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ASM2I2313ANZ Datasheet(PDF) 3 Page - Alliance Semiconductor Corporation |
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ASM2I2313ANZ Datasheet(HTML) 3 Page - Alliance Semiconductor Corporation |
3 / 13 page June 2005 ASM2I2313ANZ rev 0.4 13 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs 3 of 13 Notice: The information in this document is subject to change without notice. Serial Configuration Map • The Serial bits will be read by the clock driver in the following order: Byte 0 - Bits 7, 6, 5, 4, 3, 2, 1, 0 Byte 1 - Bits 7, 6, 5, 4, 3, 2, 1, 0 Byte N - Bits 7, 6, 5, 4, 3, 2, 1, 0 • Reserved bits should be programmed to “0” or ”1”. • Serial interface address for the ASM2I2313ANZ is: A6 A5 A4 A3 A2 A1 A0 R/W 1 1 0 1 0 0 1 ---- Byte 0: SDRAM Active/Inactive Register (1 = Enable, 0 = Disable), Default = Enable Bit Pin # Description Bit 7 11 SDRAM5 (Active/Inactive) Bit 6 10 SDRAM4 (Active/Inactive) Bit 5 -- Reserved Bit 4 -- Reserved Bit 3 7 SDRAM3 (Active/Inactive) Bit 2 6 SDRAM2 (Active/Inactive) Bit 1 3 SDRAM1 (Active/Inactive) Bit 0 2 SDRAM0 (Active/Inactive) Byte 1: SDRAM Active/Inactive Register (1 = Enable, 0 = Disable), Default = Enable Bit Pin # Description Bit 7 27 SDRAM11 (Active/Inactive) Bit 6 26 SDRAM10 (Active/Inactive) Bit 5 23 SDRAM9 (Active/Inactive) Bit 4 22 SDRAM8 (Active/Inactive) Bit 3 -- Reserved Bit 2 -- Reserved Bit 1 19 SDRAM7 (Active/Inactive) Bit 0 18 SDRAM6 (Active/Inactive) Byte 2: SDRAM Active/Inactive Register (1 = Enable, 0 = Disable), Default = Enable Bit Pin # Description Bit 7 -- Reserved Bit 6 12 SDRAM12 (Active/Inactive) Bit 5 -- Reserved Bit 4 -- Reserved Bit 3 -- Reserved Bit 2 -- Reserved Bit 1 -- Reserved Bit 0 -- Reserved Note 1 : When the value of bit in these bytes is high, the output is enabled. When the value of the bit is low, the output is forced to low state. The default value of all the bits is high after chip is powered up. IIC Byte Flow Byte Description 1 IIC Address 2 Command (dummy value, ignored) 3 Byte Count (dummy value, ignored) 4 IIC Data Byte 0 5 IIC Data Byte 1 6 IIC Data Byte 2 |
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