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M5M51016RT-70LL-I Datasheet(PDF) 2 Page - Mitsubishi Electric Semiconductor |
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M5M51016RT-70LL-I Datasheet(HTML) 2 Page - Mitsubishi Electric Semiconductor |
2 / 7 page MITSUBISHI LSIs 1048576-BIT(65536-WORD BY 16-BIT)CMOS STATIC RAM MITSUBISHI ELECTRIC M5M51016BTP,RT-70L,-10L-I, -70LL,-10LL-I 9 Jul ,1997 CS BC1 BC2 W OE Mode Non selection DQ1~8 DQ9~16 Stand-by High-Z ICC L X X X X High-Z Non selection Stand-by High-Z X H H X X High-Z Upper-Byte Write Active High-Z H H L L X Din Upper-Byte Read Active High-Z H H L H L Dout Active High-Z H H L H H High-Z Active Din H L H L X High-Z Active Dout H L H H L High-Z Lower-Byte Write Lower-Byte Read Active High-Z H L H H High-Z H Active H L L X L Din Din Word Write Active H L H L L Dout Dout Word Read Active High-Z H L H H High-Z L The operation mode of the M5M51016B series are determined by a combination of the device control inputs BC1, BC 2, CS, W and OE. Each mode is summarized in the function table. A write cycle is executed whenever the low level W overlaps with the low level BC1 and/or BC2 and the high level CS. The address must be set up before the write cycle and must be stable during the entire cycle. The data is latched into a cell on the trailing edge of W, BC1, BC2 or CS, whichever occurs first, requiring the set-up and hold time relative to these edge to be maintained. The output enable input OE directly controls the output stage. Setting the OE at a high level, the output stage is in a high-impedance state, and the databus contention problem in the write cycle is eliminated. A read cycle is executed by setting W at a high level and OE at a low level while BC1 and/or BC2 and CS are in an active state. (BC1 and/or BC2=L,CS=H) When setting BC1 at a high level and the other pins are in an active state, upper-Byte are in a selectable mode in which both reading and writing are enabled, and lower-Byte are in a non-selectable mode.And when setting BC2 at a high level and the other pins are in an active state, lower-Byte are in a selectable mode and upper -Byte are in a non-selectable mode. When setting BC1 and BC2 at a high level or CS at a low level, the chips are in a non-selectable mode in which both reading and writing are disabled. In this mode, the output stage is in a high-impedance state, allowing OR-tie with other chips and memory expansion by BC1, BC2 and CS. The power supply current is reduced as low as the stand-by current which is specified as ICC3 or ICC4, and the memory data can be held at +2V power supply, enabling battery back-up operation during powerfailure or power-down operation in the non-selected mode. A1 9 A3 7 A6 4 A7 3 A12 A14 41 A1540 A13 39 A8 37 A0 10 A4 6 A2 8 A5 5 A9 36 A10 34 A11 35 11 43 42 38 13 CS BC1 BC2 W OE 15 DQ1 16 DQ2 17 DQ3 18 DQ4 19 DQ5 20 DQ6 21 DQ7 22 DQ8 24 DQ9 25 DQ10 26 DQ11 27 DQ12 28 DQ13 29 DQ14 30 DQ15 31 DQ16 CLOCK GENERATOR 65536 WORDS x16 BITS ( 1024 ROWS x 256 COLUMNS x 4 BLOCKS ) ADDRESS CHIP SELECT INPUT BYTE CONTROL INPUTS WRITE CONTROL INPUT OUTPUT ENABLE INPUT DATA INPUTS/ OUTPUTS 23 Vcc 33 GND(0V) 12 GND (0V) INPUTS BLOCK DIAGRAM 2 FUNCTION (High-Z=High-impedance) 2 |
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