參數(shù)資料
型號(hào): Z8S180
廠商: ZiLOG, Inc.
英文描述: CAP 0.1UF 100V +80-20% Z5U AXIAL TR-14
中文描述: 強(qiáng)化Z180微處理器
文件頁(yè)數(shù): 19/70頁(yè)
文件大小: 387K
代理商: Z8S180
Z80180/Z8S180/Z8L180
Enhanced Z180 Microprocessor
Zilog
DS971800401
P R E L I M I N A R Y
1-19
1
Figure 15 shows the timing for exiting IDLE mode due to
an
interrupt
request.
Note
that
the
Z80180/Z8S180/Z8L180 takes about 9.5 clocks to restart.
While the Z80180/Z8S180/Z8L180 is in IDLE mode, it will
grant the bus to an external master if the BREXT bit
(CCR5) is 1. Figure 16 shows the timing for this sequence.
Note that the part takes 8 clock cycles longer to respond to
the Bus Request than in normal operation.
After the external master negates the Bus Request, the
Z80180/Z8S180/Z8L180 disables the PHI clock and re-
mains in IDLE mode.
Figure 15. Z80180/Z8S180/Z8L180 IDLE Mode Exit due to External Interrupt
φ
T
1
T
2
T
4
NMI
or
A
19
-A
0
HALT
M1
Opcode Fetch or Interrupt
Acknowledge Cycle
FFFFFH
IDLE Mode
T
3
9.5 Cycle Delay from INTi Asserted
INTi
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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