NEC PD17062 - page 146

146
µ PD17062
The program shown below is an example of a program that meets the above condition. Do not creates
such a program.
Example
Process A
INITFLG NOT BTM0ZX, NOT BTM0CK2, NOT BTM0CK1, BTM0CK0
; Built-in macro
; Specifies the timer carry FF set pulse as 5 ms.
LOOP:
;
SKT1 BTM0CY ; Built-in macro
BR BBB
AAA:
496 steps
BR LOOP
BBB:
496 steps
BR LOOP
Because the BTM0CY flag read instruction at in this program is executed at every 500 instructions, once
the BTM0CY flag happens to be set at the timing of the instruction at , a CE reset will not occur forever.
In addition, because the instruction execution time is 12
µ s (1/83.33 kHz) during the operation of the IDC,
do not create a cyclic program that meets the following condition.
tSET × 83.33 = n (n is any integer)
x
where tSET : BTM0CY flag setting time interval
x : BTM0CY flag read instruction cycle time x number of steps