ST72321AR9-Auto STMicroelectronics, ST72321AR9-Auto Datasheet - Page 54

• Manufacturer Part Number: ST72321AR9-Auto
• Description: 8-bit MCU for automotive with 60 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR9-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

Interrupts
7.5.2
54/243
Table 17.
1. TLI, TRAP and RESET events can interrupt a level 3 program.
Interrupt software priority registers (ISPRx)
These four registers are read/write, with the exception of bits 7:4 of ISPR3, which are read
only.
These four registers contain the interrupt software priority of each interrupt vector.
●
Table 18.
1. Bits in the ISPRx registers which correspond to the TLI can be read and written but they are not significant
●
●
Level 0 (main)
Level 1
Level 2
Level 3 (= interrupt disable
ISPRx
in the interrupt process management.
Each interrupt vector (except RESET and TRAP) has corresponding bits in these
registers where its own software priority is stored. This correspondence is shown in the
following
Each I1_x and I0_x bit value in the ISPRx registers has the same meaning as the I1
and I0 bits in the CC register.
Level 0 cannot be written (I1_x = 1, I0_x = 0). In this case, the previously stored value
is kept (Example: previous = CFh, write = 64h, result = 44h).
ISPR0
ISPR1
ISPR2
ISPR3
Interrupt software priority
Interrupt software priority levels
Interrupt priority bits
Table
Vector address
FFFBh-FFFAh
FFE1h-FFE0h
FFF9h-FFF8h
I1_11
I1_3
I1_7
18.
1
7
...
(1)
)
I0_11
I0_3
I0_7
1
6
Doc ID 13829 Rev 1
I1_10
I1_2
I1_6
1
5
I0_10
I0_2
I0_6
1
4
Level
High
Low
I1_13
I1_1
I1_5
I1_9
3
I1_13 and I0_13 bits
I1_0 and I0_0 bits
I1_1 and I0_1 bits
ISPRx bits
Reset value: 1111 1111 (FFh)
I0_13
I0_1
I0_5
I0_9
2
...
I1
1
0
0
1
ST72321xx-Auto
I1_12
I1_0
I1_4
I1_8
(1)
1
I0
0
1
0
1
I0_12
I0_0
I0_4
I0_8
0