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DSP56857 Datasheet(PDF) 414 Page - Freescale Semiconductor, Inc

Part # DSP56857
Description  Digitial Signal Controller
PDF  662 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

DSP56857 Datasheet(HTML) 414 Page - Freescale Semiconductor, Inc

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Register Descriptions
5685X Digital Signal Controller User Manual, Rev. 4
15-14
Freescale Semiconductor
15.8.9 Port A Data Direction Register (GPIOA_DDR)
Figure 15-18. Port A Data Direction Register (GPIOA_DDR)
See Programmer’s Sheet on Appendix page B - 113
15.8.9.1 Reserved—Bits 15–4
These bits are reserved or not implemented. They are read as 0 and cannot be modified by
writing.
15.8.9.2 Data Direction (DD)—Bits 3–0
These bits control the pins direction when in GPIO mode. These bits have no effect on the output
enables or pull-up enables in the Normal mode.
•
0 = Pin is an input; pull-ups are dependent on value of PUE registers (default)
•
1 = Pin is an output; pull-ups are disabled
15.8.10 Port B Data Direction Register (GPIOB_DDR)
Figure 15-19. Port B Direction Register (GPIOB_DDR)
See Programmer’s Sheet on Appendix page B - 114
15.8.10.1 Data Direction (DD)—Bits 15–0
These bits control the pins direction when in GPIO mode. These bits have no effect on the output
enables or pull-up enables in the Normal mode.
•
0 = Pin is an input; pull-ups are dependent on value of PUE registers (default)
•
1 = Pin is an output; pull-ups are disabled
Base + $1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Read
0
0
0
0
0
0
0
0
0
0
0
0
DD
Write
Reset
000
000
00
0
0
0
0
0
0
0
0
Base + $1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Read
DD
Write
Reset
000
000
00
0
0
0
0
0
0
0
0



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