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HN58X24256TI Datasheet(PDF) 8 Page - Hitachi Semiconductor |
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HN58X24256TI Datasheet(HTML) 8 Page - Hitachi Semiconductor |
8 / 22 page HN58X24128I/HN58X24256I 8 Device Address (A0, A1, A2) Eight devices can be wired for one common data bus line as maximum. Device address pins are used to distinguish each device and device address pins should be connected to V CC or VSS. When device address code provided from SDA pin matches corresponding hard-wired device address pins A0 to A2, that one device can be activated. Pin Connections for A0 to A2 Pin connection Memory size Max connect number A2 A1 A0 Note 128k bit 8 V CC/VSS* 1 V CC/VSS V CC/VSS 256k bit 8 V CC/VSS V CC/VSS V CC/VSS Note: 1. “V CC/VSS” means that device address pin should be connected to VCC or VSS. Write Protect (WP) When the Write Protect pin (WP) is high, the write protection feature is enabled and operates as shown in the following table. When the WP is low, write operation for all memory arrays are allowed. The read operation is always activated irrespective of the WP pin status. WP should be fixed high or low during operations since WP does not provide a latch function. Write Protect Area Write protect area WP pin status 128k bit 256k bit V IH Upper 1/8 (16k bit) Upper 1/8 (32k bit) V IL Normal read/write operation |
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