MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
620
Preliminary
D-Flash Sector
— The D-Flash sector is the smallest portion of the D-Flash memory that can be erased.
The D-Flash sector consists of four 64 byte rows for a total of 256 bytes.
NVM Command Mode
— An NVM mode using the CPU to setup the FCCOB register to pass parameters
required for Flash command execution.
Phrase
— An aligned group of four 16-bit words within the P-Flash memory. Each phrase includes eight
ECC bits for single bit fault correction and double bit fault detection within the phrase.
P-Flash Memory
— The P-Flash memory constitutes the main nonvolatile memory store for applications.
P-Flash Sector
— The P-Flash sector is the smallest portion of the P-Flash memory that can be erased.
Each P-Flash sector contains 1024 bytes.
Program IFR
— Nonvolatile information register located in the P-Flash block that contains the Device
ID, Version ID, and the Program Once field. The Program IFR is visible in the global memory map by
setting the PGMIFRON bit in the MMCCTL1 register.
19.1.2
Features
19.1.2.1
P-Flash Features
•
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
19.1.2.2
D-Flash Features
•
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
19.1.2.3
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
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