SMJ34020A_06 Datasheet, PDF (28/97 Pages) Texas Instruments – GRAPHICS SYSTEM PROCESSOR

SMJ34020A
GRAPHICS SYSTEM PROCESSOR
SGUS011D − APRIL 1991 − REVISED SEPTEMBER 2004
cycle timing examples (continued)
During the address output to LAD by the SMJ34020A (Figure 11), the least significant four bits (LAD0−LAD3)
contain a bus-status code. PGMD low at the start of Q2 after RAS low indicates that this memory supports
page-mode operation. LRDY high at the start of Q2 after RAS low indicates that the cycle can continue without
inserting wait states.
DDOUT remains low after the initial address output on LAD (during Q4 after RAS goes low), indicating that a
memory write cycle is about to take place.
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