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BS616UV4010 데이터시트(PDF) 2 Page - Brilliance Semiconductor |
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BS616UV4010 데이터시트(HTML) 2 Page - Brilliance Semiconductor |
2 / 10 page Revision 2.4 April 2002 2 R0201-BS616UV4010 Name Function A0-A17 Address Input These 18 address inputs select one of the 262,144 x 16-bit words in the RAM. CE Chip Enable Input CE is active LOW. Chip enables must be active when data read from or write to the device. if chip enable is not active, the device is deselected and is in a standby power mode. The DQ pins will be in the high impedance state when the device is deselected. WE Write Enable Input The write enable input is active LOW and controls read and write operations. With the chip selected, when WE is HIGH and OE is LOW, output data will be present on the DQ pins; when WE is LOW, the data present on the DQ pins will be written into the selected memory location. OE Output Enable Input The output enable input is active LOW. If the output enable is active while the chip is selected and the write enable is inactive, data will be present on the DQ pins and they will be enabled. The DQ pins will be in the high impedance state when OE is inactive. LB and UB Data Byte Control Input Lower byte and upper byte data input/output control pins. DQ0 - DQ15 Data Input/Output These 16 bi-directional ports are used to read data from or write data into the RAM. Ports Vcc Power Supply Gnd Ground TRUTH TABLE PIN DESCRIPTIONS BSI BS616UV4010 MODE CE WE OE LB UB DQ0~DQ7 DQ8~DQ15 Vcc CURRENT Not selected (Power Down) H X X X X High Z High Z ICCSB, ICCSB1 Output Disabled L H H X X High Z High Z ICC L L Dout Dout ICC H L High Z Dout ICC Read L H L L H Dout High Z ICC L L Din Din ICC H L X Din ICC Write L L X L H Din X ICC |
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