Z16M1720ASG1868 Zilog, Z16M1720ASG1868 Datasheet - Page 172

• Manufacturer Part Number: Z16M1720ASG1868
• Description: IC PCMCIA INTERFACE 100-VQFP
• Manufacturer: Zilog

Specifications of Z16M1720ASG1868

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 100-LQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UM008101-0601
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7 U G T / C P W C N
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