Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 133
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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< % 2 7 2 G T K R J G T C N U
7 U G T / C P W C N
Read Status Byte
This command causes the next CPU read of the DMA to access the status
byte, which is the first read register.
Initiate Read Sequence
This command initializes access to a repeatable series of reads that follow
the sequence defined in the read mask.
These commands are described in the immediately preceding pages, and
Figure 46 illustrates the read mask. As mentioned in the description of
these commands, the reading of registers do not need to be contiguous in
time with these write commands or with other CPU read instructions
accessing registers in the same read sequence.
Two other commands are also related to the read registers:
Reinitialize Status Byte
This command reinitializes bits 4 and 5 of the status byte to 1s.
Read Mask Follows
This command allows the read mask to be programme. Figure 47 illustrates
more clearly the group of the seven read registers in relation to the write
registers. The read registers include:
Status Byte (RR0)
The status byte can be read independently from the other read registers and
two of its bits can be reinitialized to identify end-of-block and match bytes.
The bits in the status byte are defined as follows:
UM008101-0601
Direct Memory Access
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