Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 136
Z0847006PSG
Manufacturer Part Number
Z0847006PSG
Description
IC 6MHZ Z80 NMOS DART 40-DIP
Manufacturer
Zilog
Series
Z80r
Datasheet
1.Z0847006PSG.pdf
(330 pages)
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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UM008101-0601
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7 U G T / C P W C N
Review of Programming Sequences
Table 11 and Table 12 illustrate how the pipelining of data affects the
number of bytes transferred or searched in the various classes, modes, and
circumstances of operation. In most cases, the number of bytes transferred
in a transfer operation that stops at end-of-block is one more than the
programmed block length.
When the pulse-generation feature is used, the contents of the pulse control
byte in WR4 are compared with the lower byte of the byte counter after
each byte is transferred.
Port A Address Counter (RR3, RR4)
This 16-bit counter is loaded from the Port A starting address register in
WR0 by the LOAD command. It increments, decrements, or remains fixed
according to the specifications in WR1. Table 11 and Table 12 show how
this counter reads under various transfer or search conditions.
Port B Address Counter (RR5, RR6)
This counter is identical to the Port A address counter just described. If
either Port A or Port B is a fixed-address destination port, it must be
programmed as described in “Fixed-Address Destination Ports” on
page 121 to function properly.
This section describes programming the DMA in both the general and in
application-specific cases. Also, see Table 16 on page 127 for a sample
DMA Program.
DMA Initialization
Program all registers to be used in the DMA at power-up. None of these
registers contain useful defaults. This procedure includes the enabling of
Direct Memory Access
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