Chapter 21 64 KB Flash Module (S12ZFTMRZ64K2KV2)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
689
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 two
sets of aligned double words with each set including 7 ECC bits for single bit fault correction and double
bit fault detection within each double word.
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 512 bytes.
Program IFR
— Nonvolatile information register located in the P-Flash block that contains the Version
ID, and the Program Once field.
21.1.2
Features
21.1.2.1
P-Flash Features
•
64 KB of P-Flash composed of one 64 KB Flash block divided into 128 sectors of 512 bytes
•
Single bit fault correction and double bit fault detection within a 32-bit double word during read
operations
•
Automated program and erase algorithm with verify and generation of ECC parity bits
•
Fast sector erase and phrase program operation
•
Ability to read the P-Flash memory while programming a word in the EEPROM memory
•
Flexible protection scheme to prevent accidental program or erase of P-Flash memory
21.1.2.2
EEPROM Features
•
2 KB of EEPROM memory composed of one 2 KB Flash block divided into 512 sectors of 4 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 EEPROM memory
•
Ability to program up to four words in a burst sequence
21.1.2.3
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
21.1.3
Block Diagram
The block diagram of the Flash module is shown in
.
