SC9351 Просмотр технического описания (PDF) - Silan Microelectronics

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SC9351

AUDIO SYSTEM CONTROL MCU

Silan Microelectronics 

SC9351

FUNCTION DESCRIPTIONS

1. MCU function description

1.1 Introduction to MCU

SC9351 adopts S51 MCU core with embedded 64KByte FLASH, supporting external instruction memory and

data memory extension. Standard 805x assembler and compiler can be used for software development and

maximum 4 hardware breaks supported in Debug mode are convenient for program development.

1.2 Introduction to address space

Instruction and data addresses are programmed separately and each occupies 64K address space.

z Data memory address assignment

Compatible with 8051, it also includes address of internal data memory (IDATA) and external data memory

(XDATA), which are accessed by MOV instruction and MOVX instruction respectively.

— Internal data memory

The address space of internal data memory is 0000H~00FFH including several memory areas which are

different in physical characteristics. The 128 bytes memory from 00H to 7FH is RAM. Different from general

8051, the 80 bytes memory from 30H to 7FH can be extended as special function register whose

addressing method is the same as RAM.

The 128 bytes memory from 80H to FFH is the overlap area of RAM and special function register, which are

distinguished by their different addressing method ( special function register is accessed by Direct

addressing commands, while the RAM is accessed by indirect addressing commands). Different from

general 8051, the 64 bytes (from C0H to FFH) can be extended as extra RAM that can be accessed by

indirect addressing commands.

00H-7FH

80H-FFH

RAM128x8

Extended

address space

RAM128x8

Special function register

Extended

address space

Overlap area

Special function

register

RAM64x8

30H-7FH

C0H-FFH

Address space of internal data memory

— External data memory

The address space of external data memory is 0000H~FFFFH which can only be accessed by MOVX

instruction. SC9351 integrates 8K bytes RAM with address of 0000H~1FFFH as external data memory

which can be extended to 64K according to the requirements.

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: //www.silan.com.cn

REV:1.0 2009.02.16

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