![Kontron CP3003-SA User Manual Download Page 64](http://html1.mh-extra.com/html/kontron/cp3003-sa/cp3003-sa_user-manual_1996263064.webp)
Functional Description
CP3003-SA
Page 2 - 24
ID 1052-6929, Rev. 3.0
D R A F T — F O R I N T E R N A L U S E O N L Y
2.11.10.4 Rear I/O Pin Description
Serial Ports
The CP3003-SA provides two serial ports, COMA and COMB, both available on the rear I/O
CompactPCI 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)
CP3003-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)
CP3003-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)
CP3003-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)
CP3003-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)
CP3003-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)
CP3003-SA
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.