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DSP56857 bảng dữ liệu(PDF) 469 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) 469 Page - Freescale Semiconductor, Inc

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JTAG Port Architecture
JTAG Port, Rev. 4
Freescale Semiconductor
17-7
The 5685x includes four public instructions:
1. CLAMP
2. HIGHZ
3. IDCODE
4. TLM_SELECT
The eight bits B[7:0] of the IR, decode the nine instructions, illustrated in Figure 17-2 and its
data provided in Table 17-2. All other encodings are reserved.
Figure 17-2. JTAGIR Register
CAUTION
Reserved JTAG instruction encodings should
not be used. Hazardous operation of the chip
could occur if these instructions are used.
Table 17-2. Master TAP Instructions Opcode
Instruction
Target Register
Opcode
EXTEST
Boundary
00000000
BYPASS
Bypass
11111111
SAMPLE_PRELOAD
Boundary
00000001
IDCODE
IDCode
00000010
TLM_SEL
TLM
00000101
HIGHZ
Bypass
00000110
CLAMP
Bypass
00000111
Reserved
Reserved
00000011
Reserved
Reserved
00000100
Reserved
Reserved
00001000
IR
7
6
5
4
3
2
1
0‘
Read/Write
B7
B6
B5
B4
B3
B2
B1
B0
Reset
000
0001
0



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