Workstation 5 Field Service Guide
2-29
Workstation 5 System Board Technical Descriptions
Point Of Sale Interfaces
COM 5 Modular RS232 Port (REF: ABRD88 - Sheets 16 and 19)
COM 5 is an 8-pin modular RS232 port assigned to UART2 in U8, Super IO
Number 1. U12, a GD75232 line driver/receiver combines three drivers and
five receivers from the industry standard 75188 and 75189 quadruple bipolar
drivers and receivers. The device packaging implements a flow through design
to ease interconnection of the UART and serial port connector.
Figure 2-15: COM 5 Modular RS232 Port
COM1 DB9 Port (REF: ABRD88 - Sheets 16 and 19)
COM 1 is an RS232 interface based on a DB9 connector and assigned to
UART 1 in U8, Super IO Number 1. It is primarily used for printing
applications.
Figure 2-16: COM1 RS232 Interface
