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MCM63P636TQ200R Datenblatt(PDF) 6 Page - Motorola, Inc |
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MCM63P636TQ200R Datenblatt(HTML) 6 Page - Motorola, Inc |
6 / 27 page MCM63P636 6 MOTOROLA FAST SRAM TRUTH TABLE (See Notes 1 and 2) K E ADS W Next Cycle (n) Input Command Code DQ (n + 1) DQ (n+2) L – H False 0 X Deselect D High–Z — L – H True 0 0 Load Address, Begin Write BW Data In — L – H True 0 1 Load Address, Begin Read BR — Data Out L – H X 1 0 Continue Write CW Data In — L – H X 1 1 Continue Read Mask Write CR MW — High–Z Data Out — NOTES: 1. X = don’t care, 1 = logic high, 0 = logic low. 2. E = true if SE1 and SE3 = 0, and SE2 = 1. BURST ADDRESS TABLE 1st Address (External) 2nd Address (Internal) 3rd Address (Internal) 4th Address (Internal) X . . . X00 X . . . X01 X . . . X10 X . . . X11 X . . . X01 X . . . X00 X . . . X11 X . . . X10 X . . . X10 X . . . X11 X . . . X00 X . . . X01 X . . . X11 X . . . X10 X . . . X01 X . . . X00 DESELECT NEW READ* Figure 1. Functional State Diagram BURST READ 1* BURST READ 2* BURST READ 3* NEW WRITE* BURST WRITE 1* BURST WRITE 2* BURST WRITE 3* MASKED WRITE 1* MASKED WRITE 2* MASKED WRITE 3* D, CW, CR – MW BR BW CR CR CR BR BW BW D, CW, MW CW CW CW BR MW MW MW MW MW BR BW D, CW, MW D, CW, MW * Command code inputs not shown from this state are not valid. |
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