MC68332
REGISTER SUMMARY
USER’S MANUAL
D-15
This field selects an address space to be used by the chip-select logic.
IPL — Interrupt Priority Level
This field determines interrupt priority level when a chip select is used for interrupt ac-
knowledge. It does not affect CPU interrupt recognition.
AVEC — Autovector Enable
Do not enable autovector support when in synchronous mode.
0 = External interrupt vector enabled
1 = Autovector enabled
Option Register Function Summary
MODE
BYTE
R/W
STRB
DSACK
SPACE
IPL
AVEC
0 = ASYNC
00 = Disable 00 = Rsvd
0 = AS
0000 = 0 WAIT
00 = CPU SP
000 = All
0 = Off
1 = SYNC
01 = Lower 01 = Read 1 = DS
0001 = 1 WAIT
01 = User SP 001 = Priority 1
1 = On
10 = Upper 10 = Write
0010 = 2 WAIT
10 = Supv SP 010 = Priority 2
11 = Both
11 = Both
0011 = 3 WAIT
11 = S/U SP
011 = Priority 3
0100 = 4 WAIT
100 = Priority 4
0101 = 5 WAIT
101 = Priority 5
0110 = 6 WAIT
110 = Priority 6
0111 = 7 WAIT
111 = Priority 7
1000 = 8 WAIT
1001 = 9 WAIT
1010 = 10 WAIT
1011 = 11 WAIT
1100 = 12 WAIT
1101 = 13 WAIT
1110 = F term
1111 = External
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
.
..