Z8S180 Zilog., Z8S180 Datasheet - Page 97

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

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UM005001-ZMP0400
Interrupt Source
INT1
INT2
PRT channel 0
PRT channel 1
DMA channel 0
DMA channel 1
CSI/O
ASCI channel 0
ASCI channel 1
Z 8018x Fam il y
M PU Us e r M anual
Interrupt Acknowledge Cycle Timings
individual I/O (PRT, DMAC, CSI/O, ASCI) control register. The lower
vector of INT1 INT2 and internal interrupt are summarized in Table 9.
Table 9.
Figure 43 illustrates INT1, INT2, and internal interrupts timing. INT1 and
INT2 are sampled at the falling edge of the clock state prior to T2 or T1 in
the last machine cycle. If INT1 or INT2 is asserted Low at the falling
edge of clock state prior to T3 or T1 in the last machine cycle, the
interrupt request is accepted.
Priority
H igh e s t
L ow e s t
Vector Table
IL
b7
—
—
—
—
—
—
—
—
—
b6
—
—
—
—
—
—
—
—
—
b5
—
—
—
—
—
—
—
—
—
Fixed Code
b4
0
0
0
0
0
0
0
0
1
b3
0
0
0
0
1
1
1
1
0
b2
0
0
1
1
0
0
1
1
0
b1
0
1
0
1
0
1
0
1
0
b0
0
0
0
0
0
0
0
0
0