5962-8949703MMA Ver la hoja de datos (PDF) - Austin Semiconductor

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5962-8949703MMA

256K X 4 VRAM 256K x 4 DRAM with 512K x 4 SAM

Austin Semiconductor 

Austin Semiconductor, Inc.

VRAM

SMJ44C251B

MT42C4256

NORMAL-READ TRANSFER

(refer to Figure 7)

address bits (A0– A8) are latched at the falling edge of CAS\ to

select one of the SAM’s 512 available tap points where the

serial data is read out.

A normal-read transfer can be performed in three ways:

early-load read transfer, real-time or midline-load read transfer,

and late-load read transfer. Each of these offers the flexibility of

controlling the TRG\ trailing edge in the read-transfer cycle

(see Figure 7).

FIGURE 6: NORMAL-WRITE-TRANSFER-CYCLE TIMING

FIGURE 7: NORMAL-READ-TRANSFER TIMINGS

SMJ44C251B/MT42C4256

Rev. 0.1 12/03

13

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

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