參數(shù)資料
型號(hào)： ST7FLITE09Y0M1
廠商： STMICROELECTRONICS
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16
封裝： 0.150 INCH, PLASTIC, SOP-16
文件頁(yè)數(shù)： 56/111頁(yè)
文件大小： 671K
代理商： ST7FLITE09Y0M1
ST7FLITE0
49/111
12-BIT AUTORELOAD TIMER (Cont’d)
11.2.6 Register Description
TIMER CONTROL STATUS REGISTER (ATC-
SR)
Read / Write
Reset Value: 0000 0000 (00h)
Bit 7:5 = Reserved, must be kept cleared.
Bit 3:4 = CK[1:0]
Counter Clock Selection.
These bits are set and cleared by software and
cleared by hardware after a reset. They select the
clock frequency of the counter.
Bit 2 = OVF
Overflow Flag.
This bit is set by hardware and cleared by software
by reading the ATCSR register. It indicates the
transition of the counter from FFh to ATR value.
0: No counter overflow occurred
1: Counter overflow occurred
Caution:
When set, the OVF bit stays high for 1 fCOUNTER
cycle, (up to 1ms depending on the clock selec-
tion).
Bit 1 = OVFIE
Overflow Interrupt Enable.
This bit is read/write by software and cleared by
hardware after a reset.
0: OVF interrupt disabled
1: OVF interrupt enabled
Bit 0 = CMPIE
Compare Interrupt Enable.
This bit is read/write by software and clear by
hardware after a reset. It allows to mask the inter-
rupt generation when CMPF bit is set.
0: CMPF interrupt disabled
1: CMPF interrupt enabled
COUNTER REGISTER HIGH (CNTRH)
Read only
Reset Value: 0000 0000 (00h)
COUNTER REGISTER LOW (CNTRL)
Read only
Reset Value: 0000 0000 (00h)
Bits 15:12 = Reserved, must be kept cleared.
Bits 11:0 = CNTR[11:0]
Counter Value.
This 12-bit register is read by software and cleared
by hardware after a reset. The counter is incre-
mented continuously as soon as a counter clock is
selected. To obtain the 11-bit value, software
should read the counter value in two consecutive
read operations, LSB first. When a counter over-
flow occurs, the counter restarts from the value
specified in the ATR register.
70
0
CK1
CK0
OVF
OVFIE CMPIE
Counter Clock Selection
CK1
CK0
OFF
0
fLTIMER (1 ms timebase @ 8 MHz)
0
1
fCPU
10
Reserved
1
15
8
0
CN11
CN10
CN9
CN8
70
CN7
CN6
CN5
CN4
CN3
CN2
CN1
CN0
1
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ST7FLITE09Y0U6 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, timers, SPI
ST7FLITE09Y0U6TR 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, timers, SPI
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