Z85C3008VSG Zilog, Z85C3008VSG Datasheet - Page 264
Z85C3008VSG
Manufacturer Part Number
Z85C3008VSG
Description
IC 8MHZ Z8500 CMOS SCC 44-PLCC
Manufacturer
Zilog
Series
SCCr
Specifications of Z85C3008VSG
Processor Type
Z80
Features
Error Detection and Multiprotocol Support
Speed
8MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
44-LCC (J-Lead)
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Cpu Speed
8MHz
Digital Ic Case Style
LCC
No. Of Pins
44
Supply Voltage Range
5V
Operating Temperature Range
0°C To +70°C
Svhc
No SVHC (18-Jun-2010)
Base Number
85
Rohs Compliant
Yes
Clock Frequency
8MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
269-3932
Z85C3008VSG
Z85C3008VSG
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
Z85C3008VSG
Manufacturer:
Zilog
Quantity:
800
Company:
Part Number:
Z85C3008VSG
Manufacturer:
MAX
Quantity:
74
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UM010901-0601
MODIFIED WRITE TIMING
In the SCC write cycle, the SCC assumes the data is valid
when /WR is asserted (Figure 15). This assumption is not
valid for some CPUs, e.g., the Intel 80X86. The /WR signal
from this CPU needs to delay for one more clock to initiate
the write cycle. Additional hardware is required.
ESCC
SCC
/WR
Databus latched after falling edge of WR saves external logic required
to delay WR until databus is valid. Typically needed with Intel CPUs.
SCC Spec:
WR Falling
Databus Va
Minimum
Figure 15. Modified Write Timing
29
Databus Valid
29
Boost Your System Performance Using The Zilog ESCC
In the ESCC, write cycle timing has been modified so that
data becomes valid a short time after write (approx. 20 ns).
Therefore, if the data pins from the Intel CPU are
connected directly to the ESCC, no additional logic is
required.
ESCC Spec:
Databus Valid to WR Falling
Databus Valid
Application Note
6-129
™
1
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