Circuit Description - Samsung SF700AT Service Manual

5. Circuit Description

5-1 General
The main circuit board consists of memory, MODEM, TX- and RX-related circuitry, Speakerphone, TAD,
and the Integrated Facsimile Controller (IFC), which includes the CPU and I/O device drivers and controls
the system.
5-2 IFC
This circuit consists of the data and address bus, real time clock (RTC), image sensor, motor driver
controller, Thermal Print head controller, IFC including I/O port, and system reset circuit.
5-2-1 Memory Map
The external memory of the CPU is divided into
32kB RAM (0000H through 8000H) and 64kB ROM
(FF0000H through FFFFFFH).
CPU (Logical) Address Space
FFFFFF
ROMCSn
F00000
Not
Available
0FFFFF
CS0n
000000
SF700AT
00FFFF
MCSn
00FF00
Internal
Registers
00FE00
CS2n -
CS4n
00FD00
CS1n
00FC00
Internal
Memory
00E000
Figure 5-1: XFC-B Memory Map
00FEFF
Reserved
00FEE0
Setup
Registers
00FE80
Operational
Registers
00FE00
00FDFF
CS4n
00FDC0
CS3n
00FD80
CS2n
00FD00
00FBFF
Reserved
00FBE0
Shading Inversion
00FBD0
DBCMC Buffer
00FBC0
Dither Table
00FB80
Reserved
00E000
5-1