參數(shù)資料
型號(hào)： UPD6134MC
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
中文描述： 4位單片機(jī)的紅外遙控傳輸
文件頁(yè)數(shù)： 20/64頁(yè)
文件大?。?/td> 410K
代理商： UPD6134MC
20
μ
PD6133, 6134
Data Sheet U10454EJ6V0DS00
4.2 Timer Operation
The timer starts (counting down) when a value other than 0 is set for the down counter with a timer operation
instruction. The timer operation instructions for making the timer start operation are shown below:
MOV T0, A
MOV T1, A
MOV T, #data10
MOV T, @R0
The down counter is decremented (–1) in the cycle of 8/f
X
or 16/f
X
Note
. If the value of the down counter becomes
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 #
×
101B) waiting for the timer to stop its operation, the HALT mode is canceled
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.
Timer time = (Set value + 1)
×
8/f
X
(or 16/f
X
Note
)
Note
This becomes 16/f
X
if bit 3 of the control register is set (to 1).
By setting 1 for the flag (t
9
) which enables the timer output, the timer can output its operation status from the
S
1
/LED pin and the REM pin. The REM pin can also output the carrier while the timer is in operation.
Table 4-1. Timer Output (at t
9
= 1)
S
1
/LED Pin
REM Pin
Timer operating
L
H (or carrier output
Note
)
Timer halting
H
L
Note
The carrier output results if bit 2 of the control register 0 is cleared (to 0).
Figure 4-2. Timer Output (When Carrier Is Not Output)
Timer value: (Set value + 1)
×
8 f/
X
(or 16/f
X
)
LED
REM
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