參數(shù)資料
型號: P83CL882
廠商: NXP Semiconductors N.V.
英文描述: 80C51 Ultra Low Power ULP telephony controller
中文描述: 80C51的超低功耗無鉛汽油電話控制器
文件頁數(shù): 42/88頁
文件大小: 328K
代理商: P83CL882
2001 Jun 19
42
Philips Semiconductors
Product specification
80C51 Ultra Low Power (ULP) telephony controller
P83CL882
6.6.5
C
LOCK OUTPUT MODE
In the Clock output mode, the output T2OUT is enabled as
a clock output. A timer overflow will cause T2H/T2L to be
loaded with T2RCH/T2RCL and will toggle output T2OUT.
The frequency of pin T2OUT is half the overflow
frequency.
Bit T2CON.EXF2 will be set if T2CON.EXEN2 is set and
a HIGH-to-LOW transition is detected on the T2EX pin.
Timer 2 interrupt will be set only if T2CON.EXF2 is set.
This makes an extra external interrupt available.
If Timer 2 does not operate in the Clock output mode, the
output T2OUT remains as specified by the I/O SFRs.
The Clock output mode is shown in Fig.22.
MGT297
T2L
TR2
T2H
T2RCL
T2RCH
EXF2
T2EX
toggle
Timer 2
interrupt
T2OUT
fpsc
EXEN2
T2OE
C/T2
Fig.22 Timer 2 in Clock output mode.
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