Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 95
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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Table 12. Contents of Counters After DMA Stops Due to Byte Match (Search or Transfer/
Search Operations)
UM008101-0601
Class
Notes
* Address can increment (+) or decrement (-) from the programmed starting address (As), which is the first
** Occurs only when the Ready line is still inactive just prior to the beginning of the last possible cycle in the
*** Search only has no destination. Simultaneous transfer/search cannot have both ports variable. This class of
Bus Control
address for transfer or search.
operation. For example, Ready is sampled inactive on the rising edge of CLK in the last cycle of the last read
operation.
operation is programmed as a DMA search only operation, with variable addresses assigned to the
programmed source port. What the DMA senses as the source port may be either the real source or destination,
as determined by external hardware. See the 'Applications' chapter.
:
Mode
Continuous
The DMA transfers and searches data by controlling the system buses in the
same way that the Z80 CPU controls them to perform read and write cycles.
Specifically, the DMA controls the following lines:
•
•
•
•
•
•
In addition, the DMA can also be programmed to watch a WAIT line
through its dual-purpose CE/WAIT pin.
Address Bus (16 bits)
Data Bus (8 bits)
IORQ
MREQ
RD
WR
Match Occurs
On This Byte
M
Bytes Transferred At Stop
If Transferring
M**
Byte Counter
M-1**
Source Port
Address Counter*
As±(M**
< % 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
Destination Port
Address Counter
***
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