EZ80190AZ050EC Zilog, EZ80190AZ050EC Datasheet - Page 124
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EZ80190AZ050EC
Manufacturer Part Number
EZ80190AZ050EC
Description
IC WEBSERVER 50MHZ XTEMP 100lQFP
Manufacturer
Zilog
Datasheet
1.EZ80190AZ050SG.pdf
(221 pages)
Specifications of EZ80190AZ050EC
Processor Type
eZ80
Features
High Speed, Single-Cycle Instruction-Fetch
Speed
50MHz
Voltage
3.3V
Mounting Type
Surface Mount
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
269-3123
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Manufacturer
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Price
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Multiply-Accumulator Basic Operation
PS006614-1208
Figure 22
when performing calculation on a set of data. The progression begins in the upper left cor-
ner with a DATA bank containing the value EMPTY. The CPU loads the MACC control
registers to define the next MACC calculation.
If the MACC is not busy with an existing calculation (EMPTY or DONE), the DATA and
CALC banks are immediately swapped to initiate the new calculation. If the MACC is
busy with an existing calculation, the DATA bank status changes to READY and waits for
the MACC to complete the existing calculation. Then, the DATA and CALC banks are
swapped to initiate the new calculation.
Assuming the DATA bank is EMPTY or READY when the MACC completes the new cal-
culation, the CALC bank is swapped with the DATA bank. The CPU can then retrieve the
result of the new calculation from the accumulator.
on page 115 displays a simplified view of the state progression of the MACC
x DATA
Figure 21. Multiply-Accumulator Block Diagram
16
Accumulator
40-Bit
40
32
y DATA
16
Product Specification
Multiply-Accumulator
eZ80190
114
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