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參數(shù)資料
| 型號(hào)： | UPD6124ACS |
| 廠(chǎng)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(yè)數(shù)： | 9/36頁(yè) |
| 文件大?。?/td> | 172K |
| 代理商： | UPD6124ACS |
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μ
PD6124A, 6600A
9
11. PIN FUNCTIONS
11.1
K
I/O
PIN (P
0
)
This is the 8-bit I/O pin for key-scan output. When the control register (P
1
) is set for the input port, the port can be
used as an 8-bit input pin. When the port is set for the input mode, all of these pins are pulled down to the V
SS
level
inside the LSI.
At reset (all cleared), the value of I/O mode and output latch becomes undefined.
Figure 11-1. K
I/O
Pin Organization
K
I/O7
K
I/O6
K
I/O5
K
I/O4
K
I/O3
K
I/O2
K
I/O1
K
I/O0
P
0
P
10
P
00
(P )
Control register
11.2
K
I/O
PULL-DOWN RESISTOR CONFIGURATION
V
DD
V
SS
CMOS
N-ch
Pin
Pull-down resistor
Input signal
Output signal
Input/output selection
N-ch
P-ch
R
When K
I/O
is set to the input mode, pull-down resistor R is turned on.
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