參數資料
型號: ADSP-2189NKSTZ-320
廠商: ANALOG DEVICES INC
元件分類: 數字信號處理
英文描述: 16-Bit, 80MIPS, 1.8V, 2 Serial Ports, Host Port, 192KB RAM; Package: 100 ld LQFP; No of Pins: 100; Temperature Range: Comm.
中文描述: 24-BIT, 40 MHz, OTHER DSP, PQFP100
封裝: LEAD FREE, MS-026BED, LQFP-100
文件頁數: 25/48頁
文件大?。?/td> 2334K
代理商: ADSP-2189NKSTZ-320
ADSP-218xN
Rev. A
|
Page 31 of 48
|
August 2006
Memory Read
Table 18. Memory Read
Parameter
Min
Max
Unit
Timing Requirements:
tRDD
RD Low to Data Valid1
0.5tCK – 5 + w
ns
tAA
A13 – 0, xMS to Data Valid2
0.75tCK – 6 + w
ns
tRDH
Data Hold from RD High
0
ns
Switching Characteristics:
tRP
RD Pulse Width
0.5tCK – 3 + w
ns
tCRD
CLKOUT High to RD Low
0.25tCK – 2
0.25tCK + 4
ns
tASR
A13 – 0, xMS Setup before RD Low
0.25tCK – 3
ns
tRDA
A13 – 0, xMS Hold after RD Deasserted
0.25tCK – 3
ns
tRWR
RD High to RD or WR Low
0.5tCK – 3
ns
1 w = wait states 3 t
CK.
2 xMS = PMS, DMS, CMS, IOMS, BMS.
Figure 29. Memory Read
CLKOUT
ADDRESS LINES1
DATA LINES2
tRDA
tRWR
tRP
tASR
tCRD
tRDD
tAA
tRDH
DMS, PMS,
BMS, IOMS,
CMS
RD
WR
1ADDRESS LINES FOR ACCESSES ARE:
2DATA LINES FOR ACCESSES ARE:
BDMA: A13–0 (14 LSBs), D23–16 (8 MSBs)
BDMA: D15–8
I/O SPACE: A10–0
I/O SPACE: D23–8
EXTERNAL PM AND DM: A13–0
EXTERNAL DM: D23–8
EXTERNAL PM: D23–0
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