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S29GL512T10FHIyyx Datasheet(PDF) 10 Page - Cypress Semiconductor |
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S29GL512T10FHIyyx Datasheet(HTML) 10 Page - Cypress Semiconductor |
10 / 105 page Document Number: 002-00247 Rev. *G Page 10 of 105 S29GL01GT, S29GL512T The sector address supplied during the Secure Silicon Entry command selects the Flash Memory Array sector that is overlaid by the Secure Silicon Region address map. The SSR is overlaid starting at location 0 in the selected sector. Use of the sector 0 address is recommended for future compatibility. While the SSR ASO is entered the content of all other sectors is memory core data for read operations. Program is not allowed outside of ASO. 2.6 Sector Protection Control 2.6.1 Lock Register ASO The Lock register ASO contains a single word of OTP memory. When the ASO is entered the Lock Register appears at all word locations in the device address space. However, it is recommended to read or program the Lock Register only at location 0 of the device address space for future compatibility. 2.6.2 Persistent Protection Bits (PPB) ASO The PPB ASO contains one bit of a Flash Memory Array for each Sector in the device. When the PPB ASO is entered, the PPB bit for a sector appears in the Least Significant Bit (LSB) of each address in the sector. Reading any address in a sector displays data where the LSB indicates the non-volatile protection status for that sector. However, it is recommended to read or program the PPB only at address 0 of the sector for future compatibility. If the bit is 0 the sector is protected against programming and erase operations. If the bit is 1 the sector is not protected by the PPB. The sector may be protected by other features of ASP. 2.6.3 PPB LOCK ASO The PPB Lock ASO contains a single bit of volatile memory. The bit controls whether the bits in the PPB ASO may be programmed or erased. If the bit is 0 the PPB ASO is protected against programming and erase operations. If the bit is 1 the PPB ASO is not protected. When the PPB Lock ASO is entered the PPB Lock bit appears in the least significant bit (LSB) of each address in the device address space. However, it is recommended to read or program the PPB Lock only at address 0 of the device for future compatibility. 2.6.4 Password ASO The Password ASO contains four words of OTP memory. When the ASO is entered the Password appears starting at address 0 in the device address space. All locations above the fourth word are undefined. 2.6.5 Dynamic Protection Bits (DYB) ASO The DYB ASO contains one bit of a volatile memory array for each Sector in the device. When the DYB ASO is entered, the DYB bit for a sector appears in the least significant bit (LSB) of each address in the sector. Reading any address in a sector displays data where the LSB indicates the non-volatile protection status for that sector. However, it is recommended to read, set, or clear the DYB only at address 0 of the sector for future compatibility. If the bit is 0 the sector is protected against programming and erase operations. If the bit is 1 the sector is not protected by the DYB. The sector may be protected by other features of ASP. Table 2.4 Secure Silicon Region Word Address Range Byte Address Range Content Region Size (SA) + 0000h to 00FFh (SA) + 0000h to 01FFh Factory Locked Secure Silicon Region SSR0 512 bytes (SA) + 0100h to 01FFh (SA) + 0200h to 03FFh Customer Locked Secure Silicon Region SSR1 512 bytes (SA) + 0200h to 02FFh (SA) + 0400h to 05FFh Customer Locked Secure Silicon Region SSR2 512 bytes (SA) + 0300h to 03FFh (SA) + 0600h to 07FFh Customer Locked Secure Silicon Region with Read Password SSR3 512 bytes (SA) + 0400h to FFFFh (SA) + 0800h to 1FFFFh Undefined n/a 126 kbytes |
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