UPD6P8 NEC [NEC], UPD6P8 Datasheet - Page 87

• Manufacturer Part Number: UPD6P8
• Description: MOS INTEGRATED CIRCUIT 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

• Remote-control transmitter (56 keys accommodated, mode selection switch accommodated)
Note S
Data can be read from the K
to these pins (which then become high level when the switch is on and low level when off). Set the K
K
for the same key input.
A pull-up resistor can be connected to any of pins K
a pull-up resistor is connected to the K
I/O7
pins to input mode at this time. Reading data from these pins enables multiple output data to be obtained
2
: Set to STOP mode release enabled
+
I/O0
K
K
S
S
REM
V
X
X
GND
S
I/O6
I/O7
0
1
DD
OUT
IN
2
/LED
Note
to K
I/O7
I/O5
pins by connecting a pull-up resistor of approx. 50 kΩ and a switch
Data Sheet U17848EJ3V0DS
pin).
I/O0
K
K
K
K
K
K
I/O5
I/O4
I/O3
I/O2
I/O1
I/O0
K
K
K
K
to K
I3
I2
I1
I0
V
I/O7
DD
Mode selection
switch
(the figure below shows an example of when
Key matrix
8 × 7 = 56 keys
µ PD6P8, 6P8A, 6P8B
I/O0
87
to