st72324bk STMicroelectronics, st72324bk Datasheet - Page 40

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

Interrupts
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Table 13.
Bit 2 = IPA Interrupt polarity for port A
Bits 1:0 = Reserved, must always be kept cleared.
Table 14.
Address
0024h
0025h
0026h
0027h
0028h
(hex.)
IS21
0
0
1
1
Bit 4:3 can be written only when I1 and I0 of the CC register are both set to 1 (level 3).
This bit is used to invert the sensitivity of the port A [3:0] external interrupts. It can be
set and cleared by software only when I1 and I0 of the CC register are both set to 1
(level 3).
0: No sensitivity inversion
1: Sensitivity inversion
ISPR0
Reset value
ISPR1
Reset value
ISPR2
Reset value
ISPR3
Reset value
EICR
Reset value
Register
Interrupt sensitivity - ei1
Nested interrupts register map and reset values
IS20
label
0
1
0
1
I1_11
IS11
I1_3
I1_7
7
1
1
1
1
0
SPI
ei1
I0_11
IS10
I0_3
I0_7
6
1
1
1
1
0
I1_10
External interrupt sensitivity
I1_2
I1_6
IPB
5
1
1
1
1
0
Falling edge & low level
Rising and falling edge
ei0
Falling edge only
Rising edge only
I0_10
IS21
I0_2
I0_6
4
1
1
1
1
0
I1_13
IS20
I1_1
I1_5
I1_9
3
1
1
1
1
0
TIMER B
MCC
ei3
I0_13
I0_1
I0_5
I0_9
IPA
2
1
1
1
1
0
ST72323 ST72323L
I1_12
I1_4
I1_8
1
1
1
1
1
0
TIMER A
ei2
I0_12
I0_4
I0_8
0
1
1
1
1
0