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TMS320VC549 Arkusz danych(PDF) 39 Page - Texas Instruments

Numer części TMS320VC549
Szczegółowy opis  FIXED-POINT DIGITAL SIGNAL PROCESSOR
PDF  60 Pages
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
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TMS320VC549 Arkusz danych(HTML) 39 Page - Texas Instruments

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TMS320VC549
FIXEDPOINT DIGITAL SIGNAL PROCESSOR
SPRS078F – SEPTEMBER 1998 – REVISED MAY 2000
39
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
instruction acquisition (IAQ), interrupt acknowledge (IACK), external flag (XF), and TOUT timing
switching characteristics over recommended operating conditions for IAQ and IACK
[H = 0.5 tc(CO)] (see Figure 18)
PARAMETER
’549-80
’549-100
’549-120
UNIT
PARAMETER
MIN
MAX
MIN
MAX
UNIT
td(CLKL-IAQL)
Delay time, IAQ low from CLKOUT low
– 1
5
– 1
4
ns
td(CLKL-IAQH)
Delay time, IAQ high from CLKOUT low
– 1
5
– 1
4
ns
td(A)IAQ
Delay time, address valid before IAQ low
4
4
ns
td(CLKL-IACKL)
Delay time, IACK low from CLKOUT low
0
5
0
4
ns
td(CLKL-IACKH)
Delay time , IACK high from CLKOUT low
0
5
0
4
ns
td(A)IACK
Delay time, address valid before IACK low
3
3
ns
th(A)IAQ
Hold time, address valid after IAQ high
– 3
– 3
ns
th(A)IACK
Hold time, address valid after IACK high
– 3
– 3
ns
tw(IAQL)
Pulse duration, IAQ low
2H–3
2H–3
ns
tw(IACKL)
Pulse duration, IACK low
2H–3
2H–3
ns
MSTRB
IACK
IAQ
A[15:0]
CLKOUT
td(A)IACK
td(A)IAQ
tw(IACKL)
th(A)IACK
td(CLKL-IACKL)
tw(IAQL)
th(A)IAQ
td(CLKL-IAQL)
td(CLKL-IACKH)
td(CLKL-IAQH)
Figure 18. Instruction Acquisition (IAQ) and Interrupt Acknowledge (IACK) Timing



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