40496501TH Draft Version 202.1.3 InitializationThis printer is initialized when the power is tumed on or when the I-PRIME-N signal is input fromthe host side via the parallel interface.For the initialize operation, the RESET-N signal is first output from the reset circuit to reset the MPUand LSIs. When resetting ends, the program starts and the LSIs are reset by NHDC LSI viaLRESET-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 andRAMs), 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 hostside and ends the initialize operation.Figure 2.7EndI/F BUSY OFFSerialI/FI/F ACK SendParallelI/FLF Motor PhaseInitializationCarriage HomingRAM ClearLSI Initial Settingand I/F Busy ONExternal RAMCHECKLSI RESETROM CHECKInternal RAMCHECKMPUInitial SettingMPU RESETStart
