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ST7FOXU0 Datasheet(PDF) 57 Page - STMicroelectronics

Part # ST7FOXU0
Description  1 additional output line
PDF  123 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7FOXU0 Datasheet(HTML) 57 Page - STMicroelectronics

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ST7FOXU0
Power saving modes
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8.5.3
AWUFH Prescaler Register (AWUPR)
Reset value: 1111 1111 (FFh)
Bits 7:0= AWUPR[7:0] Auto Wake Up Prescaler
These 8 bits define the AWUPR Dividing factor (see Table 13).
In AWU mode, the time during which the MCU stays in Halt mode, tAWU, is given by the
equation below. See also Figure 25 on page 54.
The AWUPR prescaler register can be programmed to modify the time during which the
MCU stays in Halt mode before waking up automatically.
Note:
If 00h is written to AWUPR, the AWUPR remains unchanged.
7
0
AWUPR7
AWUPR6
AWUPR5
AWUPR4
AWUPR3
AWUPR2
AWUPR1
AWUPR0
Read/Write
Table 13.
Configuring the dividing factor
AWUPR[7:0]
Dividing factor
00h
Forbidden
01h
1
...
...
FEh
254
FFh
255
t
AWU
64
AWUPR
×
1
f
AWURC
--------------------
×
t
RCSTRT
+
=
Table 14.
AWU register mapping and reset values
Address
(Hex.)
Register
label
7
6543
210
0048h
AWUCSR
Reset
Value
0
0000
AWUF
AWUM
AWUEN
0049h
AWUPR
Reset
Value
AWUPR7
1
AWUPR6
1
AWUPR5
1
AWUPR4
1
AWUPR3
1
AWUPR2
1
AWUPR1
1
AWUPR0
1



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