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參數(shù)資料
| 型號： | UPD6125AG |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
| 中文描述： | 4位單片機(jī)的遙控傳輸 |
| 文件頁數(shù)： | 10/40頁 |
| 文件大?。?/td> | 286K |
| 代理商： | UPD6125AG |
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μ
PD6125A, 6126A
10
11.3 I/O Pin (P
3
, P
4
Note
)
P
3
/P
4
are input/output pins for adding a key matrix. The LSB of control registers P
13
and P
14
switches between
input and output modes.
When in input mode, all pins are pulled down by the LSI to the V
SS
level.
When “all clear” is input or on reset, input mode goes into effect, and the output latch value becomes undefined.
Figure 11-2. I/O Pin Organization
IN/OUT
I/O
3
I/O
2
I/O
1
I/O
0
P
3
/P
4
IN/OUT
0 ······· Input mode
1 ······· Output mode
P
13
, P
14
Note
P
03
, P
04
Note
P3 ··· I/O
00
to I/O
03
,
P4 ··· I/O
10
to I/O
13
Note
μ
PD6125A is not equipped with P
13
, P
14
, P
03
, and P
04
.
11.4 I/O Pull-Down Resistor Organization
Input/output selection
CMOS
R
Nch
Pull-down resistor
I/O pull-down resistor switch
(Mask option)
V
DD
P-ch
N-ch
V
SS
Pin
Output signal
Input signal
The use of pull-down resistors for I/O can be selected by using the mask option.
When the pull-down resistor switch is turned on (1 is set) by the mask option, the pull-down resistor R is turned
on only in input mode.
Caution
When using the pins as key switches, turn on the pull-down resistor switch by the mask option.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD6126A | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
| UPD6126AG | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
| UPD6127CS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Remote-Control Transmitter/Encoder |
| UPD6127GS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Remote-Control Transmitter/Encoder |
| UPD6129CS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Remote-Control Transmitter/Encoder |
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