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S29GL01GP датащи(PDF) 23 Page - SPANSION |
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S29GL01GP датащи(HTML) 23 Page - SPANSION |
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23 / 81 page ![]() October 22, 2012 S29GL-P_00_A14 S29GL-P MirrorBit® Flash Family 23 Data She e t Software Functions and Sample Code Note 1. Any offset within the device works. 2. base = base address. The following is a C source code example of using the autoselect function to read the manufacturer ID. Refer to the Spansion Low Level Driver User’s Guide (available on www.spansion.com) for general information on Spansion Flash memory software development guidelines. /* Here is an example of Autoselect mode (getting manufacturer ID) */ /* Define UINT16 example: typedef unsigned short UINT16; */ UINT16 manuf_id; /* Auto Select Entry */ *( (UINT16 *)base_addr + 0x555 ) = 0x00AA; /* write unlock cycle 1 */ *( (UINT16 *)base_addr + 0x2AA ) = 0x0055; /* write unlock cycle 2 */ *( (UINT16 *)base_addr + 0x555 ) = 0x0090; /* write autoselect command */ /* multiple reads can be performed after entry */ manuf_id = *( (UINT16 *)base_addr + 0x000 ); /* read manuf. id */ /* Autoselect exit */ *( (UINT16 *)base_addr + 0x000 ) = 0x00F0; /* exit autoselect (write reset command) */ Table 7.4 Autoselect Entry in System (LLD Function = lld_AutoselectEntryCmd) Cycle Operation Byte Address Word Address Data Unlock Cycle 1 Write Base + AAAh Base + 555h 0x00AAh Unlock Cycle 2 Write Base + 555h Base + 2AAh 0x0055h Autoselect Command Write Base + AAAh Base + 555h 0x0090h Table 7.5 Autoselect Exit (LLD Function = lld_AutoselectExitCmd) Cycle Operation Byte Address Word Address Data Autoselect Exit Command Write base + XXXh base + XXXh 0x00F0h |
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