ST72345C4 STMicroelectronics, ST72345C4 Datasheet - Page 62

• Manufacturer Part Number: ST72345C4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72345C4

• 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

Interrupts
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Bits 4:3 = IS2[1:0] ei0 and ei1 sensitivity
●
Table 20.
●
Table 21.
These 2 bits can be written only when I1 and I0 of the CC register are both set to 1 (level 3).
Bit 2 = IPA Interrupt polarity for ports A3 and E1
Bits 1:0 = Reserved, must always be kept cleared.
IS21
IS21
0
0
1
1
0
0
1
1
The interrupt sensitivity, defined using the IS2[1:0] bits, is applied to the following
external interrupts:
ei0 (port A3, port E1)
ei1 (port F2..0)
This bit is used to invert the sensitivity of the port A3 and E1 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
External interrupt sensitivity (ei0)
External interrupt sensitivity (ei1)
IS20
IS20
0
1
0
1
0
1
0
1
Falling edge & low level
Falling edge only
Rising edge only
Doc ID 12321 Rev 5
IPA bit =0
Falling edge & low level
Rising and falling edge
Rising and falling edge
Falling edge only
Rising edge only
Sensitivity
Sensitivity
Rising edge & high level
Falling edge only
Rising edge only
ST72344xx ST72345xx
IPA bit =1