UPD6133GS NEC [NEC], UPD6133GS Datasheet - Page 20

• Manufacturer Part Number: UPD6133GS
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

4.2 Timer Operation
instruction. The timer operation instructions for making the timer start operation are shown below:
0, the zero detecting circuit generates the timer operation end signal to stop the timer operation. At this time, if
the timer is in HALT mode (HALT #
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. There is the following relational expression between
the timer’s time and the down counter’s set value.
S
20
1
/LED pin and the REM pin. The REM pin can also output the carrier while the timer is in operation.
The timer starts (counting down) when a value other than 0 is set for the down counter with a timer operation
The down counter is decremented (–1) in the cycle of 8/f
Note
By setting 1 for the flag (t
Note
MOV T0, A
MOV T1, A
MOV T, #data10
MOV T, @R0
Timer time = (Set value + 1)
This becomes 16/f
The carrier output results if bit 2 of the control register 0 is cleared (to 0).
Timer operating
Timer halting
REM
LED
Figure 4-2. Timer Output (When Carrier Is Not Output)
9
X
) which enables the timer output, the timer can output its operation status from the
if bit 3 of the control register is set (to 1).
101B) waiting for the timer to stop its operation, the HALT mode is canceled
Table 4-1. Timer Output (at t
8/f
Timer value: (Set value + 1)
X
Data Sheet U10454EJ6V0DS00
(or 16/f
S
1
/LED Pin
H
L
X Note
)
X
or 16/f
X
Note
8 f/
9
. If the value of the down counter becomes
H (or carrier output
= 1)
X
(or 16/f
REM Pin
X
)
L
Note
)
PD6133, 6134