MC68306FC16 Datasheet, PDF (94/191 Pages) Motorola, Inc – Integrated EC000 Processor

DUIPL2–0—DUART Interrupt Priority Level
This bit selects the interrupt priority level for the serial module.
000 = Reserved
001 = Interrupt priority level 1
010 = Interrupt priority level 2
011 = Interrupt priority level 3
100 = Interrupt priority level 4
101 = Interrupt priority level 5
110 = Interrupt priority level 6
111 = Interrupt priority level 7
5.2.2 Timer Vector Register
FFFFFFFF
7
6
5
4
3
2
1
0
TVEC TVEC TVEC TVEC TVEC TVEC TVEC TVEC
7
6
5
4
3
2
1
0
RESE
T:
0
0
0
1
1
1
1
0
SUPERVISOR ONLY
TVEC7–0—Timer Vector
The value set in this field supplies the vector for the DUART timer interrupt handler.
5.2.3 Bus Timeout Period Register
FFFFFFFC
7
6
5
4
3
2
1
0
BT7
BT6
BT5
BT4
BT3
BT2
BT1
BT0
RESE
T:
U
U
U
U
U
U
U
U
SUPERVISOR ONLY
A programmable-period timer can generate a bus error to terminate any bus cycle after 16
to 4096 wait states, programmable in 16-wait state increments. The bus timeout timer is
enabled by the BTEN bit in the system register.
The bus timeout timer restarts between the read and write portions of a TAS indivisible
cycle.
BT7–0—Bus Timeout Period
The value set in this field supplies the bus timeout timer period. The bus timeout timer
period can be calculated from the equation:
Period = (16 × (register value +1)) × EXTAL
5-4
MC68306 USER'S MANUAL
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