CP3002 Functional Description
ID 1042-9252, Rev. 2.0 Page 2 - 25
P R E L I M I N A R Y
2.11.10.4 Rear I/O Pin Description
Serial Ports
The CP3002 provides two serial ports, COMA and COMB, both available on the rear I/O Com-
pactPCI connector J2.
Table 2-18: COMA and COMB Signal Description
PIN on J2 SIGNAL FUNCTION DRIVEN BY SIGNALING VOLTAGE
A17 COMA_TXD TXD serial port (COMA) CP3002 LVTTL (3.3V)
A18 COMA_RXD RXD serial port (COMA) Rear I/O module LVTTL (3.3V)
E18 COMA_CTS# CTS signal serial port (COMA) Rear I/O module LVTTL (3.3V)
B16 COMA_RTS# RTS signal serial port (COMA) CP3002 LVTTL (3.3V)
A16 COMA_DSR# DSR signal serial port (COMA) Rear I/O module LVTTL (3.3V)
B18 COMA_DCD# DCD signal serial port (COMA) Rear I/O module LVTTL (3.3V)
C18 COMA_DTR# DTR signal serial port (COMA) CP3002 LVTTL (3.3V)
E16 COMA_RI# RI signal serial port (COMA) Rear I/O module LVTTL (3.3V)
B10 COMB_TXD TXD serial port (COMB) CP3002 LVTTL (3.3V)
B17 COMB_RXD RXD serial port (COMB) Rear I/O module LVTTL (3.3V)
D18 COMB_CTS# CTS signal serial port (COMB) Rear I/O module LVTTL (3.3V)
C14 COMB_RTS# RTS signal serial port (COMB) CP3002 LVTTL (3.3V)
B7 COMB_DSR# DSR signal serial port (COMB) Rear I/O module LVTTL (3.3V)
C11 COMB_DCD# DCD signal serial port (COMB) Rear I/O module LVTTL (3.3V)
D10 COMB_DTR# DTR signal serial port (COMB) CP3002 LVTTL (3.3V)
C13 COMB_RI# RI signal serial port (COMB) Rear I/O module LVTTL (3.3V)
Note ...
The pins for the interfaces COMA and COMB (pins A18, A17, A16, B18, B17,
B16, B10, B7, C18, C14, C13, C11, D18, D10, E18, and E16) tolerate only
3.3V signaling and their inputs (driven by the rear I/O module) have internal
pull-up resistors.
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