UPD6P8 NEC [NEC], UPD6P8 Datasheet - Page 26

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

26
5. TIMER
5.1 Timer Configuration
of a 9-bit down counter (t
The timer is the block used for creating a remote control transmission pattern. As shown in Figure 4-1, it consists
S
1
/LED
REM
Carrier
synchronous
circuit
8
to t
0
), a flag (t
Figure 5-1. Timer Configuration
9
) permitting the 1-bit timer output, and a zero detector.
t
9
Data Sheet U17848EJ3V0DS
Carrier signal
t
8
T1
t
7
t
6
Zero detector
9-bit down counter
t
5
T
t
4
T0
t
3
t
2
t
Timer operation end signal
(HALT # 101B release
1
signal)
PD6P8, 6P8A, 6P8B
t
0
Count
clock
f
X
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