Oki ML490 Maintenance Manual - Page 16
and RAMs, then carries out carriage homing, and determines the LF motor phase.
View all Oki ML490 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 16 highlights
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. Start MPU RESET MPU Initial Setting Internal RAM CHECK ROM CHECK LSI RESET LSI Initial Setting and I/F Busy ON External RAM CHECK RAM Clear LF Motor Phase Initialization Carriage Homing Serial I/F I/F BUSY OFF Parallel I/F I/F ACK Send End 42114101 Rev.1 16 /