ST6208C STMicroelectronics, ST6208C Datasheet - Page 42
ST6208C
Manufacturer Part Number
ST6208C
Description
8 Bit ST6 Microcontroller with 1x8-bit TIMER
Manufacturer
STMicroelectronics
Datasheet
1.ST6209C.pdf
(104 pages)
Specifications of ST6208C
Clock Sources
crystal/ceramic resonator or RC network, external clock, backup oscillator (LFAO)
2 Power Saving Modes
Wait and Stop
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ST6208C/ST6209C/ST6210C/ST6220C
8 ON-CHIP PERIPHERALS
8.1 WATCHDOG TIMER (WDG)
8.1.1 Introduction
The Watchdog timer is used to detect the occur-
rence of a software fault, usually generated by ex-
ternal interference or by unforeseen logical condi-
tions, which causes the application program to
abandon its normal sequence. The Watchdog cir-
cuit generates an MCU reset on expiry of a pro-
grammed time period, unless the program refresh-
es the counter’s contents before the SR bit be-
comes cleared.
Figure 25. Watchdog Block Diagram
42/104
1
f
int /12
bit 7
T0
WATCHDOG REGISTER (WDGR)
T1
7-BIT DOWNCOUNTER
T2
CLOCK DIVIDER
T3
÷ 256
T4
8.1.2 Main Features
■
■
■
■
Programmable timer (64 steps of 3072 clock
cycles)
Software reset
Reset (if watchdog activated) when the SR bit
reaches zero
Hardware or software watchdog activation
selectable by option bit (Refer to the option
bytes section)
T5
SR
RESET
bit 0
C
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