UPD63 NEC [NEC], UPD63 Datasheet - Page 7

• Manufacturer Part Number: UPD63
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

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1.2 INPUT/OUTPUT Circuits of Pins
output
data
pull-down flag
standby
The input/output circuits of the PD63 pins are shown in partially simplified forms below.
(1) K
Note The drive capability is held low.
(2) K
(3) REM
release
data
I/O0
I0
-K
Output
latch
-K
Carrier
generator
Output
latch
I3
I/O7
Input buffer
Input buffer
V
N-ch
DD
V
N-ch
P-ch
DD
P-ch
N-ch
Note
N-ch
Internal reset signal
other than POC
standby
REM
output latch
release
(4) S
(5) S
(6) RESET
standby
release
disable
output
POC circuit
1
0
/LED
pull-down flag
pull-down flag
OFF mode
Input buffer
Input buffer
Mask option
Input buffer
PD63, 63A, 64
V
DD
V
P-ch
N-ch
DD
P-ch
N-ch
N-ch
N-ch
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