TI380C25 Datasheet, PDF (47/71 Pages) Texas Instruments – TOKEN-RING COMMPROCESSOR

SIF Inputs:
SBCLK
SBBSY,
SHLDA
SIF Outputs:
SHRQ
User Master
( T4)
230
SRD, SWR
SBHE
SADH0 – SADH7,
SADL0 – SADL7,
SPH, SPL
SDDIR
SOWN ^†
Bus Exchange
I1
I2
SIF Master
TX
208a
208b
241
241a
224c
224a
212
Address
Write
Read
† _{While the system interface DMA controls are active (i.e., SOWN is asserted), SCS is disabled.}
Figure 18. 80x8x-Mode Bus-Arbitration Timing, SIF Takes Control
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