S3C8639 Просмотр технического описания (PDF) - Samsung

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Компоненты Описание

производитель

S3C8639

8-bit single-chip CMOS microcontrollers

Samsung 

S3C8639/C863A/P863A/C8647/F8647

ADDRESS SPACES

REGISTER ARCHITECTURE

The upper 64-byte area of the S3C8639/C863A/C8647 files is logically expanded to two 64-byte areas, called set

1 and set 2. The upper 32-byte area of set 1 is divided into two register banks, bank 0 and bank 1. The total

physical register space is thereby expanded internal register to 864/1120 bytes. Within this physical space, there

are 864/1120/462-byte registers, of which 852/1108/450 are addressable.

Given the microcontroller’s 8-bit register bus architecture, up to 256 bytes of physical register space can be

addressed as a single page. The S3C8639 register files have three pages, page 0, page 1 and page 2. And the

S3C863A register files have four pages, page 0, page 1, page 2 and page 3. The S3C8647 register files have

two pages, page 0, and page 1. All page contain 256 bytes respectively.

The extension of physical register space into separately addressable areas (sets, banks, and pages) is enabled

by addressing mode restrictions, the select bank instructions SB0 and SB1, and the register page pointer, PP.

Specific register types and areas (in bytes) they occupy in the S3C8639/C863A/C8647 internal register files are

summarized in Table 2-1.

Table 2-1. Register Type Summary

Register Type

General-purpose registers (including the 16-byte

common working register area)

CPU and system control registers

Clock, peripheral, I/O control, and data registers

Total Addressable Bytes

Number of Bytes

(S3C8639/C863A)

784/1040

19

49

852/1108

Number of Bytes

(S3C8647)

400

19

43

462

2-3

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