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參數資料
型號: W921F840
廠商: WINBOND ELECTRONICS CORP
英文描述: 4-Bit Microcontroller(4位的微控制器)
中文描述: 4位微控制器(第4位的微控制器)
文件頁數: 12/68頁
文件大小: 451K
代理商: W921F840
W921F840
- 12 -
6.2 RAM Memory Map
000H
Speical Control Registers
Serial Buffer Registers
Stack Registers or
General Registers
General Registers
03FH
040H
04FH
050H
07FH
080H
0FFH
100H
17FH
180H
1FFH
200H
000
063
064
079
080
127
128
255
256
383
384
511
512
Working Registers
1023
3FFH
General Registers
Serial Buffer Registers or
(040H to
0FFH)
(050H to
14EH)
General
Registers
Serial
Buffer
Registers
Stack
Registers
(040H to
1FFH)
(512 x 4-bit) + (1024 x 4-bit)
Bank2
Bank3
6.2.1 Special Control Register Area
There are 64
×
4-bit registers in the special control register area. All control registers such as DTMF
control register, serial speed control register, ..., etc. are in this area. Please refer to the following
table for detailed register map.
ADDR.
000H
001H
002H
003H
004H
005H
006H
007H
008H
009H
00AH
DESCRIPTION
ABBREVIATION
(SYSCCR)
(BKSR)
(FEPCR1)
(P4PH)
(P4TP)
(P6PH)
(P6TP)
(PABCDPH)
(PABCDTP)
(SRLNR)
(SRMNR)
INITIAL VALUE
00H
02H
0FH
00H
00H
00H
00H
00H
00H
02H
00H
Reserved or System Clock Control Register
Bank Select Register
Flash EEPROM Control Register 1
Port P4 Pull High Resistor Register
Port P4 Output Type Register
Port P6 Pull High Resistor Register
Port P6 Output Type Register
Port PABCD Pull High Resistor Register
Port PABCD Output Type Register
Serial LSB Nibble Register
Serial MSB Nibble Register
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