Texas Instruments TMS570LC4357

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1209
SPNU563A–March 2018
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General-Purpose Input/Output (GIO) Module
25.6 I/O Control Summary
The behavior of the output buffer and the pull control is summarized in Table 25-22.
(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.
Table 25-22. Output Buffer and Pull Control Behavior for GIO Pins
Module under
Reset?
Pin Direction
(GIODIR)
(1)(2)
Open Drain
Enable
(GIOPDR)
(1)(3)
Pull Disable
(GIOPULDIS)
(1)(4)
Pull Select
(GIOPSL)
(1)(5)
Pull Control Output Buffer
(6)
Yes X X X X Enabled Disabled
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