參數(shù)資料
型號(hào): XCB56364PV100
廠商: MOTOROLA INC
元件分類: 數(shù)字信號(hào)處理
英文描述: 24-Bit Audio Digital Signal Processor
中文描述: 8-BIT, 100 MHz, OTHER DSP, PQFP112
封裝: QFP-112
文件頁數(shù): 10/162頁
文件大?。?/td> 2405K
代理商: XCB56364PV100
Signal/Connection Descriptions
External Memory Expansion Port (Port A)
1-6
DSP56364 Advance Information
MOTOROLA
1.5
EXTERNAL MEMORY EXPANSION PORT (PORT A)
When the DSP56364 enters a low-power standby mode (stop or wait), it tri-states the relevant port A
signals: D0–D7, AA0, AA1, RD, WR, CAS.
1.5.1
External Address Bus
1.5.2
External Data Bus
Table 1-5 External Address Bus Signals
Signal Name
Type
State during
Reset
Signal Description
A0–A17
Output
Keeper
active
Address Bus
—A0–A17 are active-high outputs that spec-
ify the address for external program and data memory
accesses. Otherwise, the signals are kept to their previous
values by internal weak keepers. To minimize power dissi-
pation, A0–A17 do not change state when external mem-
ory spaces are not being accessed.
Table 1-6 External Data Bus Signals
Signal Name
Type
State during
Reset
Signal Description
D0–D7
Input/
Output
Tri-stated
Data Bus
—D0–D7 are active-high, bidirectional input/out-
puts that provide the bidirectional data bus for external
program and data memory accesses. D0–D7 are tri-stated
during hardware reset and when the DSP is in the stop or
wait low-power standby mode.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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