dsp56362 Freescale Semiconductor, Inc, dsp56362 Datasheet - Page 70
dsp56362
Manufacturer Part Number
dsp56362
Description
Dsp56362 24-bit Audio Digital Signal Processor
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.DSP56362.pdf
(152 pages)
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External Memory Expansion Port (Port A)
3-44
Notes:
250
251
1. Bit 13 in the OMR register must be set to enter Asynchronous Arbitration mode
2. At 100 MHz it is recommended to use Asynchronous Arbitration mode.
3. If Asynchronous Arbitration mode is active, none of the timings in
4. In order to guarantee timings 250, and 251, it is recommended to assert BG inputs to different 56300 devices (on the
No.
same bus) in a non overlap manner as shown in
BB assertion window from BG input negation.
Delay from BB assertion to BG assertion
AA0–AA3
CLKOUT
RD, WR
A0–A17
BR
BG
BB
Figure 3-24 Bus Release Timings Case 2 (BRT Bit in OMR Set)
Characteristics
Table 3-19 Asynchronous Bus Arbitration timing
212
DSP56362 Technical Data, Rev. 4
Figure 3-25
213
223
Expression
2 .5* Tc + 5
.
2 * Tc + 5
Table 3-19
214
221
224
218
is required.
Min
20
—
100 MHz
Freescale Semiconductor
Max
20
—
219
AA0483
Unit
ns
ns
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