TWR-56F8400 User’s Manual
Page 20 of 35
Appendix A – Tower Elevator Connector Pin Functions
Table 7 provides the pin out for the Primary Elevator Connector. An “X” in the “Used” column
indicates that there is a connection from the TWR-56F8400 board to that pin on the Elevator
connector. An “X” in the “Jmp” column indicates that a jumper is available that can isolate the
onboard circuitry from the Elevator connector. An “X” in the “Jmp” column indicates that a jumper is
available that can isolate part of the onboard circuitry from the Elevator connector.
The function listed in the “Usage” column is the function(s) that the pin is expected to be programmed
to provide when used with the Tower system. All of the MC56F84789 pins (except power) have
multiple functions. Not all of the possible functions are shown.
Note that all analog pins (ANAn or ANBn) have a low pass filter to ground consisting of a 100 ohm
resistor and a 2200 pf capacitor. This is to protect the analog inputs of the DSC from a static discharge
at one of the connectors. See schematic sheets 6 and 7 in Appendix B – TWR-56F8400 Board
Schematic.
Table 7.
TWR-56F8400 Primary Elevator Connector Pin Out
TWR-56F8400 Primary Connector
Pin
Name
Usage
Used Jmp Pin
Name
Usage
Used Jmp
B1
5V_1
5V Power
X
X A1
5V_2
5V Power
X
X
B2
GND
Ground
X
A2
GND_9
Ground
X
B3
3.3V_1
3.3V Power
X
X A3
3.3V_4
3.3V Power
X
X
B4
ELE_PS_SENSE_1
3.3V Power
X
X A4
3.3V_5
3.3V Power
X
X
B5
GND_2
Ground
X
A5
GND_10
Ground
X
B6
GND_3
Ground
X
A6
GND_11
Ground
X
B7
SDHC_CLK / SPI1_CLK SCK (see also pin B48)
X
A7
I2C0_SCL
SCL0
X
B8 SDHC_D3 / SPI1_CS1_b
A8
I2C0_SDA
SDA0
X
B9 SDHC_D3 / SPI1_CS0_b SS_B (see also pin B46)
X
A9 GPIO9/UART1_CTS1 GPIOA4/ANA4
X
X
B10 SDHC_CMD / SPI1_MOSI MOSI (see also pin B45)
X
A10
GPIO8/SDHC_D2
GPIOA5/ANA5
X
X
B11 SDHC_D0 / SPI1_MISO MISO (see also pin B44)
X
A11 GPIO7 / SD_WP_DET GPIOA6/ANA6
X
X
B12
ETH_COL_1
A12
ETH_CRS
B13
ETH_RXER_1
A13
ETH_MDC_1
B14
ETH_TXCLK_1
A14
ETH_MDIO_1
B15
ETH_TXEN_1
A15
ETH_RXCLK_1
B16
ETH_TXER
A16
ETH_RXDV_1
B17
ETH_TXD3
A17
ETH_RXD3
B18
ETH_TXD2
A18
ETH_RXD2
B19
ETH_TXD1_1
A19
ETH_RXD1_1
B20
ETH_TXD0_1
A20
ETH_RXD0_1
B21 GPIO1 / UART1_RTS1 GPIOB4/ANB4&CMPC_M1
X
X A21
I2S0_MCLK
B22
GPIO2 / SDHC_D1
GPIOB5/ANB5&CMPC_M2
X
X
A22
I2S0_DOUT_SCLK
