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ER-A410/ER-A420 HARDWARE DESCRIPTION

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12. PRINT RATIO LIMITATION

Max. 288dot/1line x 140line (Corresponds to black background LOGO

print.)

Ave. 108dot/1line or less (Corresponds to 12.5% of all dots.)

13. BUZZER

A buzzer of piezo type is used.

The oscillation frequency is 4.0kHz m 0.5kHz.

14. RESET

The RESET signal is generated under the following condition.

1) When the MODE KEY SWITCH is moved from SRV’ to another

position (except for OFF).

15. POFF

The POFF signal is changed from 0 to 1 when the 5V system power

and the 24V system power reach the operating voltage. When they fall

below the operating voltage, the signal is changed from 1 to 0.

POFF, RESET TIMING CHART

16. I/O

<LED Segment Signal> Write

<Serial I/O ch2 receive signal> Read

<LCD Write Data> Write

<Key Return Signal, Key Exchange Signal> Read

<LCD Read Data> Read

<LCD Control Signal/Key Strobe Signal> Write

<Key Return Signal> Read

<LCD Control Signal/Key Strobe Signal> Write

<EFT Data> Write/Read

<EFT Status> Read

+5V

+24V

RESET

POFF

EFTRES

20.8V

POWER ON Instant service

interruption

MODE

SRV'

MODE

Other than

SRV'

POWER OFF