參數(shù)資料
型號(hào)： ST72331
廠商： 意法半導(dǎo)體
英文描述： 8-Bit MCU with 8 to 16K ROM/OTP/EPROM, 256 EEPROM, 384 to 512 Bytes RAM, ADC, WDG, SCI, SPI and 2 Timers(8位微控制器(8M))
中文描述： 8位微控制器與8至16K的光碟/雙層/存儲(chǔ)器，256的EEPROM，384字節(jié)RAM為512，藝發(fā)局，水分散粒劑，脊髓損傷，SPI和2計(jì)時(shí)器（8位微控制器（8米））
文件頁(yè)數(shù)： 48/98頁(yè)
文件大小： 1123K
代理商： ST72331
48/98
ST72331
16-BIT TIMER
(Cont’d)
CONTROL REGISTER 2 (CR2)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7 =
OC1E
Output Compare 1 Enable.
0: Output Compare 1 function is enabled, but the
OCMP1 pin is a general I/O.
1: Output Compare 1 function is enabled, the
OCMP1 pin is dedicated to the Output Compare
1 capability of the timer.
Bit 6 =
OC2E
Output Compare 2 Enable.
0: Output Compare 2 function is enabled, but the
OCMP2 pin is a general I/O.
1: Output Compare 2 function is enabled, the
OCMP2 pin is dedicated to the Output Compare
2 capability of the timer.
Bit 5 =
OPM
One Pulse Mode.
0: One Pulse Mode is not active.
1: One Pulse Mode is active, the ICAP1 pin can be
used to trigger one pulse on the OCMP1 pin; the
active transition is given by the IEDG1 bit. The
length of the generated pulse depends on the
contents of the OC1R register.
Bit 4 =
PWM
Pulse Width Modulation.
0: PWM mode is not active.
1: PWM mode is active, the OCMP1 pin outputs a
programmable cyclic signal; the length of the
pulse depends on the value of OC1R register;
the period depends on the value of OC2R regis-
ter.
Bit 3, 2 =
CC1-CC0
Clock Control.
The value of the timer clock depends on these bits:
Table 15. Clock Control Bits
Bit 1 =
IEDG2
Input Edge 2.
This bit determines which type of level transition
on the ICAP2 pin will trigger the capture.
0: A falling edge triggers the capture.
1: A rising edge triggers the capture.
Bit 0 =
EXEDG
External Clock Edge.
This bit determines which type of level transition
on the external clock pin EXTCLK will trigger the
free running counter.
0: A falling edge triggers the free running counter.
1: A rising edge triggers the free running counter.
7
0
OC1E OC2E OPM PWM CC1 CC0 IEDG2 EXEDG
Timer Clock
f
CPU
/ 4
f
CPU
/ 2
f
CPU
/ 8
External Clock (where
available)
CC1
0
0
1
CC0
0
1
0
1
1
110
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