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參數(shù)資料
| 型號： | UPD17246MC-xxx-5A4 |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS |
| 中文描述： | 4位單片微控制器的小型通用兩用紅外遙控遞質(zhì) |
| 文件頁數(shù)： | 23/102頁 |
| 文件大?。?/td> | 461K |
| 代理商： | UPD17246MC-XXX-5A4 |
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Data Sheet U15002EJ1V0DS
μ
PD17240, 17241, 17242, 17243, 17244, 17245, 17246
(5) General-purpose data memory
The general-purpose data memory area is an area of the data memory excluding the system register area,
and the port register area. This memory area has a total of 447 nibbles (111 nibbles in BANK0 and 336 nibbles
(112 nibbles
×
3) in BANK1 to BANK3).
Figure 2-6. Configuration of Data Memory (1/2)
Notes 1.
Address 6FH of BANK1 can be used as a general-purpose data memory area.
2.
Bits 0 to 2 of address 70H of BANK1 are used. Bit 3 is fixed to 0.
3.
Only bit 0 of address 71H of BANK1 is used. Bits 1 to 3 are fixed to 0.
Caution No data can be written to or read from addresses 72H and 73H of BANK1.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
BANK 0
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
BANK 1
System register (SYSREG)
Example
Address 1AH
in BANK 0
System register (SYSREG)
R
R
Column address
Data buffer (DBF)
P0A P0B P0C P0D
P0E
Column address
0
1
2
3
4
5
6
7 P1A
Note 1
P1B
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