Z16M1720ASG1868 Zilog, Z16M1720ASG1868 Datasheet - Page 75
Z16M1720ASG1868
Manufacturer Part Number
Z16M1720ASG1868
Description
IC PCMCIA INTERFACE 100-VQFP
Manufacturer
Zilog
Datasheet
1.Z0847006PSG.pdf
(330 pages)
Specifications of Z16M1720ASG1868
Applications
*
Interface
*
Voltage - Supply
*
Package / Case
100-LQFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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UM008101-0601
Address Generation
Action
DMA Simultaneous Transfer
DMA Search Only
DMA Simultaneous Transfer/Search
DMA Sequential Transfer
DMA Sequential Transfer/Search
CPU Block Transfer Instruction
Table 8. Maximum Transfer and Search Speeds (Burst and Continuous
Table 9. Reduction in Z80 CPU Throughput per Kbaud
(Byte Mode Transfers)
Two 26-bit addresses are generated by the DMA for every transfer oper-
ation: one address for the source port and another for the destination port.
The two addresses are multiplexed onto the address bus, according to
whether the DMA is reading the source or writing to the destination.
The two ports are arbitrarily named Port A and Port B. Both A and B can be
either source or destination, either memory or I/O, and have fixed or
variable addresses.
Action
DMA Sequential Transfer
DMA Sequential Transfer/Search
CPU Interrupt Driven Transfer
Modes)
Z80
(2.4 MHz)
1.25
MB/s
0.625
MB/s
0.125
MB/s
Z80
(2.4 MHz)
0.085%
0.340%
< % 2 7 2 G T K R J G T C N U
Direct Memory Access
7 U G T / C P W C N
Z80Z
(4.0 MHz)
2.0
MB/s
1.0
MB/s
0.200
MB/s
Z80Z
(4.0 MHz)
0.041%
0.213%
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