Sharp ER-A450T Service Manual - Page 14

2) Block diagram A23~A0 IRLON ROS1 ROS2 RAS1 RAS2 RAS3 OPTCS D0~D7 AS RD WR RDO WRO Φ RESET RES VRESC POFF MD0 MD1 WAIT EXWAIT RJRST SLRST *PRST RJTMG SLTMG PTMG Address decode External CS Internal CS RASEL Image control SSP comparison register BAR. SSPRQ Buffer Read/write control WAIT control CAPS select Print gate I/R Control IRTX IRRX RCI ASKRX Φ Divider CHS serial select Multiplexer INTO control Print mode PMD TXDI SCKI RXDI HTS1 SCK1 STH1 HTS2 SCK2 STH2 INT4 INT1 INT2 INT3 EXINT0 EXINT1 EXINT2 EXINT3 IRQ0 TEST Print pulse control Printer control port Motor drive MTD MTD RJMTR SLMTD SLMTS SLMTR SLMTD * Output selection with CAPS. PRST/PTMG. SLF SLRS VF RF JF FCUT PCUT STAMP TRGI SDT1~7 DT1~9 TRG DOTEN TRG Fig. 2-4 4 - 6