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參數(shù)資料
| 型號： | ST7PLITE09Y0U6TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20 |
| 封裝： | QFN-20 |
| 文件頁數(shù)： | 72/123頁 |
| 文件大?。?/td> | 2176K |
| 代理商： | ST7PLITE09Y0U6TR |
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ST7LITE0x, ST7LITESx
52/123
LITE TIMER (Cont’d)
11.1.6 Register Description
LITE TIMER CONTROL/STATUS REGISTER
(LTCSR)
Read / Write
Reset Value: 0x00 0000 (x0h)
Bit 7 = ICIE Interrupt Enable.
This bit is set and cleared by software.
0: Input Capture (IC) interrupt disabled
1: Input Capture (IC) interrupt enabled
Bit 6 = ICF Input Capture Flag.
This bit is set by hardware and cleared by software
by reading the LTICR register. Writing to this bit
does not change the bit value.
0: No input capture
1: An input capture has occurred
Note: After an MCU reset, software must initialise
the ICF bit by reading the LTICR register
Bit 5 = TB Timebase period selection.
This bit is set and cleared by software.
0: Timebase period = tOSC * 8000 (1ms @ 8 MHz)
1: Timebase period = tOSC * 16000 (2ms @ 8
MHz)
Bit 4 = TBIE Timebase Interrupt enable.
This bit is set and cleared by software.
0: Timebase (TB) interrupt disabled
1: Timebase (TB) interrupt enabled
Bit 3 = TBF Timebase Interrupt Flag.
This bit is set by hardware and cleared by software
reading the LTCSR register. Writing to this bit has
no effect.
0: No counter overflow
1: A counter overflow has occurred
Bit 2 = WDGRF Force Reset/ Reset Status Flag
This bit is used in two ways: it is set by software to
force a watchdog reset. It is set by hardware when
a watchdog reset occurs and cleared by hardware
or by software. It is cleared by hardware only when
an LVD reset occurs. It can be cleared by software
after a read access to the LTCSR register.
0: No watchdog reset occurred.
1: Force a watchdog reset (write), or, a watchdog
reset occurred (read).
Bit 1 = WDGE Watchdog Enable
This bit is set and cleared by software.
0: Watchdog disabled
1: Watchdog enabled
Bit 0 = WDGD Watchdog Reset Delay
This bit is set by software. It is cleared by hard-
ware at the end of each tWDG period.
0: Watchdog reset not delayed
1: Watchdog reset delayed
LITE
TIMER
INPUT
CAPTURE
REGISTER
(LTICR)
Read only
Reset Value: 0000 0000 (00h)
Bit 7:0 = ICR[7:0] Input Capture Value
These bits are read by software and cleared by
hardware after a reset. If the ICF bit in the LTCSR
is cleared, the value of the 8-bit up-counter will be
captured when a rising or falling edge occurs on
the LTIC pin.
Table 13. Lite Timer Register Map and Reset Values
70
ICIE
ICF
TB
TBIE
TBF
WDGR WDGE WDGD
70
ICR7
ICR6
ICR5
ICR4
ICR3
ICR2
ICR1
ICR0
Address
(Hex.)
Register
Label
76543
210
0B
LTCSR
Reset Value
ICIE
0
ICF
x
TB
0
TBIE
0
TBF
0
WDGRF
0
WDGE
0
WDGD
0
0C
LTICR
Reset Value
ICR7
0
ICR6
0
ICR5
0
ICR4
0
ICR3
0
ICR2
0
ICR1
0
ICR0
0
1
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