ST STM8S Reference Manual

RM0016 Independent watchdog (IWDG)
Doc ID 14587 Rev 8 125/449
14.3.3 Reload register (IWDG_RLR)
Address offset: 0x02
Reset value: 0xFF
14.3.4 IWDG register map and reset values
76543210
RL[7:0]
rw
Bits 7:0
RL[7:0]: Watchdog counter reload value
These bits are write access protected (see Section 14.2). They are written by software to define the
value to be loaded in the watchdog counter each time the value 0xAA is written in the IWDG_KR
register. The watchdog counter counts down from this value. The timeout period is a function of this
value and the clock prescaler. Refer to Ta bl e 2 8.
Table 29. IWDG register map
Address
offset
Register
name
76543210
0x00
IWDG_KR
Reset value
KEY7
x
KEY6
x
KEY5
x
KEY4
x
KEY3
x
KEY2
x
KEY1
x
KEY0
x
0x01
IWDG_PR
Reset value
-
0
-
0
-
0
-
0
-
0
PR2
0
PR1
0
PR0
0
0x02
IWDG_RLR
Reset value
RL7
1
RL6
1
RL5
1
RL4
1
RL3
1
RL2
1
RL1
1
RL0
1

ST STM8S Specifications

General

Brand	ST
Model	STM8S
Category	Microcontrollers
Language	English