Samsung MSYS 5150 Service Manual

Also see for MSYS 5200: User guide

5-2 Samsung ElectronicsCircuit Description5-1-2 MFP Controller (KS32C6100 : U1)Fig.5-2. Uart Block DiagramSYSTEM CLOCKThe internal clock frequency is 33MHz 66MHz systemclock (MCLK) supplied from the outside is used beingdivided inside.D ATA & ADDRESS BUS CONTROL• /RD & /FMEM_WR, /WR/RD & /FMEM_WR signals are synchronized withMCLK(33MHz) and become LOW ACTIVE.These signals are strobe signals used to read andwrite data when each CHIP SELECT is connectedwith /RD and /WR pin of RAM, ROM, MODEMand the outside devices and becomes active./WR is strobe signal used only write signal forSCAM image processor.• CHIP SELECT (/SDIP_CS, /RCS0, /RCS2, /MCS,/SCS-/SDIP_CS : SCAN MEMORY CHIP SELECT (LOWACTIVE)-/RCS0 : FLASH MEMORY CHIP SELECT (LOWACTIVE)-/RCS2 : MASK ROM CHIP SELECT (LOWACTIVE)- /MCS : MODEM CHIP SELECT (LOW ACTIVE)- /SCS : SRAM CHIP SELECT (LOW ACTIVE)• D0 - D31- 32bit data bus• A0 - A23-ADDRESS BUS (A22 - A23 arereserved.)SERIAL C O M M U N I C ATION PA RTU A RT (Universal AsynchronousReceiver/Transmitter) at KS32C6100 enables the mainand LIU, main and OPE to transmit serial data. Theblock diagram of UART is as follows:KS32C6100 has two UART channels. The baud rate is9600bps.