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): 32/88頁
文件大?。?/td> 328K
代理商: P83CL882
2001 Jun 19
32
Philips Semiconductors
Product specification
80C51 Ultra Low Power (ULP) telephony controller
P83CL882
6.5
Timer 0 and Timer 1 event counters
Timer 0 and Timer 1 can perform the following functions:
Measure time intervals and pulse durations
Count events
Measure CPU speed
Generate interrupt requests.
Timer 0 and Timer 1 can be programmed independently to
operate in four modes:
Mode 0 8-bit timer or 8-bit counter each with divide-by-32
prescaler.
Mode 1 16-bit time interval or event counter.
Mode 2 8-bit time interval or event counter with automatic
reload upon overflow.
Mode 3 Timer 1 stopped and Timer 0 operates as two
separate counters.
AblockdiagramofTimer 0andTimer 1withpossibleclock
sources is shown in Fig.15.
Table 37
Timer/counter 0 and Timer/counter 1 related SFRs
SFR
DESCRIPTION
SFR ADDRESS
RESET VALUE
TCON
TMOD
SYSCON
Timer/counter 0 and Timer/counter 1 Control Register
Timer/counter 0 and 1 Mode Control Register
System Control Register
88H
89H
B4H
0000 0000
0000 0000
0000 0000
MGT292
C/T = 0
C/T = 1
TL1
TH1
TH0
C/T = 0
C/T = 1
TL0
T0
TR0
control
GATE
INT0
T1
TR1
GATE
INT1
ROMReq
fper
fpsc
InstrReq
fper
fpsc
control
Fig.15 Timer/counter 0 and 1; clock sources and control logic.
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