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5962-9317707VTC Datasheet(PDF) 6 Page - ATMEL Corporation |
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5962-9317707VTC Datasheet(HTML) 6 Page - ATMEL Corporation |
6 / 20 page 6 M67206H 4143J–AERO–04/07 Functional Description Single Device Mode A single M67206H may be used when the application requirements are for 16384 words or less. The M67206H is in a Single Device Configuration when the Expansion In (XI) control input is grounded (see Figure 2). In this mode the Half-Full Flag (HF), which is an active low output, is shared with Expansion Out (XO). Figure 2. Block Diagram of Single 16384 bits × 9 Width Expansion Mode Word width may be increased simply by connecting the corresponding input control sig- nals of multiple devices. Status flags (EF, FF and HF) can be detected from any device. Figure 3 demonstrates an 18-bit word width by using two M67206H. Any word width can be attained by adding additional M67206H. Figure 3. Block Diagram of 16384 bits x 18 FIFO Memory Used in Width Expansion Mode Note: Flag detection is accomplished by monitoring the FF, EF and the HF signals on either (any) device used in the width expansion configuration. Do not connect any output control signals together. (HALF-FULL FLAG) WRITE (W) (R) READ DATAIN 9 (I) DATAOUT 9 (Q) FULL FLAG RESET (FF) (RS) EMPTY FLAG RETRANSMIT (EF) (RT) EXPANSION IN (XI) HF M67206H HF H |
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