ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 61

• Manufacturer Part Number: ST72344S4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72344S4

• Up To 16 Kbytes Program Memory: single voltage extended Flash (XFlash) with readout and write protection, in-circuit and inapplication programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• 256 Bytes Data Eeprom With Readout Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: crystal/ceramic resonator oscillators, high-accuracy internal RC oscillator or external clock
• 5 Power-saving Modes: Slow, Wait, Halt, Auto-wakeup from Halt and Active-halt
• 16-bit Timer A With: 1 input capture, 1 output compares, external clock input, PWM and pulse generator modes
• 16-bit Timer B With: 2 input captures, 2 output compares, PWM and pulse generator modes

ST72344xx ST72345xx
8.7
External interrupt control register (EICR)
Reset value: 0000 0000 (00h)
Bits 7:6 = IS1[1:0] ei2 and ei3 sensitivity
●
Table 18.
●
Table 19.
These 2 bits can be written only when I1 and I0 of the CC register are both set to 1 (level 3).
Bit 5 = IPB Interrupt polarity for port B
IS11
IS11
IS11
0
0
1
1
0
0
1
1
The interrupt sensitivity, defined using the IS1[1:0] bits, is applied to the following
external interrupts:
ei2 (port B3..0)
ei3 (port B4)
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
7
External interrupt sensitivity (ei2)
External interrupt sensitivity (ei3)
IS10
IS10
0
1
0
1
0
1
0
1
IS10
IPB
Falling edge & low level
Doc ID 12321 Rev 5
Falling edge only
Rising edge only
IPB bit =0
IS21
Read/Write
Falling edge & low level
Rising and falling edge
Rising and falling edge
Falling edge only
Rising edge only
IS20
Sensitivity
Sensitivity
IPA
Rising edge & high level
Falling edge only
Rising edge only
IPB bit =1
0
Interrupts
0
0
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