Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 172

• Manufacturer Part Number: Z0847006PSG
• Description: IC 6MHZ Z80 NMOS DART 40-DIP
• Manufacturer: Zilog
• Series: Z80r

Specifications of Z0847006PSG

• Processor Type: Z80
• Features: Dual Channel Asynchronous Receiver/Transmitter (DART)
• Speed: 6MHz
• Voltage: 5V
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.620", 15.75mm)
• Mounting Style: Through Hole
• Cpu Speed: 6MHz
• Digital Ic Case Style: DIP
• No. Of Pins: 40
• Supply Voltage Range: 5V
• Operating Temperature Range: 0°C To +70°C
• Svhc: No SVHC (18-Jun-2010)
• Base Number: 847006
• Rohs Compliant: Yes
• Clock Frequency: 6MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Simultaneous Transfers
The timing for simultaneous transfers and simultaneous transfer/searches is
the same. The DMA is programmed in the Search-Only mode, and both
read and write cycles occur simultaneously in the time that a source-port
read would occur in search-only. Only one address is generated on the
address bus; the I/O port is hardwire-selected during this operation as
shown in the Applications chapter. The IORQ, MREQ, RD, and WR lines
are gated into two new signals by external logic. These signals are either:
MEMWR (Memory write)
IORD (I/O read)
or:
MEMRD (Memory read)
IOWR (I/O write)
Direct Memory Access