upd6p9 Renesas Electronics Corporation., upd6p9 Datasheet - Page 16

• Manufacturer Part Number: upd6p9
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

16
4. TIMER
4.1 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
8
Carrier
synchronous
circuit
to t
0
), a flag (t
Figure 4-1. Timer Configuration
9
) permitting the 1-bit timer output, and a zero detector.
t
Data Sheet U15144EJ1V1DS
9
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)
t
0
Count
clock
f
X
/64
µ PD6P9