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ST7LITEUS2 Datasheet(PDF) 62 Page - STMicroelectronics

Part # ST7LITEUS2
Description  Interrupt management
PDF  136 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITEUS2 Datasheet(HTML) 62 Page - STMicroelectronics

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I/O ports
ST7LITEUS2, ST7LITEUS5
62/136
Table 18.
I/O port mode options(1)
1.
NI stands for not implemented; Off for implemented not activated; On for implemented and activated.
Configuration mode
Pull-up
P-buffer
Diodes
to VDD
to VSS
Input
Floating with/without Interrupt
Off
Off
On
On
Pull-up with/without Interrupt
On
Output
Push-pull
Off
On
Open Drain (logic level)
Off
Table 19.
I/O port configurations
Hardware configuration
1.
When the I/O port is in input configuration and the associated alternate function is enabled as an output,
reading the DR register will read the alternate function output status.
2.
When the I/O port is in output configuration and the associated alternate function is enabled as an input,
the alternate function reads the pin status given by the DR register content.
CONDITION
PAD
VDD
RPU
EXTERNAL INTERRUPT
POLARITY
DATA BUS
PULL-UP
INTERRUPT
DR REGISTER ACCESS
W
R
FROM
OTHER
PINS
SOURCE (eix)
SELECTION
DR
REGISTER
CONDITION
ALTERNATE INPUT
ANALOG INPUT
PAD
RPU
DATA BUS
DR
DR REGISTER ACCESS
R/W
VDD
ALTERNATE
ALTERNATE
ENABLE
OUTPUT
REGISTER
PAD
RPU
DATA BUS
DR
DR REGISTER ACCESS
R/W
VDD
ALTERNATE
ALTERNATE
ENABLE
OUTPUT
REGISTER
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