参数资料
型号: ST72F652AR4T1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, TQFP-64
文件页数: 145/160页
文件大小: 979K
代理商: ST72F652AR4T1
ST7265x
85/160
16-BIT TIMER (Cont’d)
CONTROL REGISTER 2 (CR2)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7 = OC1E
Output Compare 1 Pin Enable.
This bit is used only to output the signal from the
timer on the OCMP1 pin (OLV1 in Output Com-
pare mode, both OLV1 and OLV2 in PWM and
one-pulse mode). Whatever the value of the OC1E
bit, the internal Output Compare 1 function of the
timer remains active.
0: OCMP1 pin alternate function disabled (I/O pin
free for general-purpose I/O).
1: OCMP1 pin alternate function enabled.
Bit 6 = OC2E
Output Compare 2 Pin Enable.
This bit is used only to output the signal from the
timer on the OCMP2 pin (OLV2 in Output Com-
pare mode). Whatever the value of the OC2E bit,
the internal Output Compare 2 function of the timer
remains active.
0: OCMP2 pin alternate function disabled (I/O pin
free for general-purpose I/O).
1: OCMP2 pin alternate function enabled.
Bits 5:4 = Reserved, forced by hardware to 0.
Bits 3:2 = CC[1:0]
Clock Control.
The timer clock mode depends on these bits:
Table 26. Clock Control Bits
Bits 1:0 = Reserved, forced by hardware to 0.
STATUS REGISTER (SR)
Read Only
Reset Value: 0000 0000 (00h)
The three least significant bits are not used.
Bit 7 = Reserved, forced by hardware to 0.
Bit 6 = OCF1
Output Compare Flag 1.
0: No match (reset value).
1: The content of the free running counter has
matched the content of the OC1R register. To
clear this bit, first read the SR register, then read
or write the low byte of the OC1R (OC1LR) reg-
ister.
Bit 5 = TOF
Timer Overflow Flag.
0: No timer overflow (reset value).
1: The free running counter rolled over from FFFFh
to 0000h. To clear this bit, first read the SR reg-
ister, then read or write the low byte of the CR
(CLR) register.
Note: Reading or writing the ACLR register does
not clear TOF.
Bit 4 = Reserved, forced by hardware to 0.
Bit 3 = OCF2
Output Compare Flag 2.
0: No match (reset value).
1: The content of the free running counter has
matched the content of the OC2R register. To
clear this bit, first read the SR register, then read
or write the low byte of the OC2R (OC2LR) reg-
ister.
Bits 2:0 = Reserved, forced by hardware to 0.
70
OC1E OC2E
0
CC1 CC0
0
Timer Clock
CC1
CC0
fCPU /4
0
fCPU /2
0
1
fCPU /8
1
0
Reserved
1
70
0
OCF1
TOF
0
OCF2
0
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