參數(shù)資料
型號: SM89516
廠商: Electronic Theatre Controls, Inc.
英文描述: 8 - Bit Micro-controller with 64KB flash & 1KB RAM embedded
中文描述: 8 -位微控制器,64KB閃存
文件頁數(shù): 6/19頁
文件大?。?/td> 436K
代理商: SM89516
May 2001
Specifications subject to change without notice,contact your sales representatives for the most recent information.
6/19 Ver 1.3 PID 89516 05/01
SyncMOS Technologies Inc. SM89516
Data Memory
The SM89516 has 1K bytes on-chip RAM, 256 bytes of it are the same as general 8052 internal memory
structure while the expanded 768 bytes on-chip RAM can be accessed by external memory addressing method.
(by instruction MOVX)
FF
80
7F
00
FF
80
Expanded 768 bytes (Accessed
direct external addressing
by instruction MOVX)
mode,
02FF
0000
Data Memory - Lower 128 byte
Data memory $00 to $FF is the same as 8052
The address $00 to $7F can be accessed by direct and indirect addressing modes.
Address $00 to $1F is register area.
Address $20 to $2F is memory bit area.
Address $30 to $7F is for general memory area.
Data memory - Higher 128 byte
The address $80 to $FF can be accessed by indirect addressing mode only.
Addressing $80 to $FF is data area.
Data Memory - Expanded 768 bytes
From external address $0000 to $02FF is the on-chip expanded RAM area, total 768 bytes. This area can be
accessed by external direct addressing mode only (by instruction MOVX).
Higher 128 bytes (Access by
indirect addressing mode only)
SFR (Accessed by direct
addressing mode only)
Lower 128 bytes (Accessed by
direct & indirect
by
addressing mode)
(OME = 1)
Internal RAM Control Register (RCON, $85)
bit-7
bit-0
Read :
Write :
Reset value :
Unused
Unused
Unused
Unused
Unused
Unused
RAMS1
RAMS0
*
*
*
*
*
*
0
0
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