3
CIRCUIT DESCRIPTION
3.1 Main B’D
3.1.1 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, Image control part (CHORUS-2) controlling input of image received from
media and conversion. The following nomenclatures by section is the same as those listed in the circuit diagram.
3.1.2 MEMORY MAP
The entire Addressing area provided by MAIN CONTROLLER(S3C46Q0X) 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 2M/8M BYTES SDRAM and 1M BYTES ROM(FLASH MEMORY). In case of SDRAM0, it uses
0x0000000h ~ 0x01BFFFFFFh area.
3. Circuit Description
<Figure 1. S3C46Q0X MEMORY MAP>
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