Initialization - Oki Microline 520 Service Handbook

2.1.02

Initialization

This printer is initialized when the printer is powered on or when the I-PRIME-N signal is input
from the host via the parallel interface.
The steps in Printer Initialization are listed below.
The RST-N signal is output from the reset circuit to reset the MPU and LSIs.
The program is executed and the LSIs are reset by the MPU via IORST-N.
NOTE:
A reset operation initiated by I-PRIME does not reset the MPU.
The program sets the LSI (02D) mode, checks the memory (ROM/RAM), then executes
carriage homing and determines the phase of the line feed motor.
Finally, the program establishes the interface signals (P-I/F: ACK-P signal sending, and
S-I/F: BUSY-N signal off) and lights the SELECT lamp to indicate that the printer is in
the ON-LINE state.
Principles of Operation 2 - 6 Microline 520/521 Service Handbook
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