ST72324BK6-Auto STMicroelectronics, ST72324BK6-Auto Datasheet - Page 67

• Manufacturer Part Number: ST72324BK6-Auto
• Description: 8-bit MCU for automotive, 3.8 to 5.5V operating range with 32 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST72324BK6-Auto

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

ST72324B-Auto
Figure 32. 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: In the above formulae, division results must be rounded down to the next integer value.
EXAMPLE: With 2ms timeout selected in MCCSR register
min0
OSC2
max0
CNT
CNT
Value of T[5:0] bits in WDGCR register
= (LSB + 128) x 64 x t
= 16384 x t
= 125ns if f
(MCCSR reg.)
t
t
max
:
<

min
TB1 bit
MSB
-------------
MSB
-------------
0
0
1
1
4
4
=
=
t
t
OSC2
min0
max0
OSC2
THEN
THEN
(Hex.)
3F
00
= 8 MHz
+
+
16384
16384
OSC2
t
t
max
min


(MCCSR reg.)
=


=


CNT
CNT
Doc ID13466 Rev 4
TB0 bit
t
t
min0
max0
0
1
0
1
–
–
+
4CNT
---------------- -
+
MSB
4CNT
---------------- -
MSB
16384
min
16384
max
):
Min. Watchdog timeout (ms)
min
):





+

+
CNT

CNT
and t

192
192
Selected MCCSR timebase

+

+
t
1.496
LSB
t
osc2
t
128
LSB
max
osc2
min


)


10ms
25ms
64
2ms
4ms
64


4CNT
---------------- -
MSB
4CNT
---------------- -
MSB
Max. Watchdog timeout (ms)


t
t
osc2
osc2
On-chip peripherals
MSB
128.552
20
49
4
8
2.048
t
max
LSB
59
53
35
54
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