UPD61P24CS NEC, UPD61P24CS Datasheet - Page 9

• Manufacturer Part Number: UPD61P24CS
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC

11. PIN FUNCTIONS
11.1
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
level inside the LSI.
11.2
This is the 8-bit I/O pin for key-scan output. When the control register (P
At reset (all cleared), the value of I/O mode and output latch becomes undefined.
When K
K
K
I/O
I/O
Input/output selection
I/O
Pin (P
Pull-Down Resistor Configuration
is set to the input mode, pull-down resistor R is turned on.
Output signal
0
Input signal
)
P
0
K
I/O7
K
I/O6
Figure 11-1. K
P
10
K
I/O5
K
I/O4
I/O
CMOS
Pin Organization
K
I/O3
R
K
I/O2
Pull-down resistor
N-ch
P
00
K
1
I/O1
) is set for the input port, the port can
V
DD
Control register
P-ch
N-ch
K
V
I/O0
SS
(P )
1
PD61P24
Pin
SS
9