Eon Silicon Solution Inc. Page 1/6 Migration from EN25B20 to EN25F20 Part No. : EN25F20 Issued date : 2008 / 03 / 25 Prepared by : FAE engineer：Sunny Tai Approval by : FAE Manager：Jason Tseng This Application Note may be revised by subsequent versions or modifications due to changes in technical specifications. ©2005 Eon Silicon Solution Inc. www.essi.com.tw Rev. A, Issue Date: 2008/ 03/ 25 Eon Silicon Solution Inc. Page 2/6 1. Purpose EN25B20 will EOL and be replaced by EN25F20 which can offer uniform 4Kbytes sector and allow for greater flexibility in applications. This note highlights the difference between those two devices. It helps customers to migrate into new device. 2. Difference z High Performance EN25F20 ---100MHz clock rate EN25B20 ---75MHz clock rate z Block Sector Architecture EN25F20：Uniform sector Architecture - 64 sectors of 4KB 4 blocks of 64KB Any sector or block can be erased individually EN25B20：Flexible sector Architecture z Two 4KB, one 8KB, one 16KB, one 32KB and three 64KB sectors Erasable EN25F20 --- Sector, Block or Chip erasable EN25B20 --- Sector or Chip erasable Note : In the condition of erasing the boot sector of EN25B20 to be replaced with EN25F20, one or multiple sector erase command (20h) must be issued in EN25F20 depending on the sector size. The correlation table is shown below. This Application Note may be revised by subsequent versions or modifications due to changes in technical specifications. ©2005 Eon Silicon Solution Inc. www.essi.com.tw Rev. A, Issue Date: 2008/ 03/ 25 Eon Silicon Solution Inc. Sector Size Address Range EN25B20 Page 3/6 EN25F20 4KByte 00000h-00FFFh Issue sector erase (D8h) for sector 0 Issue sector erase (20h) for sector 0 4KByte 01000h-01FFFh Issue sector erase (D8h) for sector 1 Issue sector erase (20h) for sector 1 02000h-03FFFh Issue sector erase (D8h) for sector 2 8KByte Issue sector erase (20h) for sector 2 Issue sector erase (20h) for sector 3 Issue sector erase (20h) for sector 4 16KByte 04000h-07FFFh Issue sector erase (D8h) for sector 3 Issue sector erase (20h) for sector 5 Issue sector erase (20h) for sector 6 Issue sector erase (20h) for sector 7 Issue sector erase (20h) for sector 8 32KByte 08000h-0FFFFh Issue sector erase (D8h) for sector 4 . . . . Issue sector erase (20h) for sector 15 z Support Lockable 256 byte OTP security sector EN25F20 ---Yes EN25B20 ---No This Application Note may be revised by subsequent versions or modifications due to changes in technical specifications. ©2005 Eon Silicon Solution Inc. www.essi.com.tw Rev. A, Issue Date: 2008/ 03/ 25 Eon Silicon Solution Inc. z Page 4/6 Manufacturer and Device Identification EN25F20： OP Code (M7-M0) (ID15-ID0) ABh (ID7-ID0) 11h 90h 1Ch 9Fh 1Ch 11h 3112h EN25B20： Boot Type OP Code (M7-M0) (ID15-ID0) (ID7-ID0) ABh EN25B20(Bottom Boot) z 31h 90h 1Ch 9Fh 1Ch 31h 2012h Protected Area Sizes Sector Organization EN25F20： Status Register Memory Content Content Protect Blocks Addresses Density(KB) Portion BP2 Bit BP1 Bit BP0 Bit 1 1 1 All 000000h-03FFFFh 256KB All 1 1 0 sector 0 to sector 61 000000h-03DFFFh 248KB Lower 31/32 1 0 1 sector 0 to sector 59 000000h-03BFFFh 240KB Lower 30/32 1 0 0 None None None None 0 1 1 All 000000h-03FFFFh 256KB All 0 1 0 Block 2 to 3 020000h-03FFFFh 128KB Upper 1/2 0 0 1 Block 3 030000h-03FFFFh 64KB Upper 1/4 0 0 0 None None None None This Application Note may be revised by subsequent versions or modifications due to changes in technical specifications. ©2005 Eon Silicon Solution Inc. www.essi.com.tw Rev. A, Issue Date: 2008/ 03/ 25 Eon Silicon Solution Inc. Page 5/6 EN25B20： Status Register Memory Content Content BP2 Bit BP1 Bit BP0 Bit Protect Sectors Addresses Density(KB) Portion 0 0 0 None None None None 0 0 1 Sector 7 03F000h-03FFFFh 4KB Upper 1/64 0 1 0 Sector 6 to 7 03E000h-03FFFFh 8KB Upper 1/32 0 1 1 Sector 5 to 7 03C000h-03FFFFh 16KB Upper 1/16 1 0 0 Sector 4 to 7 038000h-03FFFFh 32KB Upper 1/8 1 0 1 Sector 3 to 7 030000h-03FFFFh 64KB Upper 1/4 1 1 0 Sector 2 to 7 020000h-03FFFFh 128KB Upper 1/2 1 1 1 All 000000h-03FFFFh 256KB All z Instruction Set Comparison A Sector Erase (20h) instruction is implemented in EN25F20 for 4KB sector erase. A Block Erase (D8h) instruction in EN25F20 is compatible with EN25B20 for 64KB block erase and the chip erase instruction is same between two devices. EN25F20： Instruction Name Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 n-Bytes Byte 5 Byte 6 n-Bytes Code Sector Erase 20h A23-A16 A15-A8 A7-A0 Block Erase D8h/ 52h A23-A16 A15-A8 A7-A0 Chip Erase C7h/ 60h Enter OTP mode 3Ah Byte 2 Byte 3 Byte 4 A23-A16 A15-A8 A7-A0 EN25B20： Instruction Name Byte 1 Code Sector Erase D8h Bulk Erase C7h This Application Note may be revised by subsequent versions or modifications due to changes in technical specifications. ©2005 Eon Silicon Solution Inc. www.essi.com.tw Rev. A, Issue Date: 2008/ 03/ 25 Eon Silicon Solution Inc. Page 6/6 Revisions History Revision No Description Date A Initial Release. 2008/03/25 This Application Note may be revised by subsequent versions or modifications due to changes in technical specifications. ©2005 Eon Silicon Solution Inc. www.essi.com.tw Rev. A, Issue Date: 2008/ 03/ 25