ST72561J9-Auto STMicroelectronics, ST72561J9-Auto Datasheet - Page 77

• Manufacturer Part Number: ST72561J9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

ST72561-Auto
8.3
8.4
8.4.1
I/O port implementation
The hardware implementation on each I/O port depends on the settings in the DDR and OR
registers and specific feature of the I/O port such as ADC Input or true open drain.
Switching these I/O ports from one state to another should be done in a sequence that
prevents unwanted side effects. Recommended safe transitions are illustrated in
Other transitions are potentially risky and should be avoided, since they are likely to present
unwanted side-effects such as spurious interrupt generation.
Figure 33. Interrupt I/O port state transitions
I/O port register configurations
The I/O port register configurations are summarized as follows.
Standard ports
Table 28.
Floating input
Pull-up input
Open drain output
Push-pull output
Warning:
Configuration of PB7:6, PC0, PC3, PC7:5, PD3:2, PD5, PE7:0, PF7:0
The analog input voltage level must be within the limits
stated in the absolute maximum ratings.
floating/pull-up
Mode
interrupt
INPUT
Doc ID 12370 Rev 8
01
(reset state)
floating
INPUT
00
open-drain
OUTPUT
10
XX
= DDR, OR
OUTPUT
push-pull
11
DDR
0
1
Figure 33.
OR
I/O ports
0
1
0
1
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