參數(shù)資料
型號: UPD64GS
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
中文描述: 4位單片機的紅外遙控傳輸
文件頁數(shù): 18/68頁
文件大?。?/td> 301K
代理商: UPD64GS
18
μ
PD63, 63A, 64
3.4 Control Register 1 (P4)
Control register 1 consists of 8 bits. The contents that can be controlled are as shown below.
When reset, the register becomes 0010 0110B.
Table 3-6. Control Register 1 (P4)
Bit
b
7
b
6
b
5
b
4
b
3
b
2
b
1
b
0
Name
K
I
S
0
/S
1
S
1
/LED
K
I/O
S
0
Pull-down Pull-down
mode
mode
mode
Set
0
Fixed
Fixed
OFF
OFF
Fixed
S
1
IN
OFF
value
1
to “0”
to “0”
ON
ON
to “0”
LED
OUT
IN
When reset
0
0
1
0
0
1
1
0
b
0
b
1
: Specifies the input mode of the S
0
port. “0” = OFF mode (high impedance); “1” = IN (INPUT mode).
: Specifies the I/O mode of the K
I/O
port.
“0” = IN (INPUT mode); “1” = OUT (OUTPUT mode).
: Specifies the I/O mode of the S
1
/LED port. “0” = S
1
(INPUT mode); “1” = LED (output mode).
: Specifies the availability of the pull-down resistor in S
0
/S
1
port INPUT mode. “0” = OFF (unavailable);
“1” = ON (available)
: Specifies the availability of the pull-down resistor in K
I
port. “0” = OFF (unavailable);
“1” = ON (available).
b
2
b
4
b
5
Remark
In OUTPUT mode or in OFF mode, all the pull-down resistors are automatically disconnected.
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