Z0847006PSG Zilog, Z0847006PSG Datasheet - Page 158
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
The event sequences for SIO-DMA transfers are described in Table 17 and
Table 18.
Table 17. Receive Event Sequence
Table 18. Transmit Event Sequence
Event
SIO transmits last bit of character 5-6
SIO RDY becomes true
DMA asserts BUSREQ
Current CPU machine cycle ends 1
CPU asserts BUSACK
DMA memory read cycle begins
Event
SIO receives last bit of character 10-13
SIO RDY becomes active
DMA asserts BUSREQ
Current CPU machine cycle ends 1
CPU asserts BUSACK
DMA I/O read cycle begins
DMA memory write cycle begins 2
DMA terminates BUSREQ
DMA memory write cycle ends
CPU terminates BUSACK and
regains control of bus
Note: Latency (delay from reception of final data bit to reading of received data) is 22 to
29 clock periods. The system bus is occupied by the DMA for 13 clock periods per byte
transferred.
Inter-event delay
(clock periods)
2
1-5
4
3
Inter-event delay
(clock periods)
2
1-5
4
4
1
1
1
Direct Memory Access
latency
latency
latency
latency, bus occupancy
latency, bus occupancy
latency, bus occupancy
bus occupancy
bus occupancy
bus occupancy
bus occupancy
latency
latency
latency
latency, bus occupancy
latency, bus occupancy
latency, bus occupancy
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