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| 型號： | UPD17244MC-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)： | 44/102頁 |
| 文件大小： | 461K |
| 代理商： | UPD17244MC-XXX-5A4 |
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44
Data Sheet U15002EJ1V0DS
μ
PD17240, 17241, 17242, 17243, 17244, 17245, 17246
3.13 Selecting Standby Mode Release Condition and Whether Pull-Up or Pull-Down Resistor
Is Connected (Port 1A)
The standby mode release condition and whether a pull-up or pull-down resistor
Note
is connected to P1A can be
specified in 1-bit units by using the following register file.
Note
Specify whether a resistor is connected or not by using P1ABPU (address 07H) of the register file.
(1) When key matrix is used (P1AKEYn = 1)
P1AHL0
0
1
0
P1AHL0
Address
RF: 05H
After reset
0H
R/W
R/W
1
P1AHL1
2
P1AHL2
3
0
Resistor is connected (P1ABPU0 = 1)
Resistor is not connected (P1ABPU0 = 0)
Connects pull-down/pull-up resistor to P1A
0
and
selects standby mode release condition
Pull-up resistor
Standby mode is released when a low level is input to P1A.
Pull-down resistor
Standby mode is released when a high level is input to P1A.
No resistor
No resistor
P1AHL1
0
1
Resistor is connected (P1ABPU1 = 1)
Resistor is not connected (P1ABPU1 = 0)
Connects pull-down/pull-up resistor to P1A
1
and
selects standby mode release condition
Pull-up resistor
Standby mode is released when a low level is input to P1A.
Pull-down resistor
Standby mode is released when a high level is input to P1A.
No resistor
No resistor
P1AHL2
0
1
Resistor is connected (P1ABPU2 = 1)
Resistor is not connected (P1ABPU2 = 0)
Connects pull-down/pull-up resistor to P1A
2
and
selects standby mode release condition
Pull-up resistor
Standby mode is released when a low level is input to P1A.
Pull-down resistor
Standby mode is released when a high level is input to P1A.
No resistor
No resistor
Remark
P1AKEY: Address 06H of register file
P1ABPU: Address 07H of register file
n = 0 to 2
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