TWR-K20D72M User’s Manual
Page 15 of 17
5
Elevator Connections
The TWR-K20D72M features two expansion card-edge connectors that interface to Elevator boards in a
Tower System: the Primary and Secondary Elevator connectors. The Primary Elevator connector,
comprised of sides A and B, is utilized by the TWR-K20D72M, while the Secondary Elevator connector
only makes connections to ground (GND). Table 6 provides the pinout for the Primary Elevator
Connector.
Table 6.
TWR-K20D72M 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_SENSE
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
PTE2
A7
SCL0
PTB2
B8
SDHC_D3 / SPI1_CS1_b
A8
SDA0
PTB3
B9
SDHC_D3 / SPI1_CS0_b
PTE4
A9
GPIO9 / CTS1
PTC9
B10 SDHC_CMD / SPI1_MOSI PTE1
A10
GPIO8 / SDHC_D2
PTB22
B11
SDHC_D0 / SPI1_MISO
PTE3
A11
GPIO7 / SD_WP_DET
PTB21
B12
ETH_COL
A12
ETH_CRS
B13
ETH_RXER
A13
ETH_MDC
B14
ETH_TXCLK
A14
ETH_MDIO
B15
ETH_TXEN
A15
ETH_RXCLK
B16
ETH_TXER
A16
ETH_RXDV
B17
ETH_TXD3
A17
ETH_RXD3
B18
ETH_TXD2
A18
ETH_RXD2
B19
ETH_TXD1
A19
ETH_RXD1
B20
ETH_TXD0
A20
ETH_RXD0
B21
GPIO1 / RTS1
PTC7
A21
SSI_MCLK
PTC8
B22
GPIO2 / SDHC_D1
PTE0
A22
SSI_BCLK
PTB18
B23
GPIO3
PTB20
A23
SSI_FS
PTB19
B24
CLKIN0
A24
SSI_RXD
PTC11
B25
CLKOUT1
PTE26
A25
SSI_TXD
PTC0
B26
GND
Ground
A26
GND
Ground
B27
AN7
PTB0
A27
AN3
ADC0_DP0
B28
AN6
PTB1
A28
AN2
ADC0_DM0
B29
AN5
PTB2
A29
AN1
ADC1_DP0
B30
AN4
PTB3
A30
AN0
ADC1_DM0
B31
GND
Ground
A31
GND
Ground
B32
DAC1
A32
DAC0
DAC0_OUT
B33
TMR3
A33
TMR1
PTA13
B34
TMR2
PTD7
A34
TMR0
PTA12
B35
GPIO4
PTA14
A35
GPIO6
PTA15
B36
3.3V
3.3V Power
A36
3.3V
3.3V Power
B37
PWM7
A37
PWM3
PTC4
B38
PWM6
PTD6
A38
PWM2
PTC3
B39
PWM5
PTD5
A39
PWM1
PTC2
B40
PWM4
PTD4
A40
PWM0
PTC1
B41
CANRX0
PTA13
A41
RXD0
PTD6
