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DSP56857 bảng dữ liệu(PDF) 522 Page - Freescale Semiconductor, Inc

tên linh kiện DSP56857
Giải thích chi tiết về linh kiện  Digitial Signal Controller
PDF  662 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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DSP56857 bảng dữ liệu(HTML) 522 Page - Freescale Semiconductor, Inc

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Application:
Date:
Programmer:
Sheet
C
5685X Digital Signal Controller User Manual, Rev. 4
B-20
Freescale Semiconductor
COP Counter
Register (COPCTR)
$1FFFD0 + $2
Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Read
COUNT
Write
SERVICE
Reset
111
111111
111111
1
3 of 3
COP
COP Counter Register (COPCTR)
Bits
Name
Description
15 - 0
COPCTR
COP Counter(Count)
This is the current value of the COP counter as it counts down from the timeout value to zero. A
reset is issued when this count reaches zero.
15 - 0
COPCTR
COP Counter (Service)
When enabled, the COP requires a service sequence be performed periodically in order to clear
the COP counter and prevent a reset from being issued. This routine consists of writing $5555 to
the COPCTR followed by writing $AAAA before the timeout period expires. The writes to COPCTR
must be performed in the correct order, but any number of other instructions, and writes to other
registers, may be executed between the two writes.



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