ST72521R9-Auto STMicroelectronics, ST72521R9-Auto Datasheet - Page 84

• Manufacturer Part Number: ST72521R9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72521R9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

Watchdog timer (WDG)
10.9
10.9.1
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Register description
Control register (WDGCR)
Table 36.
Table 37.
WDGCR
Bit
6:0
7
WDGA
Address
RW
002Ah
(Hex.)
7
WDGA
Name
T[6:0]
WDGCR register description
Watchdog timer register map and reset values
Activation bit
7-bit counter (MSB to LSB)
WDGCR
Reset Value
This bit is set by software and only cleared by hardware after a reset. When
WDGA = 1, the watchdog can generate a reset.
0: Watchdog disabled
1: Watchdog enabled
Note: This bit is not used if the hardware watchdog option is enabled by option byte.
These bits contain the value of the watchdog counter. It is decremented every 16384
f
becomes cleared).
OSC2
6
Register
label
cycles (approx.). A reset is produced when it rolls over from 40h to 3Fh (T6
5
WDGA
Doc ID 17660 Rev 1
7
0
4
T6
6
1
T5
Function
5
1
T[6:0]
RW
3
T4
4
1
2
T3
3
1
Reset value: 0111 1111 (7Fh)
T2
2
1
1
ST72521xx-Auto
T1
1
1
0
T0
0
1