Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 148
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
Z0847006PSG
Manufacturer:
Zilog
Quantity:
22
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UM008101-0601
< % 2 7 2 G T K R J G T C N U
7 U G T / C P W C N
up. A complementary-transistor driver for Z80/Z8000 systems is depicted
in Figure 48.
Chip Selection and Enabling
Z80 peripherals are normally addressed in the 256 address I/O space.
Each peripheral Chip is enabled by an active-low Chip Enable (CE) input.
The CE input becomes active when an active IORQ signal coincides with
the peripheral’s address on the low order byte of the address bus. Small
systems may dedicate address lines to their few peripherals, making
decoder hardware unnecessary. A system using DMA, however, usually
has more peripherals, so that address decoding by means of PROM or
MSI TTL decoder is normally provided.
Figure 48.
Figure 49 illustrates three chip enable arrangements in a small system. In it,
the DMA responds to half of the 256 possible I/O addresses. In
(Figure 49b), a 256 x 4 PROM is programmed to provide a Low output on
the 01 pin only when the DMA’s address is present. The PROM must
respond quickly to meet the DMA’s CE setup time requirement.
TTL
0.01 µF
120
470
470
240
Z80/Z8000 Clock Driver
+5V
2N5771 or
2N3546
22
22
2N5772 or
2N3646
10K (max)
Clock
Direct Memory Access
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