Category

I/O Controller

Chipset Controller

16550 UART

I /O Options Supported

Serial ports (4)

Maximum Onboard Memory

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1 - RJ-11

CN1

Serial port 3 - RJ-11

CN3

Serial port 2 - RJ-11

CN2

Serial port 4 - RJ-11

CN4

INPUT CLOCK FREQUENCY

Frequency

J1

ê 1.8432MHz

Pins 1 & 2, 4 & 5, 3 & 6 closed

18.432MHz

Pins 2 & 5 closed

9.216MHz

Pins 2 & 3, 4 & 5 closed

3.6864MHz

Pins 1 & 2, 5 & 6 closed

PORT 1 HANDSHAKE OPTIONS

Setting

J2

RTS/CTS handshake, DTR/DSR loopback

Pins 1 & 2, 4 & 5, 3 & 6 closed

RTS/CTS loopback, DTR/DSR handshake

Pins 1 & 4, 2 & 3, 5 & 6 closed

RTS/CTS loopback, DTR/DSR loopback

Pins 1 & 4, 3 & 6 closed

PORT 2 HANDSHAKE OPTIONS

Setting

J3

RTS/CTS handshake, DTR/DSR loopback

Pins 1 & 2, 4 & 5, 3 & 6 closed

RTS/CTS loopback, DTR/DSR handshake

Pins 1 & 4, 2 & 3, 5 & 6 closed

RTS/CTS loopback, DTR/DSR loopback

Pins 1 & 4, 3 & 6 closed

PORT 3 HANDSHAKE OPTIONS

Setting

J4

RTS/CTS handshake, DTR/DSR loopback

Pins 1 & 2, 4 & 5, 3 & 6 closed

RTS/CTS loopback, DTR/DSR handshake

Pins 1 & 4, 2 & 3, 5 & 6 closed

RTS/CTS loopback, DTR/DSR loopback

Pins 1 & 4, 3 & 6 closed

PORT 4 HANDSHAKE OPTIONS

Setting

J5

RTS/CTS handshake, DTR/DSR loopback

Pins 1 & 2, 4 & 5, 3 & 6 closed

RTS/CTS loopback, DTR/DSR handshake

Pins 1 & 4, 2 & 3, 5 & 6 closed

RTS/CTS loopback, DTR/DSR loopback

Pins 1 & 4, 3 & 6 closed