ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 48

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and bypass for external clock
• Four Power Saving Modes: halt, active halt, wait and slow
• Main Clock Controller With: real time base, beep and clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

Interrupts
Caution:
48/201
Interrupt software priority registers (ISPRX)
These four registers contain the interrupt software priority of each interrupt vector.
●
●
●
Table 11.
The reset, and TRAP vectors have no software priorities. When one is serviced, the I1 and
I0 bits of the CC register are both set.
If the I1_x and I0_x bits are modified while the interrupt x is executed the following behaviour
has to be considered: If the interrupt x is still pending (new interrupt or flag not cleared) and
the new software priority is higher than the previous one, the interrupt x is re-entered.
Otherwise, the software priority stays unchanged up to the next interrupt request (after the
IRET of the interrupt x).
ISPR0
ISPR1
ISPR2
ISPR3
I1_11
I1_3
R/W
I1_7
R/W
R/W
Each interrupt vector (except reset and TRAP) has corresponding bits in the ISPRx
registers where its own software priority is stored. This correspondance is shown in
Table
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 can not be written (I1_x = 1, I0_x = 0). In this case, the previously stored value
is kept (example, previous = CFh, write = 64h, result = 44h).
R
7
7
7
7
1
11.
ISPRx interrupt vector correspondence
I0_11
I0_3
R/W
I0_7
R/W
R/W
Vector address
FFFBh-FFFAh
FFE1h-FFE0h
FFF9h-FFF8h
R
6
6
6
6
1
-
I1_10
I1_2
R/W
I1_6
R/W
R/W
R
5
5
5
5
1
I0_10
I0_2
R/W
I0_6
R/W
R/W
R
4
4
4
4
1
I1_13
I1_1
R/W
I1_5
R/W
I1_9
R/W
R/W
3
3
3
3
I1_13 and I0_13 bits
I1_0 and I0_0 bits*
I1_1 and I0_1 bits
I0_13
I0_1
R/W
I0_5
R/W
I0_9
R/W
R/W
2
2
2
2
ISPRx bits
Reset value: 1111 1111 (FFh)
Reset value: 1111 1111 (FFh)
Reset value: 1111 1111 (FFh)
Reset value: 1111 1111 (FFh)
-
I1_12
I1_0
I1_4
I1_8
R/W
R/W
R/W
R/W
ST7232Axx-Auto
1
1
1
1
I0_12
I0_0
R/W
I0_4
R/W
I0_8
R/W
R/W
0
0
0
0