ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 51

• 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

ST7232Axx-Auto
7.8
External interrupt control register (EICR)
Table 13.
EICR
7:6
Bit
7
5
IS1[1:0]
R/W
EICR register description
Bit name
IS1[1:0]
6
IPB
R/W
IPB
Interrupt sensitivity (ei2 and ei3)
Interrupt polarity for port B
5
The interrupt sensitivity, defined using the IS1[1:0] bits, is applied to
the following external interrupts:
External interrupt ei2 (port B[3:0]):
00: External interrupt sensitivity = falling edge and low level
01: External interrupt sensitivity = rising edge only (IPB bit = 0) and
10: External interrupt sensitivity = falling edge only (IPB bit = 0) and
11: External interrupt sensitivity = rising and falling edge
External interrupt ei3 (port B[4]):
00: external interrupt sensitivity = falling edge and low level
01: external interrupt sensitivity = rising edge only
10: external interrupt sensitivity = falling edge only
11: external interrupt sensitivity = rising and falling edge
These 2 bits 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 B [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
(IPB bit = 0) and rising edge and high level (IPB bit = 1)
falling edge only (IPB bit = 1)
rising edge only (IPB bit = 1)
(IPB bit = 0 and 1)
4
IS2[1:0]
R/W
3
Function
R/W
IPA
2
Reset value: 0000 0000 (00h)
1
Reserved
-
Interrupts
0
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