參數資料
型號: TMX320VC5421
廠商: Texas Instruments, Inc.
元件分類: 數字信號處理
英文描述: DIGITAL SIGNAL PROCESSOR
中文描述: 數字信號處理器
文件頁數: 55/88頁
文件大?。?/td> 1156K
代理商: TMX320VC5421
TMS320VC5421
DIGITAL SIGNAL PROCESSOR
SPRS098 – DECEMBER 1999
55
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
external memory interface timing
switching characteristics over recommended operating conditions for a memory read
(MSTRB = 0)
(see Figure 24)
PARAMETER
MIN
MAX
UNIT
td(CLKL-A)
td(CLKH-A)
td(CLKL-MSL)
td(CLKL-MSH)
th(CLKL-A)R
th(CLKH-A)R
Address, PS, and DS timings are all included in timings referenced as address.
In the case of a memory read preceded by a memory read
§In the case of a memory read preceded by a memory write
Delay time, CLKOUT low to address valid
Delay time, CLKOUT high (transition) to address valid§
–1
4
ns
–1
4
ns
Delay time, CLKOUT low to MSTRB low
–1
4
ns
Delay time, CLKOUT low to MSTRB high
Hold time, address valid after CLKOUT low
Hold time, address valid after CLKOUT high§
– 1
4
ns
–1
ns
–1
ns
timing requirements for a memory read (MSTRB = 0) [H = 0.5 t
c(CO)
]
(see Figure 24)
MIN
MAX
UNIT
ta(A)M
ta(MSTRBL)
tsu(D)R
th(D)R
th(A-D)R
th(D)MSTRBH
Address, PS, and DS timings are all included in timings referenced as address.
Access time, read data access from address valid
2H
ns
Access time, read data access from MSTRB low
2H
ns
Setup time, read data before CLKOUT low
H
ns
Hold time, read data after CLKOUT low
0
ns
Hold time, read data after address invalid
0
ns
Hold time, read data after MSTRB high
0
ns
A
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