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ST72345C4 Folha de dados(PDF) 73 Page - STMicroelectronics

Nome de Peças ST72345C4
Descrição Electrónicos  SCI asynchronous serial interface
PDF  247 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72345C4 Folha de dados(HTML) 73 Page - STMicroelectronics

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9.7.2
AWUFH prescaler register (AWUPR)
Reset value: 1111 1111 (FFh)
Bits 7:0= AWUPR[7:0] Auto-wakeup Prescaler
These 8 bits define the AWUPR Dividing factor, as explained below:
In AWU mode, the period that the MCU stays in Halt mode (tAWU in Figure 33) is defined by
This prescaler register can be programmed to modify the time that the MCU stays in Halt
mode before waking up automatically.
7
0
AWUPR7
AWUPR6
AWUPR5
AWUPR4
AWUPR3
AWUPR2
AWUPR1
AWUPR0
Read/Write
Table 24.
AWUPR dividing factor
AWUPR[7:0]
Dividing factor
00h
Forbidden (1)
1.
If 00h is written to AWUPR, depending on the product, an interrupt is generated immediately after a HALT
instruction, or the AWUPR remains unchanged.
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
765
432
1
0
002Eh
AWUCSR
Reset value
000
00
AWUF
0
AWUM
0
AWUEN
0
002Fh
AWUPR
Reset value
AWUPR7
1
AWUPR6
1
AWUPR5
1
AWUPR4
1
AWUPR3
1
AWUPR2
1
AWUPR1
1
AWUPR0
1



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