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25.6 I/O Control Summary
The behavior of the output buffer and the pull control is summarized in Table 25-22.
Table 25-22. Output Buffer, and Pull Control Behavior for GIO Pins
(1)
Open Drain
Module under Pin Direction Pull Disable Pull Select
Enable Pull Control Output Buffer
(6)
Reset? (GIODIR)
(2)
(GIOPULDIS)
(4)
(GIOPSL)
(5)
(GIOPDR)
(3)
Device- and
Yes X X X X Disabled
module-specific
No 0 X 0 0 Pull down Disabled
No 0 X 0 1 Pull up Disabled
No 0 X 1 0 Disabled Disabled
No 0 X 1 1 Disabled Disabled
No 1 0 X X Disabled Enabled
No 1 1 X X Disabled Enabled
(1)
X = Don't care
(2)
GIODIR = 0 for input; 1 for output
(3)
See Section 25.5.16
(4)
GIOPULDIS = 0 for enabling pull control; 1 for disabling pull control
(5)
GIOPSL= 0 for pull-down functionality; 1 for pull-up functionality
(6)
If open drain is enabled, output buffer will be disabled if a High level (1) is being output.
1142
General-Purpose Input/Output (GIO) Module SPNU562–May 2014
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