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參數資料
| 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： | 9/25頁 |
| 文件大?。?/td> | 466K |
| 代理商： | SM79164L25Q |
Specifications subject to change without notice,contact your sales representatives for the most recent information.
9/26
Ver 2.1
SM79164 08/2006
SyncMOS Technologies International. Inc. SM79164
With this bank mapping scheme, user can access entire 4k byte on-chip RAM with direct addressing method. That means
using the window area ($040~$07F), user can access any bank (64 byte) data of 4k byte on-chip RAM space which is
selected by BS[5:0] of data bank control register (DBANK, $86).
For example, user write #30h to $101 address:
MOV DBANK, #88H ; set bank mapping $040~$07f to $0100~$013f
MOV A, #30H ; store #30H to A
MOV 41H, A ; write #30H to $0101 address
Data Bank Control Register (DBANK, $86)
Data bank select enable bit BSE = 1 enables the data bank select function
Data bank select enable bit BSE = 0 disables the data bank select function
BS[5:0] setting will map $040~$07F RAM space to entire 4k byte on-chip RAM space.
Internal RAM Control Register (RCON, $85)
SM79164 has 3840 byte on-chip RAM which can be accessed by external memory addressing method only. (By
instruction MOVX). The address space of instruction MOVX @Rn is determined by bit 3, bit2, bit1, bit 0
(RAMS3, RAMS2, RAMS1, RAMS0) of RCON. The default setting of RAMS3, RAMS2, RAMS1, RAMS0 bits
is 0000 (page0).
bit-7
BSE
R/W
0
bit-0
BS0
R/W
1
Unused
-
*
BS5
R/W
0
BS4
R/W
0
BS3
R/W
0
BS2
R/W
0
BS1
R/W
0
Read / Write:
Reset value:
bit-7
Unused
-
*
bit-0
RAMS0
R/W
0
Unused
-
*
Unused
-
*
Unused
-
*
RAMS3
R/W
0
RAMS2
R/W
0
RAMS1
R/W
0
Read / Write:
Reset value:
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