Technical Description
PMS8232 / PMS4232 Page
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Technical Description
The
PMS8232
utilizes the 16C554 UART. This chip features programmable baud rate, data format,
interrupt control and a 16-byte input and output FIFO, and is functionally 4 16C550 UARTs. The 16C654
UART is also available on this card, which has a 64-byte FIFO as opposed to the 16-byte FIFO available
in the 16C554 and the 16C854 which has a 128-byte FIFO.
Connector Pin Assignments
DB-9 (EIA-574 DTE)
Signal
Name
Pin #
Mode
GND
Ground
5
TD
Transmit Data
3
Output
RTS
Request To Send
7
Output
DTR
Data Terminal Ready
4
Output
RD
Receive Data
2
Input
CTS
Clear To Send
8
Input
DSR
Data Set Ready
6
Input
DCD
Data Carrier Detect
1
Input
RI
Ring Indicator
9
Input