42113901 Rev.2 16 /Oki Data CONFIDENTIALEndI/F BUSY OFFSerialI/FI/F ACK SendParallelI/FLF Motor PhaseInitializationCarriage HomingRAM ClearLSI Initial Settingand I/F Busy ONExternal RAMCHECKLSI RESETROM CHECKInternal RAMCHECKMPUInitial SettingMPU RESETStart2.1.3 InitializationThis printer is initialized when the power is turned on or when the I-PRIME-N signal is inputfrom the host side via the parallel interface.For the initialize operation, the RST-N signal is first output from the reset circuit to reset theMPUs and LSIs. When resetting ends, the program starts and the LSIs are reset by MPU viaLSIRST-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 (ROMsand 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 thehost side and ends the initialize operation.
