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ST7LUS5 bảng dữ liệu(PDF) 55 Page - STMicroelectronics

tên linh kiện ST7LUS5
Giải thích chi tiết về linh kiện  8-bit low cost, low pin-count MCU for automotive,with single voltage Flash memory, ADC, timers
PDF  124 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST7LUS5 bảng dữ liệu(HTML) 55 Page - STMicroelectronics

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ST7LUS5, ST7LU05, ST7LU09
Power saving modes
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AWUFH prescaler register (AWUPR)
In AWU mode, the period that the MCU stays in Halt mode (tAWU in Figure 24 on page 52) is
defined by:
This prescaler register can be programmed to modify the time that the MCU stays in Halt
mode before waking up automatically.
Note:
If 00h is written to AWUPR, depending on the product, an interrupt is generated immediately
after a HALT instruction, or the AWUPR remains unchanged.
AWUPR
Reset value: 1111 1111 (FFh)
765
432
10
AWUPR[7:0]
R/W
Table 23.
AWUPR register description
Bit
Name
Function
7:0 AWUPR[7:0]
Auto Wake-up Prescaler
These 8 bits define the AWUPR division factor (as explained below).
This prescaler register can be programmed to modify the time that the MCU
stays in Halt mode before waking up automatically.
Note: If 00h is written to AWUPR, depending on the product, an interrupt is
generated immediately after a HALT instruction, or the AWUPR remains
unchanged.
Table 24.
AWUPR division factors
AWUPR[7:0]
Division factor
00h
Forbidden
01h
1
...
...
FEh
254
FFh
255
t
AWU
64
AWUPR
×
1
f
AWURC
--------------------------t
RCSTRT
+
×
=
Table 25.
AWU register map and reset values
Address (Hex.) Register label
7
6
5
4321
0
004Ah
AWUCSR
Reset value
0
0
0
0
0
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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