Interface - Epson PX-8 Technical Manual

REV.-A
1.4 Interface
As shown in Table 1-3, the unit has eleven connectors: among them, CN3, CN4 and CN5 have a
slide-lock mechanism.
Table 1-5 Interface Connectors
Name
Number
Function
of pins
CN1 3 AC adapter connection interface
CN2 2 Main battery connection interface
CN3 20
Incorporated microcassette interface
CN4 22 Keyboard interface
CN5 16 LCD interface
CN6 8 High speed serial interface
CN7 8 RS-232C interface
CN8 50 Expansion interface
CN9
3 Bar code reader interface
CN10 3 Analog input interface
CN11 2 External speaker interface
Note: CN5 is integrated on the back of MAPLE board.
Table 1-6 CN 1 (AC Adaptor) Pin Assignments
Pin No.
Signal name Definition
1 VCH Charging voltage
2 - Undefined
3 GND Ground
Table 1-7 CN2 (Battery Connection) Pin Assignments
Pin No. Signal Name Definition
1
VB
Main battery voltage
2 GND Ground
1-8