MC9S12XS256 Datasheet, PDF (507/736 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

18.1.2 Features
256 KByte Flash Module (S12XFTMR256K1V1)
18.1.2.1 P-Flash Features
• 256 Kbytes of P-Flash memory composed of one 256 Kbyte Flash block divided into 256 sectors
of 1024 bytes
• Single bit fault correction and double bit fault detection within a 64-bit phrase during read
operations
• Automated program and erase algorithm with verify and generation of ECC parity bits
• Fast sector erase and phrase program operation
• Flexible protection scheme to prevent accidental program or erase of P-Flash memory
18.1.2.2 D-Flash Features
• 8 Kbytes of D-Flash memory composed of one 8 Kbyte Flash block divided into 32 sectors of 256
bytes
• Single bit fault correction and double bit fault detection within a word during read operations
• Automated program and erase algorithm with verify and generation of ECC parity bits
• Fast sector erase and word program operation
• Protection scheme to prevent accidental program or erase of D-Flash memory
• Ability to program up to four words in a burst sequence
18.1.2.3 Other Flash Module Features
• No external high-voltage power supply required for Flash memory program and erase operations
• Interrupt generation on Flash command completion and Flash error detection
• Security mechanism to prevent unauthorized access to the Flash memory
18.1.3 Block Diagram
The block diagram of the Flash module is shown in Figure 18-1.
S12XS Family Reference Manual, Rev. 1.09
Freescale Semiconductor
507