Service manual

EPSON ELP-3500 Service Manual

1-15

1.6 INTERFACE SPECIFICATIONS

1.6.1 Mouse Interface Specifications

Features

This interface is provided on an optional cable (not on the projector).

❐

Supports a keyboard as well as a mouse

❐

Mini DIN 6-pin connector

❐

I/O data communication is enabled.

PS/2 port pin assignments

Figure 1-26. Mini DIN 6-pin Connector

Table 1-3. PS/2 Connector Pin Assignments

Pin Signal Functions

1 Data I/O data bus. The signal line with the open collector driver is pulled

up to 5 V through a pull-up resistor.

2 NC Not connected

3 GND Ground

4 +5V +5 V output

5 Clock Synchronous clock signal. The signal line with the open collector

driver is pulled up to 5 V through a pull-up resistor.

6 NC Not connected

PS/2 port driving procedure

The projector communicates with the peripherals using the IBM PC/AT protocol,

which manipulates the HIGH/LOW level of Data/Clock signals.