Texas Instruments TMS380C26 - Manual (Page 72)

TMS380C26 NETWORK COMMPROCESSOR
SPWS010A–APRIL
1992–REVISED MARCH 1993
72
POST
OFFICE BOX 1443 HOUST
ON,
TEXAS
77001
•
PARAMETER MEASUREMENT INFORMATION
218
SDDIR
SDBEN
SRDY
SADL0–SADH7,
SADH0–SADL7,
SPH, SPL
(see Note B)
SALE
SXAL
SWR
SRD
SBHE
(see Note A)
SBCLK
TWAIT
V
T1 T4 T3 T2 T1 TX T4
208b
208a
216a
225WH
223W
219
212
212
233
216
215
232
216
215
217
217
212
Output Data Address
Valid
(HIGH)
(HIGH)
225W 237W
221
Extended Address
227W
218
233
NOTES: A. In 8-bit 80x8x mode, SBHE/SRNW is a don’t care input during DIO and an inactive (high) output during DMA.
B. In 8-bit 80x8x mode, the most significant byte of the address is maintained on SADH for T2, T3, and T4. The address is maintained according to parameter 21; i.e., held
after T4 high.
Figure 34. 80x8x Mode DMA Write Timing