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ST7MC1K2 bảng dữ liệu(PDF) 89 Page - STMicroelectronics

tên linh kiện ST7MC1K2
Giải thích chi tiết về linh kiện  Clock, reset and supply management
PDF  371 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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ST7MC1K2 bảng dữ liệu(HTML) 89 Page - STMicroelectronics

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Obsolete
Product(s)
- Obsolete
Product(s)
ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto
On-chip peripherals
89/371
Figure 32.
Exact timeout duration (tmin and tmax)
WHERE:
tmin0 = (LSB + 128) x 64 x tOSC2
tmax0 = 16384 x tOSC2
tOSC2 = 125ns if fOSC2 =8 MHz
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 registe
r
To calculate the minimum watchdog timeout (tmin):
IF
THEN
ELSE
To calculate the maximum watchdog timeout (tmax):
IF
THEN
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
TB1 bit (MCCSR reg.)
TB0 bit (MCCSR reg.)
Selected MCCSR timebase
MSB
LSB
0
0
2ms
4
59
0
1
4ms
8
53
1
0
10ms
20
35
1
1
25ms
49
54
Value of T[5:0] bits in WDGCR register (Hex.)
Min. watchdog timeout (ms) tmin
Max. watchdog timeout (ms) tmax
00
1.496
2.048
3F
128
128.552
CNT
MSB
4
-------------
<
t
min
t
min0
16384
CNT
t
osc2
×
×
+
=
t
min
t
min0
16384
CNT
4CNT
MSB
-----------------
⎝⎠
⎛⎞
×
192
LSB
+
() 64
4CNT
MSB
-----------------
×
×
+
t
osc2
×
+
=
CNT
MSB
4
-------------
t
max
t
max0
16384
CNT
t
osc2
×
×
+
=
t
max
t
max0
16384
CNT
4CNT
MSB
-----------------
⎝⎠
⎛⎞
×
192
LSB
+
() 64
4CNT
MSB
-----------------
×
×
+
t
osc2
×
+
=
Obsolete
Product(s)
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Product(s)



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