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ST72321BXXX-AUTO Datasheet(PDF) 78 Page - STMicroelectronics

Part # ST72321BXXX-AUTO
Description  8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72321BXXX-AUTO Datasheet(HTML) 78 Page - STMicroelectronics

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I/O ports
ST72321Bxxx-Auto
78/247
Table 29.
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
DATA BUS
PULL-UP
INTERRUPT
DR REGISTER ACCESS
W
R
SOURCE (eix)
DR
REGISTER
CONDITION
ALTERNATE INPUT
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
ANALOG INPUT
PAD
RPU
DATA BUS
DR
DR REGISTER ACCESS
R/W
VDD
ALTERNATE
ALTERNATE
ENABLE
OUTPUT
REGISTER
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
PAD
RPU
DATA BUS
DR
DR REGISTER ACCESS
R/W
VDD
ALTERNATE
ALTERNATE
ENABLE
OUTPUT
REGISTER
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS


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