Texas Instruments TMS380C26 - Manual (Page 62)

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
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62
PARAMETER MEASUREMENT INFORMATION
(High)
Output Data Valid
Valid (see Note A) Valid
SADH0–SADH7,
SADL0–SADL7,
SPH, SPL
(see Note B)
SRDY†
SDBEN
SDDIR
SRD
SWR
SIACK
SRAS
SCS, SRSX,
SRS0–SRS2,
SBHE
261
261a
255
275
283R
272a
267
273a
266a
256
268 265
264
HI-Z
HI-Z HI-Z
HI-Z
282a
260
272a
272a 286
273a
273a
282R
279
259
† When the TMS380C26 begins to drive SDBEN inactive, it has already latched the write data internally. Parameter 263 must be met to the input
of the data buffers.
NOTES: A. In 80x8x mode, SRAS may be used to strobe the values of SBHE, SRSX, SRS0–SRS2, and SCS. When used to do so, SRAS must
meet parameter 266a, and SBHE, SRS0–SRS2, and SCS must meet parameter 264. If SRAS is strapped high, then parameters
266a and 264 are irrelevant, and parameter 268 must be met.
B. In 8-bit 80x8x mode DIO reads, the SADH0–SADH7 contain don’t care data.
Figure 28. 80x8x DIO Read Timing