D R A F T — F O R I N
T E R N A L U S E O N L Y
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User Guide
CP3004-SA
2.7.9.4 Rear I/O Pin Description
Serial Ports
The CP3004-SA provides two serial ports, COMA and COMB, both available on the rear I/O CompactPCI
connector J2.
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.
General Purpose Inputs/Outputs
Alternatively, the following GPIO signals are available instead of the COMB signals if pin D4 on the rear
I/O connector J2 (GPIO_CFG0) is set to 0.
Table 15: COMA and COMB Signal Description
PIN on J2
SIGNAL
FUNCTION
DRIVEN BY
SIGNALING VOLTAGE
A17
COMA_TXD
TXD serial port (COMA)
CP3004-SA
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)
CP3004-SA
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)
CP3004-SA
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)
CP3004-SA
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)
CP3004-SA
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)
CP3004-SA
LVTTL (3.3V)
C13
COMB_RI#
RI signal serial port (COMB)
Rear I/O module
LVTTL (3.3V)
Table 16: GPIO Signal Description
PIN on J2
SIGNAL
FUNCTION
DRIVEN BY
SIGNALING VOLTAGE
B10
GPO0
General purpose output 0
CP3004-SA
LVTTL (3.3V)
B17
GPI0
General purpose input 0
Rear I/O module
LVTTL (3.3V)
D18
GPI1
General purpose input 1
Rear I/O module
LVTTL (3.3V)
C14
GPO1
General purpose output 1
CP3004-SA
LVTTL (3.3V)
B7
GPI2
General purpose input 2
Rear I/O module
LVTTL (3.3V)
C11
GPI3
General purpose input 3
Rear I/O module
LVTTL (3.3V)
D10
GPO2
General purpose output 2
CP3004-SA
LVTTL (3.3V)
C13
GPI4
General purpose input 4
Rear I/O module
LVTTL (3.3V)