ST72561J9-Auto STMicroelectronics, ST72561J9-Auto Datasheet - Page 85

• Manufacturer Part Number: ST72561J9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J9-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

ST72561-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
t
t
= 125ns if f
max
<
min
≤
MSB
-------------
MSB
-------------
register (Hex.)
4
4
=
=
t
t
min0
max0
In the above formulae, division results must be rounded down to the next
integer value.
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 12370 Rev 8
–
–
4CNT
---------------- -
1.496
128
+
MSB
4CNT
---------------- -
+
MSB
Min. watchdog timeout (ms)
16384
16384
⎞
⎠
⎞
⎠
+
+
min
×
×
(
(
192
CNT
192
CNT
Selected MCCSR timebase
2ms
4ms
10ms
25ms
and t
+
+
t
×
LSB
min
×
LSB
min
t
osc2
t
max
osc2
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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