIN_RX
POTENTIOMETER
LED
SWITCH
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
J0[1], J22[1]
J0[2]
J0[3]*, J9[2]
J0[4]*, J10[2]
J0[5], J17[3]
J0[6], J17[1]
J0[7], J17[5]
J0[8], J17[7]
J1[1], J17[9]
J1[2], J17[11]
J1[3], J20[1]
J1[4], J19[4]
J1[5], J19[2]
J1[6]
J1[7]
J18]
J2[1]
J2[2]
J2[3]
J2[4]
J2[5]
J2[6]
J2[7]
J2[8]
J3[1]
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