T M S3 2 0 VC5 402
F I X ED ĆPOI N T DI G I TAL S I GN AL PRO CE SSO R
SPRS079E – OCTOBER 1998 – REVISED AUGUST 2000
instruction acquisition (IAQ), interrupt acknowledge (IACK), external flag (XF), and TOUT timings
switching characteristics over recommended operating conditions for IAQ and IACK
[H = 0.5 t
] (see Figure 25)
c(CO)
PARAMETER
MIN
–1
MAX
UNIT
ns
t
Delay time, CLKOUT low to IAQ low
Delay time, CLKOUT low to IAQ high
Delay time, address valid to IAQ low
Delay time, CLKOUT low to IACK low
Delay time , CLKOUT low to IACK high
Delay time, address valid to IACK low
Hold time, IAQ high after address invalid
Hold time, IACK high after address invalid
Pulse duration, IAQ low
3
3
1
3
3
3
d(CLKL-IAQL)
t
t
–1
ns
d(CLKL-IAQH)
ns
d(A)IAQ
t
–1
–1
ns
d(CLKL-IACKL)
t
ns
d(CLKL-IACKH)
d(A)IACK
h(A)IAQ
t
t
t
t
t
ns
–2
–2
ns
ns
h(A)IACK
w(IAQL)
2H–2
2H–2
ns
Pulse duration, IACK low
ns
w(IACKL)
CLKOUT
A[19:0]
IAQ
t
t
t
d(CLKL-IAQH)
d(CLKL-IAQL)
t
h(A)IAQ
t
d(A)IAQ
t
w(IAQL)
t
d(CLKL-IACKH)
d(CLKL-IACKL)
t
h(A)IACK
t
d(A)IACK
t
w(IACKL)
IACK
MSTRB
Figure 25. IAQ and IACK Timings
52
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