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Connector Pin Assignments
7
MCPN750A Connector J4
7-6
Serial COM Ports 1-4:
COMnTD - COM Port n Transmit Data Output
COMnRD - COM Port n Receive Data Input
Miscellaneous:
TMCOM1_L - Used to select COM1 active on processor board or on
Transition Module
MXCLK - multiplexed I/O signal clock, 10 MHz
MXSYNC_L - multiplexed I/O sync signal
MXDI - multiplexed I/O data in signal from transition module
MXDO - multiplexed I/O data out signal to transition module
2
I2CSCL - I
C Serial Clock for Transition Module SROM
2
I2CSDA - I
C Serial Data for Transition Module SROM
USBV0_OK - USB Port 0 Voltage Monitor
USBV1_OK - USB Port 1 Voltage Monitor
Connector J4 is installed on both the processor board and the transition
module for mechanical alignment purposes only. The keying tabs in the
Type A connector assist with alignment of pins in the backplane connector
during insertion of the boards. No signals are connected to the J4 pins
except the ground pins 1 through 11 in Row F of the outer shield, which
are connected to the board logic ground.
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