Int/trap control register (itc) – Zilog Z80180 User Manual
Page 82
Z8018x
Family MPU User Manual
UM005003-0703
67
vector table can be relocated on 32 byte boundaries. IL is initialized to
00H
during RESET.
INT/TRAP Control Register (ITC)
ITC is used to handle TRAP interrupts and to enable or disable the
external maskable interrupt inputs INT0, INT1 and INT2.
Interrupt Vector Low Register (IL: 33H)
Bit
7
6
5
4
3
2
1
0
Bit/Field
IL7
IL6
IL5
?
R/W
R/W
R/W
R/W
?
Reset
00H 00H 00H
?
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Bit
Position
Bit/Field
R/W
Value Description
7
–
5
IL7
–
5
R/W
The IL register is an internal I/O register which is
programmed with the OUT0 instruction and can be read
using the IN0 instruction.
4
–
0
?
N/A
Interrupt source dependent code