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DSP56303 数据表(PDF) 161 Page - Freescale Semiconductor, Inc

部件名 DSP56303
功能描述  DSP56303 USER?셎 MANUAL
PDF  292 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

DSP56303 数据表(HTML) 161 Page - Freescale Semiconductor, Inc

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ESSI Programming Model
DSP56303 User’s Manual, Rev. 2
Freescale Semiconductor
7-29
unused. Unused bits are read as 0. Data shifts out of these registers MSB first if the SHFD bit is
cleared and LSB first if SHFD is set.
Figure 7-12. ESSI Data Path Programming Model (SHFD = 0)
SRD
ESSI Receive Data
Register
Serial
Receive
Shift
Register
24 Bit
WL1, WL0
24-bit Data
0
0
0
16-bit Data
12-bit Data
8-bit Data
LSB
LSB
LSB
LSB
MSB
Least Significant
Zero Fill
NOTES:
Data is received MSB first if SHFD = 0.
24-bit fractional format (ALC = 0).
32-bit mode is not shown.
16 Bit
12 Bit
8 Bit
(a) Receive Registers
STD
ESSI Transmit Data
Register
ESSI Transmit
Shift Register
24-bit Data
0
0
0
16-bit Data
12-bit Data
8-bit Data
LSB
LSB
LSB
LSB
Least Significant
Zero Fill
(b) Transmit Registers
Transmit High Byte
Transmit Middle Byte
Transmit Low Byte
Transmit High Byte
Transmit Middle Byte
Transmit Low Byte
23
16 15
8 7
0
23
16 15
8
70
70 7
0
70
70 7
0 7
0
MSB
MSB
MSB
NOTES:
Data is transmitted MSB first if
SHFD = 0. 4-bit fractional format (ALC = 0).
32-bit mode is not shown.
Receive High Byte
Receive Middle Byte
Receive Low Byte
Receive High Byte
Receive Middle Byte
Receive Low Byte
23
16 15
87
0
23
16 15
70
70 7
7
0
70 7
0 7
0
MSB
MSB
MSB
MSB
0
0



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