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參數(shù)資料
| 型號(hào)： | ST7LITE19F1M6 |
| 英文描述： | ST7LITE1 - 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY.DATA EEPROM. ADC. 4 TIMERS. SPI |
| 中文描述： | ST7LITE1 - 8單電壓閃存EEPROM的MEMORY.DATA位MCU。 ADC的。 4定時(shí)器。的SPI |
| 文件頁數(shù)： | 32/122頁 |
| 文件大?。?/td> | 1716K |
| 代理商： | ST7LITE19F1M6 |
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ST7LITE0, ST7SUPERLITE
32/122
1
SYSTEM INTEGRITY MANAGEMENT
(Cont’d)
7.5.4 Register Description
SYSTEM INTEGRITY (SI) CONTROL/STATUS REGISTER (SICSR)
Read/Write
Reset Value: 0000 0x00 (0xh)
Bit 7:4 = Reserved, must be kept cleared.
Bit 3 =
LOCKED
PLL
Locked Flag
This bit is set and cleared by hardware. It is set au-
tomatically when the PLL reaches its operating fre-
quency.
0: PLL not locked
1: PLL locked
Bit 2 =
LVDRF
LVD reset flag
This bit indicates that the last Reset was generat-
ed by the LVD block. It is set by hardware (LVD re-
set) and cleared by software (writing zero). See
WDGRF flag description in
Section 11.1
for more
details. When the LVD is disabled by OPTION
BYTE, the LVDRF bit value is undefined.
Bit 1 =
AVDF
Voltage Detector flag
This read-only bit is set and cleared by hardware.
If the AVDIE bit is set, an interrupt request is gen-
erated when the AVDF bit changes value. Refer to
Figure 19
for additional details
0: V
DD
over AVD threshold
1: V
DD
under AVD threshold
Bit 0 =
AVDIE
Voltage Detector interrupt enable
This bit is set and cleared by software. It enables
an interrupt to be generated when the AVDF flag
changes (toggles). The pending interrupt informa-
tion is automatically cleared when software enters
the AVD interrupt routine.
0: AVD interrupt disabled
1: AVD interrupt enabled
Application notes
The LVDRF flag is not cleared when another RE-
SET type occurs (external or watchdog), the
LVDRF flag remains set to keep trace of the origi-
nal failure.
In this case, a watchdog reset can be detected by
software while an external reset can not.
Table 6. System Integrity Register Map and Reset Values
7
0
0
0
0
0
LOCK
ED
LVDRF AVDF AVDIE
Address
(Hex.)
Register
Label
7
6
5
4
3
2
1
0
003Ah
SICSR
Reset Value
0
0
0
0
LOCKED
0
LVDRF
x
AVDF
0
AVDIE
0
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