ST72521R9-Auto STMicroelectronics, ST72521R9-Auto Datasheet - Page 76

• Manufacturer Part Number: ST72521R9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72521R9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

I/O ports
Table 30.
1. When the I/O port is in input configuration and the associated alternate function is enabled as an output, reading the DR
2. When the I/O port is in output configuration and the associated alternate function is enabled as an input, the alternate
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register will read the alternate function output status.
function reads the pin status given by the DR register content.
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
NOT IMPLEMENTED IN
TRUE OPEN DRAIN
I/O PORTS
I/O port configurations
PAD
PAD
PAD
V
V
DD
DD
R
R
V
PU
PU
DD
R
PU
Hardware configuration
Doc ID 17660 Rev 1
PULL-UP
CONDITION
INTERRUPT
CONDITION
ALTERNATE
ALTERNATE
ENABLE
ENABLE
REGISTER
DR
DR REGISTER ACCESS
EXTERNAL INTERRUPT
SOURCE (ei
REGISTER
REGISTER
DR
DR
DR REGISTER ACCESS
DR REGISTER ACCESS
W
R
ALTERNATE
ALTERNATE
x
)
OUTPUT
OUTPUT
R/W
R/W
ALTERNATE INPUT
ANALOG INPUT
ST72521xx-Auto
DATA BUS
DATA BUS
DATA BUS