ST72254G2-Auto STMicroelectronics, ST72254G2-Auto Datasheet - Page 26

• Manufacturer Part Number: ST72254G2-Auto
• Description: 8-bit MCU for automotive with single voltage Flash/ROM memory, ADC, 16-bit timers, SPI, I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72254G2-Auto

• Clock Sources: crystal/ceramic resonator oscillators or RC oscillators, external clock, backup Clock Security System
• 3 Power Saving Modes: Halt, Wait and Slow
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and Pulse generator modes (one only on ST72104Gx-Auto and ST72216G1- Auto)

ST72104Gx-Auto, ST72215Gx-Auto, ST72216Gx-Auto, ST72254Gx-Auto
INTERRUPTS (Cont’d)
Figure 14. Interrupt Processing Flowchart
Table 5. Interrupt Mapping
Notes:
1. Configurable by option byte.
26/135
No.
10
11
12
13
0
1
2
3
4
5
6
7
8
9
FROM RESET
TIMER A
TIMER B
Source
RESET
Block
TRAP
CSS
SPI
ei0
ei1
I²C
Reset
Software Interrupt
External Interrupt Port A7..0 (C5..0
External Interrupt Port B7..0 (C5..0
Clock Security System Interrupt
SPI Peripheral Interrupts
TIMER A Peripheral Interrupts
Not used
TIMER B Peripheral Interrupts
Not used
Not used
Not used
Not used
I²C Peripheral Interrupt
Not Used
Not Used
EXECUTE INSTRUCTION
Description
RESTORE PC, X, A, CC FROM STACK
THIS CLEARS I BIT BY DEFAULT
FETCH NEXT INSTRUCTION
N
I BIT SET?
1
1
)
)
IRET?
Y
Y
Register
I2CSRx
SPISR
CRSR
Label
TASR
TBSR
N/A
N
LOAD PC FROM INTERRUPT VECTOR
Priority
Highest
Lowest
Priority
Priority
Order
N
STACK PC, X, A, CC
INTERRUPT
PENDING?
SET I BIT
HALT
from
Exit
yes
yes
no
no
no
no
Y
FFECh-FFEDh
FFFCh-FFFDh
FFEEh-FFEFh
FFEAh-FFEBh
FFFEh-FFFFh
FFFAh-FFFBh
FFE8h-FFE9h
FFE6h-FFE7h
FFE4h-FFE5h
FFE2h-FFE3h
FFE0h-FFE1h
FFF8h-FFF9h
FFF6h-FFF7h
FFF4h-FFF5h
FFF2h-FFF3h
FFF0h-FFF1h
Address
Vector