ST7MC2S6 STMicroelectronics, ST7MC2S6 Datasheet - Page 35
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ST7MC2S6
Manufacturer Part Number
ST7MC2S6
Description
8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC,BRUSHLESS MOTOR CONTROL, 5 TIMERS, SPI, LINSCI(TM)
Manufacturer
STMicroelectronics
Datasheet
1.ST7MC1K4.pdf
(309 pages)
Specifications of ST7MC2S6
Hdflash Endurance
100 cycles, data retention
Clock Sources
crystal/ceramic resonator oscillators and by-pass for external clock, clock security system.
Four Power Saving Modes
Halt, Active-Halt, Wait and Slow
Main Clock Controller With
Real time base, Beep and Clock-out capabilities
Two 16-bit Timers With
2 input captures, 2 output compares, external clock input, PWM and pulse generator modes
8-bit Pwm Auto-reload Timer With
2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector
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SYSTEM INTEGRITY MANAGEMENT (Cont’d)
6.3.5 Register Description
SYSTEM INTEGRITY (SI) CONTROL/STATUS REGISTER (SICSR, page 0)
Read/Write
Reset Value: 000x 000x (00h)
Bit 7 = PAGE SICSR Register Page Selection
This bit selects the SICSR register page. It is set
and cleared by software
0: Access to SICSR register mapped in page 0.
1: Access to SICSR register mapped in page 1.
Bit 6 = 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
Bit 5 = AVDF Voltage Detector flag
This read-only bit is set and cleared by hardware.
If the VDIE bit is set, an interrupt request is gener-
ated when the AVDF bit changes value.
0: V
1: V
Bit 4 = 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 for more details. When
the LVD is disabled by OPTION BYTE, the LVDRF
bit value is undefined.
Bit 3 = Reserved, must be kept cleared.
Bit 2 = CSSIE Clock security syst
This bit enables the interrupt when a disturbance
PAG
E
7
DD
DD
under V
over V
AVD
IE
AVD
IT+ (AVD)
F
IT-(AVD)
LVD
RF
threshold
threshold
0
CSS
.
IE
interrupt enable
CSS
D
WDG
RF
0
is detected by the Clock Security System (CSSD
bit set). It is set and cleared by software.
0: Clock security system interrupt disabled
1: Clock security system interrupt enabled
When the PLL is disabled (PLLEN=0), the CSSIE
bit has no effect.
Bit 1 = CSSD Clock security system detection
This bit indicates a disturbance on the main clock
signal (f
cles). It is set by hardware and cleared by reading
the SICSR register when the original oscillator re-
covers.
0: Safe oscillator is not active
1: Safe oscillator has been activated
When the PLL is disabled (PLLEN=0), the CSSD
bit value is forced to 0.
Bit 0 = WDGRF Watchdog reset flag
This bit indicates that the last Reset was generat-
ed by the Watchdog peripheral. It is set by hard-
ware (watchdog reset) and cleared by software
(writing zero) or an LVD Reset (to ensure a stable
cleared state of the WDGRF flag when CPU
starts).
Combined with the LVDRF flag information, the
flag description is given by the following table.
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.
External RESET pin
OSC
RESET Sources
Watchdog
): the clock stops (at least for a few cy-
LVD
ST7MC1xx/ST7MC2xx
LVDRF
0
0
1
WDGRF
35/309
X
0
1
1
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