ST7FL15F1MAE STMICROELECTRONICS [STMicroelectronics], ST7FL15F1MAE Datasheet - Page 33

• Manufacturer Part Number: ST7FL15F1MAE
• Description: 8-bit MCU for automotive with single voltage Flash/ROM memory, data EEPROM, ADC, 5 timers, SPI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

INTERRUPTS (cont’d)
EXTERNAL INTERRUPT CONTROL REGISTER
(EICR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:6 = IS3[1:0] ei3 sensitivity
These bits define the interrupt sensitivity for ei3
(Port B0) according to
Bits 5:4 = IS2[1:0] ei2 sensitivity
These bits define the interrupt sensitivity for ei2
(Port B3) according to
Bits 3:2 = IS1[1:0] ei1 sensitivity
These bits define the interrupt sensitivity for ei1
(Port A7) according to
Bits 1:0 = IS0[1:0] ei0 sensitivity
These bits define the interrupt sensitivity for ei0
(Port A0) according to
Notes:
1. These 8 bits can be written only when the I bit in
the CC register is set.
2. Changing the sensitivity of a particular external
interrupt clears this pending interrupt. This can be
used to clear unwanted pending interrupts. Refer
to section
Table 6. Interrupt Sensitivity Bits
.
ISx1 ISx0
IS31
0
0
1
1
7
IS30
0
1
0
1
“External Interrupt Function” on page 43
Falling edge and low level
Rising edge only
Falling edge only
Rising and falling edge
IS21
External Interrupt Sensitivity
IS20
Table
Table
Table
Table
IS11
6.
6.
6.
6.
IS10
IS01
IS00
0
EXTERNAL INTERRUPT SELECTION REGIS-
TER (EISR)
Read/Write
Reset Value: 0000 1100 (0Ch)
Bits 7:6 = ei3[1:0] ei3 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei3 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
* Reset State
Bits 5:4 = ei2[1:0] ei2 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei2 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
* Reset State
Notes:
1. PB4 cannot be used as an external interrupt in HALT
mode.
ei31
7
ei31
ei21
0
0
1
0
0
1
1
ei30
ei30
ei20
ei21
0
1
0
0
1
0
1
ei20
ei11
ST7L15, ST7L19
I/O Pin
I/O Pin
ei10
PB4
PB0*
PB3*
PB1
PB2
PB5
PB6
1)
ei01
33/138
ei00
0
1