ST72361AR9-Auto STMicroelectronics, ST72361AR9-Auto Datasheet - Page 83

• Manufacturer Part Number: ST72361AR9-Auto
• Description: 8-bit MCU for automotive with K Flash, 10-bit ADC, 5 Timers, SPI, 2x LINSCI
• Manufacturer: STMicroelectronics

Specifications of ST72361AR9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

ST72361xx-Auto
Figure 36. Exact timeout duration (t
WHERE:
t
t
t
CNT = Value of T[5:0] bits in the WDGCR register (6 bits)
MSB and LSB are values from the table below depending on the timebase selected by the
TB[1:0] bits in the MCCSR register
To calculate the minimum watchdog timeout (t
IF
ELSE
To calculate the maximum Watchdog Timeout (t
IF
ELSE
Note:
Example 1:
With 2ms timeout selected in MCCSR register
min0
max0
OSC2
TB1 Bit
(MCCSR Reg.)
0
0
1
1
00
3F
Value of T[5:0] bits in WDGCR
CNT
CNT
= (LSB + 128) x 64 x t
= 16384 x t
= 125ns if f
t

<
t
max
min
MSB
-------------
MSB
-------------
register (Hex.)
4
4
=
=
t
t
In the above formulae, division results must be rounded down to the next
integer value.
min0
max0
THEN
THEN
OSC2
+
OSC2
+
16384
16384
t
TB0 Bit
(MCCSR Reg.)
0
1
0
1
t
max
min
= 8 MHz




=
=


CNT
CNT
OSC2
t
t
min0
max0
Doc ID 12468 Rev 3
–
–
4CNT
---------------- -
1.496
128
MSB
+
4CNT
---------------- -
Min. watchdog timeout (ms)
MSB
+
16384
16384




+
min
+




CNT
192
CNT
192
Selected MCCSR timebase
2ms
4ms
10ms
25ms
and t
+
+
t

min
LSB

LSB
min
t
osc2
t
osc2
max
max
 64
):



):
64
)


4CNT
---------------- -
MSB
4CNT
---------------- -
MSB
Window watchdog (WWDG)

2.048
128.552
Max. watchdog timeout (ms)

t
osc2
t
osc2
MSB
4
8
20
49
t
max
LSB
59
53
35
54
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