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MSM6586JS Datasheet(PDF) 11 Page - OKI electronic componets |
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MSM6586JS Datasheet(HTML) 11 Page - OKI electronic componets |
11 / 14 page 11/13 ¡ Semiconductor MSM6586 FUNCTIONAL DESCRIPTION Serial Address Input (SAD) Pin for inputting the read/write starting address. Designation in units of 1024 words is possible. The 512 address data can be input as 10-bit (A0-A9) serial from the SAD pin. (A0-A7 has enable address, A8 and A9 keep "L".) Serial Address Strobe (SAS) Pin for the clock used to store the serial address data into the internal register. Address Transfer Strobe (TAS) Input pin for setting the serial address data stored in the address register to the internal address counter. When the TAS falls, and the Y address is set to address 0 in the increment mode or to address 1023 in the decrement mode. Read/Write Clock (RWCK) Input pin for the data register information read/write clock. Internal operation starts at the falling edge of RWCK. The information in the data register is output to the DOUT pin in the read mode, and the information at the DIN pin is written into the data register in the write mode. The internal address counter is automatically incremented or decremented also when RWCK falls. Write Enable (WE) Input pin for selecting the read mode, write mode or read modify write mode. The read mode is set when WE is "H", and the write mode is set when WE is "L". When WE falls from "H" to "L" while RWCK is active, the read modify write mode is set. Data Input (DIN) Input pin for write data. The information at the data input pin is stored at the falling edge of RWCK in the write mode, and at the falling edge of WE in the modify write mode. Data Output (DOUT) The data output pin is always kept in the high impedance state when RWCK or CS is kept at "H". When "H" or "L" information is read in the read operation, the output pin is set to "H" or "L" and holds thereadinformationuntil RWCKisagainsetto"H".Intheearlywritemodetheoutputpinmaintains the high impedance state, so I/O common operation by connecting DIN and DOUT is possible. |
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