TWR-P1025 Hardware User Guide, Rev. 0
Freescale Semiconductor
1
Chapter 6
Tower Elevator Connections
6.1
Overview
The TWR-P1025 features two expansion card-edge connectors that interface to the primary and secondary
elevator boards in a Tower system. The Primary Connector (comprised of sides A and B) is utilized by the
TWR-P1025 while the Secondary Connector (comprised of sides C and D) makes connections to the the
SER3 & 7 Serial ports as well as ENET5 RMII and three SERDES lanes. Table 14 provides the pinout for
the Primary Connector. Table 15 provides the pinout for the Secondary Connector.
Table 6-1. TWR-P1025 Primary Connector Pinout
Pin#
Side B
Pin#
Side A
Name
Usage
Name
Usage
B1
5V
5.0V Power
A1
5V
5.0V Power
B2
GND
Ground
A2
GND
Ground
B3
3.3V
3.3V Power
A3
3.3V
3.3V Power
B4
ELE_PS_SE
NSE
Elevator
Power Sense
A4
3.3V
3.3V Power
B5
GND
Ground
A5
GND
Ground
B6
GND
Ground
A6
GND
Ground
B7
SDHC_CLK /
SPI1_CLK
A7
SCL0
I2C1_SCL
B8
SDHC_D3 /
SPI1_CS1_b
A8
SDA0
I2C1_SDA
B9
SDHC_D3 /
SPI1_CS0_b
A9
GPIO9 / CTS1
GPIO_EXPAND4
B10
SDHC_CMD /
SPI1_MOSI
A10
GPIO8 / SDHC_led
GPIO_EXPAND3
B11
SDHC_D0 /
SPI1_MISO
A11
GPIO7 /
SD_WP_DET
GPIO_EXPAND2
B12
ETH_COL
ENET1_COL
A12
ETH_CRS
ENET1_CRS
B13
ETH_RXER
ENET1_RX_
ER
A13
ETH_MDC
QE_MDC
B14
ETH_TXCLK
ENET1_TXCL
K
A14
ETH_MDIO
QE_MDIO