參數(shù)資料
型號: UPD6104C001
英文描述: Consumer IC
中文描述: 消費(fèi)性IC
文件頁數(shù): 9/36頁
文件大?。?/td> 252K
代理商: UPD6104C001
μ
PD61P24
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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