想得到26us的红外载波周期，但输出的实际周期是24.7us，为何，高手帮忙看看：
TCCVAL EQU 220 ;256-220 = 36(52-8*2), 26us/at 4MHz/no prescale
SR_TCC:
disi
MOV stack_a,a ;Save the value of A,
SWAP stack_a
SWAPA STATUS ;Save the value of STATUS
MOV stack_s,a
;----------------------------------------------------------
mov a,@TCCVAL ;计数器初值
mov TCC,a
LedOn
LedOff
TCC_Out:
;----------------------------------------------------------
SWAPA stack_s ;Restore the saved value of STATUS
MOV STATUS,a
SWAPA stack_a ;Restore the saved value of A
clr intf
reti |
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