Samsung sf150t Service Manual

Also see for SF-150T: Operator's guide

Contents

SF150T 5-15. Circuit Description5-1 GeneralThe main circuit board controls the machine, and consists of Super Fax Chip (KS16118), External memory,CODEC circuit with modem-TX and RX signal path and some parts of the Line Interface Unit, Digital TADcircuit with DSP amd DRAM, witch controls the system.5-2 System Control SectionThis circuit consists of the EP-ROM and SRAM, external Real Time Clock crystal, RTC and memory back-upcircuitry, and the Super Fax Chip (KS16118).The KS16118 Super Fax Chip is an integrated 9600 bps modem, image processor, 8-bit MPU, peripheralcontroller, and analog front end circuit on a single-chip.Peripheral functions inculde 2-channel SI0, 3-channel DMA, 6-bit Half flash A/D converter, scanner andvideo processor units, TPH interface, CODEC unit, and tone generator.Modem is a 9600 bps, half duplex monolithic device incorporating digital filters, a Samsung SSP1600 digitalsignal processor and CPU-Interface logic.Figure 5-1: KS16118 External Memory Map1FFFH0100H00FFH0000H 0000HFFFFHFF80HFF7FHFF00HFEFFH/DMS(SRAM)PeripheralPCS0DSP /CSPCS1InterruptVectors/PMS(EP-ROM)[ Program Memory ] [ Data Memory ]5-2-1 Memory MapThe external memory of the CPU is devided into, 1 byte(FF00H) DSP chip select, 32kbyte SRAM (0000Hthrough 7FFFH) and 128kbyte EP-ROM (0100H through 1FFFH).