Z8038018FSG Zilog, Z8038018FSG Datasheet - Page 40

• 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

PS010002-0708
EXTERNAL INTERFACE (Continued)
Miscellaneous Timing
There are two cases where a specific transaction is not taking place on the bus which are
illustrated in this section: the bus idle cycle and the I/O heartbeat cycle.
Idle Cycles
When no transactions are being performed on the bus, an idle cycle occurs (Figure 16). All
control signals, for both memory and I/O, are inactive during the Idle cycle.
ADDRESS
BUSCLK
STATUS
/TREFR
/TREFA
/TREFC
/MSIZE
/WAIT
/MWR
DATA
/MRD
Figure 28. Idle Cycle
TiH
TiL
Z380 Microprocessor
Product Specification
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