TMS380C26 Datasheet, PDF (78/92 Pages) Texas Instruments – NETWORK COMMPROCESSOR

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
PARAMETER MEASUREMENT INFORMATION
SCS SRSX,
SRS0, SRS1
SIACK
SRNW
SUDS,
SLDS
(see Note A)
SDDIR
267
272
272a
Valid
280
(High)
268
273a
273
286
281
281a
273a
SDBEN‡
282W
283W
SDTACK†
276
HI-Z
279
275
255
HI-Z
282b
263
262
SADH0–SADH7,
SADL0–SADL7,
HI-Z
SPH, SPL
Data
(see Note 36)
HI-Z
† _{SDTACK is an active-low bus ready signal. It must be asserted before data output.}
‡ _{When the TMS380C16 begins to drive SDBEN inactive, it has already latched the write date internally. Parameter 263 must be met to the input}
of the data buffers.
NOTE A: For 68xxx mode, skew between SLDS and SUDS must not exceed 10 ns. Provided this limitation is observed, all events referenced
to a data strobe edge use the later occurring edge. Events defined by two data strobes edges, such as parameter 286, are measured
between latest and earlier edges.
Figure 38. 68xxx DIO Write Timing
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