memory products - Al Kossow's Bitsavers

MK4S03(N ,K)oSO/6S/8011011211S/20RESETThe MK4503 is reset (see Figure 5) whenever theReset pin (J!iS') is in the low state. During a Reset,both the internal read and write pointers are set tothe first location. Reset is required after power up,before a Write operation can begin.Although neitheLW or ii need be high when ASgoes low, both Wand R must be high tRSS beforeRS goes high, and must remain hightRSR afterwards. Refer to the foll~ng discussionfor the required state of FURY and XI during Reset.FIGURE 5. RESETw~ . 1 LI 14--1--'----1 INOTERF, EF and FF may change status during Reset,but flags will be valid at tRSC'AC ELECfRICAL CHARACfERISTICS(O"CsTAs +70"C) (Vee = +5.0 volts ± 10%)SYM PARAMETER4503·50 4603·65 4503·80tRSC Resat Cycle Time 65 80 100tRS Raset Pulse Width 50 65 80tRSH Reset Recovary Time 15 15 20tRSS Reset Set Up Time 30 45 604503·10 4503·12 4503·15 4503·20MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX UNITS NOTES120 140 175 235 ns100 120 150 200 ns 120 20 25 35 ns80 100 130 180 ns6116418