參數(shù)資料
型號(hào)： Z86C84
廠商： ZiLOG, Inc.
英文描述： Z8 MCU MICROCONTROLLERS
中文描述： Z8單片機(jī)微控制器
文件頁(yè)數(shù)： 26/46頁(yè)
文件大?。?/td> 957K
代理商： Z86C84
Z86C83/C84
Z8
MCU Microcontrollers
26
DS96DZ80203
Interrupts.
The Z8 has six different interrupts from six
different sources. These interrupts are maskable,
prioritized (Figure 20) and the six sources are divided as
follows: four sources are claimed by Port 3 lines P33-P30,
and two in counter/timers (Table 10). The Interrupt Mask
Register globally or individually enables or disables the six
interrupt requests.
When more than one interrupt is pending, priorities are
resolved by a programmable priority encoder that is
controlled by the Interrupt Priority register. An interrupt
machine cycle is activated when an interrupt request is
granted. This action disables all subsequent interrupts,
saves the Program Counter and Status Flags, and then
branches to the program memory vector location reserved
for that interrupt.
Figure 20. Interrupt Block Diagram
Table 10. Interrupt Types, Sources, and Vectors
Name
IRQ0
IRQ1,
IRQ2
IRQ3
IRQ4
IRQ5
Source
/DAV0, IRQ0
IRQ1
/DAV2, IRQ2, T
IN
IRQ3
T0
T1
Vector Location
0, 1
2, 3
4, 5
6, 7
8, 9
10, 11
Comments
External (P32), Rise/ Fall Edge Triggered
External (P33), Fall Edge Triggered
External (P31), Rise /Fall Edge Triggered
By User Software
Internal
Internal
Interrupt
Edge
Select
IRQ (D6, D7)
IRQ1, 3, 4, 5
IRQ
IMR
IPR
PRIORITY
LOGIC
6
Global
Interrupt
Enable
Vector Select
Interrupt
Request
IRQ0 IRQ2
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