Circuit Description; Main Pba; General Description; Memory Map - Samsung SCX-1150F Repair Manual

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3. Circuit Description

◊ MAIN PBA

3-1. GENERAL DESCRIPTION

Main circuit consists of mainly consists of CPU and the controller part with various types of built-in I/O device driver(built-in
RISC Processor Core: ARM7TDMI), system memory part, OA980 controlling input of image received from media and con-
version, CF(COMPACT storage card) interface part. The following nomenclatures by section is the same as those listed in
the circuit diagram.

3-2. MEMORY MAP

The entire Addressing area provided by MAIN CONTROLLER(S3C46MOX(Jupiter3)) is 256MBytes from 0x00000000 to
0x10000000, and the Max. Address Range for each External Chip Select is 32M Byte or Half word from 0x000000 to
0x01FFFFFF and embodied with Big-Endian Bus interface. MEMORY area is divided into EXTERNAL ROM and RAM
areas(See (Figure 1)), and the areas actually used are 8M/8M BYTES SDRAM and 1M BYTES ROM(FLASH MEMORY).
0x0FFF_FFFF
0x0E00_0000
0x0DFF_FFFF
0x0C00_0000
0x0BFF_FFFF
0x0A00_0000
0x09FF_FFFF
0x0800_0000
0x07FF_FFFF
GCS 3 Area - EXTENDED GPIO
0x0600_0000
0x05FF_FFFF
0x0400_0000
0x03FF_FFFF
0x0200_0000
0x01FF_FFFF
0x01C0_0000
0x000F_FFFF
used)
0x0000_0000
Samsung Electronics
GCS 7 Area
GCS6 Area - DRAM(8MB)
Reserved
GCS 4 Area - OA980 PO CS
GCS 2 Area - MODEM
GCS 1 Area - OA980
Special Registers
Program Area(1MB
<Figure 1. S3C46MOX(Jupiter3) MEMORY MAP>
CIRCUIT DESCRIPTION
SDRAM(8MB)
USER MEMORY(3MB Start ~ )
0xC300000
PIXEL TO LINE BUFFER(30KB)
0xC2CBC20
Chunk Buffer(8KByte)
0xC2C9C20
Read Print Buffer (32Byte)
0xC2C9C00
Swath Buffer(300KBy te)
0xC27EC00
Scan Buffer(810KB)
0xC1B4400
RGB Buffer(30KB)
0xC1ACC00
ECM Buffer(64KB)
0xC19CC00
RCP PC FAX Buffer(15KB)
0xC199000
JPEG DECODE BUFFER(64KB)
0xC099000
MDM Out Buffer(20KB)
0xC094000
MDM In Buffer(28KB)
0xC08D000
JPEG INPUT Buffer(220KB)
0xC056000
System AREA(344K)
0xC000000
Flash memory(1MB)
OASIS Rom Code : 256KB
(Sector 15 ~ Sector 18)
J3 ROM Code :704KB
(Sector 4 ~ Sector 14)
Backup Data(Sector 3:32KB)
Not Used(Sector 1,2: 16 KB)
Boot Rom Code(Sector 0 : 16KB)
Repair Manual
3-1