ST7LITE2
INTERRUPTS (Cont’d)
Bit 3:2 = ei1[1:0] ei1 pin selection
These bits are written by software. They select the
Port A I/O pin used for the ei1 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
ei11
ei10
0
0
0
1
1
0
1
1
I/O Pin
PA4
PA5
PA6
PA7*
* Reset State
Bits 1:0 = ei0[1:0] ei0 pin selection
These bits are written by software. They select the
Port A I/O pin used for the ei0 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
ei01
ei00
0
0
0
1
1
0
1
1
I/O Pin
PA0 *
PA1
PA2
PA3
* Reset State
Bits 1:0 = Reserved.
37/133
1