參數(shù)資料
型號: TMS320LC57S
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: Digital Signal Processors(35/50ns指令周期,并行邏輯單元,可編程PLL,全雙工同步串行口的DSP)
中文描述: 數(shù)字信號處理器(35/50ns指令周期,并行邏輯單元,可編程鎖相環(huán),全雙工同步串行口的數(shù)字信號處理器)
文件頁數(shù): 60/87頁
文件大?。?/td> 1864K
代理商: TMS320LC57S
TMS320C5x, TMS320LC5x
DIGITAL SIGNAL PROCESSORS
SPRS030A – APRIL 1995 – REVISED APRIL 1996
60
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
MEMORY AND PARALLEL I/O INTERFACE WRITE
switching characteristics over recommended operating conditions [H = 0.5t
c(CO)
] (’320C5x only)
(see Figure 15)
PARAMETER
’320C5x-40
’320C5x-57
’320C5x-80
’320C5x-100
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
tsu(AV-WEL)
Setup time, address valid
before WE low
H – 5
H – 5
H – 4
H – 3
ns
tsu(WDV-WEH)
Setup time, write data
valid before WE high
2H – 20
2H§
2H – 20
2H§
2H – 14
2H§
2H – 14
2H§
ns
th(WEH-AV)
Hold time, address valid
after WE high
H – 10
H – 10
H – 7
H – 7
ns
th(WEH-WDV)
Hold time, write data valid
after WE high
Pulse duration, WE ow§
Pulse duration, WE high§
H – 5
H + 10§
H – 5
H + 10§
H – 4
H + 7§
H – 4
H + 7§
ns
tw(WEL)
tw(WEH)
2H – 2
2H + 2§
2H – 2
2H + 2§
2H – 2
2H + 2
2H – 2
2H + 2
ns
2H – 2
2H – 2
2H – 2
2H – 2
ns
td(CO-ST)
Delay time, CLKOUT1 to
STRB rising or falling
edge§
– 1
3
– 2
2
– 2
2
– 2
2
ns
td(CO-WE)
Delay time, CLKOUT1 to
WE rising or falling edge§
0
4
– 1
3
– 1
3
– 1
3
ns
td(WEH-RDL)
Delay time, WE high to
RD low
3H – 10
3H – 10
3H – 7
3H – 7
ns
ten(WEL-BUd)
Enable time, WE low to
data bus driven
– 5§
– 5§
– 4§
– 4§
ns
switching characteristics over recommended operating conditions [H = 0.5t
c(CO)
] (’320LC5x only)
(see Figure 15)
PARAMETER
’320LC5x-40
’320LC5x-50
’320LC5x-80
UNIT
MIN
MAX
MIN
MAX
tsu(AV-WEL)
tsu(WDV-WEH)
th(WEH-AV)
th(WEH-WDV)
tw(WEL)
tw(WEH)
td(WEH-RDL)
td(CO-ST)
td(CO-WE)
ten(WE-BUd)
A0–A15, PS, DS, IS, R/W, and BR timings are all included in timings referenced as address.
See Figure 16 for address bus timing variation with load capacitance.
§Values derived from characterization data and not tested
This value holds true for zero wait states or one software wait state only.
#STRB and WE edges are 0–4 ns from CLKOUT1 edges on writes. Rising and falling edges of these signals track each other; tolerance of resulting
pulsewidths is
±
2 ns, not
±
4 ns.
Setup time, address valid before WE low
Setup time, write data valid before WE high#
Hold time, address valid after WE high
H – 7
H – 4
ns
2H – 20
H – 10
2H§
2H – 14
H – 7
2H§
ns
ns
Hold time, write data valid after WE high
Pulse duration, WE low§
Pulse duration, WE high
H – 5
H + 10§
H – 4
H + 7§
ns
2H – 4
2H + 2
2H – 4
2H + 2
ns
2H – 2
2H – 2
ns
Delay time, WE high to RD low
Delay time, CLKOUT1 to STRB rising or falling edge
Delay time, CLKOUT1 to WE rising or falling edge
3H – 10
3H – 7
ns
0
4
– 2
2
ns
0
4
– 1
– 4§
3
ns
Enable time, WE to data bus driven
– 5§
ns
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