N2HET pin
1
0
to other N2HET pin structures
N2HET pin enable
nDIS pin*
*nDIS pin realized by GIOA[5] (N2HET1) and GIOB[2] (N2HET2)
A
B
HETPINDIS
HETDIR
HETDIN
HETDOUT
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N2HET Functional Description
985
SPNU563A–March 2018
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High-End Timer (N2HET) Module
(1)
X = Don’t care
Table 23-9. Input Buffer, Output Buffer, and Pull Control Behavior
Device
under
Reset?
Pin Direction
(DIR)
(1)
Pull Disable
(PULDIS)
(1)
Pull Select
(PULSEL)
(1)
Pull Control Output Buffer Input Buffer
Yes X X X Enabled Disabled Enabled
No 0 0 0 Pull down Disabled Enabled
No 0 0 1 Pull up Disabled Enabled
No 0 1 0 Disabled Disabled Disabled
No 0 1 1 Disabled Disabled Enabled
No 1 X X Disabled Enabled Enabled
23.2.5.15 Open-Drain Feature
The following apply if the open-drain feature is enabled on a pin, that is, the corresponding bit in the
N2HET Open Drain Register (HETPDR) is set:
• Output buffer is enabled if a low signal is being driven internally to the pin.
• The output buffer is disabled if a high signal is being driven internally to the pin.
23.2.5.16 N2HET Pin Disable Feature
This feature is provided for the safe operation of systems such as power converters and motor drives. It
can be used to inform the monitoring software of motor drive abnormalities such as over-voltage, over-
current, and excessive temperature rise.
Table 23-10 shows the conditions for the output buffer to be enabled/disabled.
Figure 23-25. N2HET Pin Disable Feature Diagram
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