upd6p9 Renesas Electronics Corporation., upd6p9 Datasheet - Page 17

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

4.2 Timer Operation
instruction. The timer manipulation instructions for making the timer start operation are shown below:
zero detector generates the timer operation end signal to stop the timer operation. At this time, if the timer is in
HALT mode (HALT #×101B) waiting for the timer to stop its operation, the HALT mode is released and the instruction
following the HALT instruction is executed. The output of the timer operation end signal is continued while the down
counter is 0 and the timer is stopped. The following relational expression applies between the timer’s output time
and the down counter’s set value.
The timer starts (counting down) when a value other than 0 is set for the down counter with a timer manipulation
The down counter is decremented (–1) in the cycle of 64/f
(a) µ PD6P9M1
(b) µ PD6P9M3
An example is shown below.
Example
In the case above, the timer output time is as follows.
(a) µ PD6P9M1
(b) µ PD6P9M3
Timer output time = (Set value + 1) × 64/f
Timer output time = (Set value + 0.5) × 64/f
(Set value + 1) × 64/f
= (511 + 1) × 64/4 + (50 + 1) × 64/4
= 9.008 ms
(Set value + 0.5) × 64/f
= (511 + 0.5) × 64/4 + (50 + 0.5) × 64/4
= 8.992 ms
MOV T0, A
MOV T1, A
MOV T, #data10
MOV T, @R0
When f
MOV T, #3FFH
STTS #05H
HALT #05H
MOV T, #232H
STTS #05H
HALT #05H
X
= 4 MHz
X
+ (Set value + 1) × 64/f
X
+ (Set value + 0.5) × 64/f
Data Sheet U15144EJ1V1DS
X
X
X
X
X
. If the value of the down counter becomes 0, the
µ PD6P9
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