Flash EEPROM Module.ppt

Flash EEPROMModule NVM FLASH EEPROM Memory Map Flash Control Flash Control Registers Flash Clock Divider Register Flash Security Flash Security Control Flash Configuration Flash Protection Higher AddressRange Protection Lower AddressProtection Range Memory Protection Flash Status Access Errors Flash Command Erase Flowchart Programming Flowchart EEPROM4K BYTE EEPROM Features 4K EEPROM MODULE MC9S12 0.25u EEPROM Info EEPROM Register Summary Three Configuration registers Clock Divider Register (ECLKDIV) Prescaler value for the EEPROM sub-system clock. MUST be configured to generate a module clock between 150KHz and 200KHz for program erase. Configuration Register (ECNFG) Enables EEPROM interrupts Protection Register (EPROT) Controls whether the EEPROM is protected against program erase. Configures the size of the protected block – all 4K OR 64 to 512 bytes. Loaded from the non-volatile EEPROM Protection Field on Reset. EEPROM Module Clock Prescaler EEPROM Configuration EEPROM Protection EEPROM Status Access Errors HCS12 Technical Training Module 14-NVM, Slide * MOTOROLA and the Stylized M Logo are registered in the US Patent Trademark Office. All other product or service names are the property of their respective owners. ? Motorola, Inc. 2001. System Memory Internal Bus SCI 1 256K FLASH EEPROM 12K SRAM ATD 1 HCS12 CPU BKP INT MMI CM BDM MEBI 4K BYTES EEPROM SIM msCAN 3 msCAN 2 msCAN 1 SCI 1 SPI 2 or PWM CH 4-7 BDLC or msCAN 0 msCAN 4 or IIC SPI 1 or PWM CH 0-3 SPI 0 ATD 0 PLL PIT ECT 8 CHAN PWM 8 CHAN ? 256K bytes of Flash made of four 64K byte blocks Single supply program and erase. Automated program and erase algorithm. Interrupt on command completion. All four flash blocks can be programmed and erased in parallel. Read-While-Write into different block. Fast sector erase and word program operation. Flexible protection scheme against accidental program or erase.