Freescale Semiconductor DSP56374 User Manual page 240

Programming Sheets
Application:
GPIO
23 22 21 20
* * * *
0 0 0 0
Port G Control Register
Read/Write
23 22 21 20 19 18 17 16
* * * *
0 0
0 0
Port G Direction Register
Read/Write
PGn = 0 & PDGn = 0 -> Port pin PGn disconnected
PGn = 1 & PDGn = 0 -> Port pin PGn configured as input
PGn = 0 & PDGn = 1 -> Port pin PGn configured as output
PGn = 1 & PDGn = 1 -> Port pin PGn configured as open drain output
23 22 21 20
ETI1 ETO1 ERI1 ERO1 ETI0 ETO0 ERI0 ERO0
Port G GPIO Data Register
Reset = undefined
Read/Write
If port pin n is GPIO input, then PDn reflects the value on port pin n
if port pin n is GPIO output, then value written to PDn is reflected on port pin n
C-38
Port G (GPIO)
19 18 17 16 15 14 13 12 11 10 9
* * * * *
PG14 PG13
0 0 0 0
0
(PCRG) Y:$FFFFFA
Reset = $0
15 14 13 12 11 10 9
* * * * *
PDG14 PDG13
0 0 0 0 0
(PRRG) Y:$FFFFF9
Reset = $0
19 18 17 16 15 14 13 12 11 10 9
*
PD14 PD13
0
(PDRG)
Figure C-24. GPIO Port G
DSP56374 Users Guide, Rev. 1.2
8 7
PG12 PG11 PG10 PG9 PG8 PG7 PG6
*
8 7
PDG8 PDG7 PDG6 PDG5
PDG10 PDG9
PDG12 PDG11
*
8 7
PD12 PD11 PD10 PD9 PD8 PD7 PD6
Y:$FFFFF8 *
Date:
Programmer:
6 5 4 3 2 1 0
PG5 PG4 PG3 PG2
PG1 PG0
= Reserved, Program as 0
6 5 4 3 2 1 0
PDG4 PDG3 PDG2 PDG1 PDG0
= Reserved, Program as 0
6 5 4 3 2 1 0
PD5 PD4 PD3 PD2 PD1 PD0
= Reserved, Program as 0
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