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參數(shù)資料
| 型號： | SM79164L25Q |
| 廠商： | 新茂國際科技股份有限公司 |
| 英文描述： | 8 - Bit Micro-controller with 64KB flash & 4KB RAM embedded |
| 中文描述： | 8 -位微控制器，64KB閃存 |
| 文件頁數(shù)： | 7/25頁 |
| 文件大小： | 466K |
| 代理商： | SM79164L25Q |
Specifications subject to change without notice,contact your sales representatives for the most recent information.
7/26
Ver 2.1
SM79164 08/2006
SyncMOS Technologies International. Inc. SM79164
FF
80
7F
00
FF
80
0EFF
0000
Higher 128 bytes (Access by
indirect addressing mode only)
SFR (Accessed by direct
addressing mode only)
Lower 128 bytes (Accessed by
direct & indirect addressing mode)
Expanded 3840 bytes RAM
(Accessed by direct external
addressing mode, by instruction
MOVX, or by Bank mapping
direct addressing mode)
On-chip expanded RAM address structure.
1.2.1 Data Memory - Lower 128 byte ($00 to $7F, Bank 0 & Bank 1)
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.
1.2.2 Data Memory - Higher 128 byte ($80 to $FF, Bank 2 & Bank 3)
The address $80 to $FF can be accessed by indirect addressing mode or by bank mapping direct addressing mode.
Address $80 to $FF is data area.
1.2.3 Data Memory - Expanded 3840 bytes ($0000 to $0EFF, Bank 4 ~ Bank 63)
From external address $0000 to $0EFF is the on-chip expanded RAM area, total 3840 bytes. This area can be accessed
by external direct addressing mode (by instruction MOVX) or by bank mapping direct addressing mode as described
below:
1.3 Bank mapping direct addressing mode
:
We provide RAM bank address ‘40H~7FH’ as mapping window which allow user access all the 4KB on-chip RAM through
this RAM bank address.
That means using direct addressing mode can access all the 4KB on-chip RAM. Please see next page for the mapping
mode table.
(OME = 1)
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