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42113901TH01 Rev.3 16 /

Oki Data CONFIDENTIAL

End

I/F BUSY OFF

Serial

I/F

I/F ACK Send

Parallel

I/F

LF Motor Phase

Initialization

Carriage Homing

RAM Clear

LSI Initial Setting

and I/F Busy ON

External RAM

CHECK

LSI RESET

ROM CHECK

Internal RAM

CHECK

MPU

Initial Setting

MPU RESET

Start

2.1.3 Initialization

This printer is initialized when the power is turned on or when the I-PRIME-N signal is input

from the host side via the parallel interface.

For the initialize operation, the RST-N signal is first output from the reset circuit to reset the

MPUs and LSIs. When resetting ends, the program starts and the LSIs are reset by MPU via

LSIRST-N. Reset operation by I-PRIME starts program to initialize, but does not reset the MPU.

The program here sets the mode of the LSI including the MPU, checks the memories (ROMs

and RAMs), then carries out carriage homing, and determines the LF motor phase.

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 inform the ready state for receiving to the

host side and ends the initialize operation.

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