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TI380C25 Datasheet, PDF (45/71 Pages) Texas Instruments – TOKEN-RING COMMPROCESSOR | |||
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SCS, SRSX,
SRS0 â SRS2,
SBHE
Only SCS needs to be inactive.
All others are donât care.
TI380C25
TOKEN-RING COMMPROCESSOR
SPWS012 â JANUARY 1995
SIACK
SWR
272a
272a
273a
273a
SRD
SDDIR
High
SDBEN
272a
282R
283R
273a
279
276
275
SRDY â
Hi-Z
282a
255
Hi-Z
259
260
261
261a
SADH0 â SADH7,
SADL0 â SADL7,
Hi-Z
SPH, SPL â¡
Output Data Valid
Hi-Z
â SRDY is an active-low bus ready signal. It must be asserted before data output.
â¡ In 8-bit 80x8x mode DIO writes, the value placed on SADH0 â SADH7 is a donât care.
Figure 17. 80x8x Interrupt-Acknowledge-Cycle Timing: Second SIACK Pulse
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45
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