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ST10F296 датащи(PDF) 206 Page - STMicroelectronics

номер детали ST10F296
подробное описание детали  High performance 16-bit CPU with DSP functions
PDF  346 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F296 датащи(HTML) 206 Page - STMicroelectronics

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Obsolete
Product(s)
- Obsolete
Product(s)
Real-time clock (RTC)
ST10F296E
206/346
RTC prescaler registers (RTCPH and RTCPL)
The 20-bit programmable prescaler divider is loaded with two registers: The RTC prescaler
high (RTCPH) and RTC prescaler low (RTCPL).
The four most significant bits are stored in the RTCPH and the 16 least significant bits are
stored in the RTCPL.
To maintain the system clock, these registers are not reset. They are write protected by the
RTCOFF bit of the RTCCON register. Write operation is allowed when RTCOFF is set.
Note:
Bits 15 to 4 of the RTCPH are not used. When reading this register, the return value of these
bit is zero.
Figure 73.
Prescaler registers
The value stored in RTCPH and RTCPL is called RTCP (coded on 20-bit). The dividing ratio
of the prescaler divider is: 64 x (RTCP).
RTCPH (ED08h)
XBus
Reset value: ---Xh
15
14
13
12
11
10
987
65432
10
Reserved
RTCPH
-RW
RTCPL (ED06h)
XBus
Reset value: XXXXh
15
14
13
12
11
10
987
65432
10
RTCPL
RW
3
2
1
0
7
6
5
4
11
10
9
8
15
14
13
12
3
2
1
0
RTCPH
RTCPL
3
2
1
0
7
6
5
4
11
10
9
8
15
14
13
12
19
18
17
16
20-bit word counter
Obsolete
Product(s)
- Obsolete
Product(s)



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