Z8038018FSG Zilog, Z8038018FSG Datasheet - Page 110
Z8038018FSG
Manufacturer Part Number
Z8038018FSG
Description
IC 16 BIT Z80 MPU 100-QFP
Manufacturer
Zilog
Specifications of Z8038018FSG
Processor Type
Z380
Features
16-Bit, High-Performance Enhanced Z80 CPU
Speed
18MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
100-QFP
Processor Series
Z80380x
Core
Z380
Program Memory Size
64 KB
Maximum Clock Frequency
18 MHz
Operating Supply Voltage
0 V to 5 V
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Standby Mode Exit With External Interrupts
Standby mode can be exited by asserting input /NMI.
Asserting the maskable interrupt inputs /INT3-/INT0 may
also exit standby mode, if the global interrupt flag IEF1 was
previously enabled at logic 1, and for those requests
individually enabled, as indicated in the Interrupt Enable
Register.
When exit conditions are met, /STNBY goes to logic 1,
allowing the external crystal oscillator that drives the Z380
MPU’s CLK input to restart.
/INT3,2,1,0
ADDRESS
BUSCLK
/STNBY
IOCLK
/NMI
FFFFFFFFH
Figure 55. Standby Mode Exit with External Interrupts Timing
The Z380 MPU’s internal warm-up counter proceeds to
count, for a duration long enough for the oscillator to
stabilize, as selected by the WM bits in the Standby Mode
Control Register. When the counter reaches its end-count,
clocking resumes within the Z380 MPU, as well as at the
BUSCLK and IOCLK outputs. The Z380 MPU performs an
interrupt acknowledge procedure appropriate to the inter-
rupt request that initiated the standby mode exit.
Acknowledge
Appropriate
Page 110 of 125
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