ST72521R9-Auto STMicroelectronics, ST72521R9-Auto Datasheet - Page 78

• 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
9.4
9.5
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Table 31.
1.
Low power modes
Table 32.
Interrupts
The external interrupt event generates an interrupt if the corresponding configuration is
selected with DDR and OR registers and the interrupt mask in the CC register is not active
(RIM instruction).
Table 33.
Port G PG7:0
External interrupt on selected
external event
Port B
Port C PC7:0
Port D PD7:0
Port E
Port F
Port H PH7:0
Port
When the CANTX alternate function is selected the I/O port operates in output push-pull mode.
Mode
Wait
Halt
PB7, PB3
PB6:5, PB4, PB2:0
PE7:3, PE1:0
PE2
PF7:3
PF2
PF1:0
Interrupt event
Pin name
I/O port configuration (continued)
Effect of low power modes on I/O ports
I/O port interrupt control/wake-up capability
No effect on I/O ports. External interrupts cause the device to exit from Wait mode.
No effect on I/O ports. External interrupts cause the device to exit from Halt mode.
Doc ID 17660 Rev 1
OR = 0
floating
floating
floating
floating
floating
floating
floating
floating
floating
floating
Input (DDR = 0)
Event flag
-
floating interrupt
floating interrupt
pull-up interrupt
pull-up interrupt
OR = 1
pull-up
pull-up
pull-up
pull-up
pull-up
pull-up
Effect
pull-up input only
DDRx, ORx
control bit
Enable
open-drain
open-drain
open-drain
open-drain
open drain
open-drain
open-drain
open-drain
open drain
open drain
OR = 0
Exit from
(1)
Output (DDR = 1)
Wait
Yes
ST72521xx-Auto
push-pull
push-pull
push-pull
push-pull
push-pull
push-pull
push-pull
push-pull
push-pull
push-pull
Exit from
OR = 1
Halt
Yes