AN2400 Freescale Semiconductor / Motorola, AN2400 Datasheet - Page 11

• Manufacturer Part Number: AN2400
• Description: HCS12 NVM Guidelines
• Manufacturer: Freescale Semiconductor / Motorola

MOTOROLA
If the command is accepted by the state machine, the CCIF bit will be cleared
indicating that the command is in progress and the CBEIF bit will be set again
indicating that the command, address and data buffers are ready to accept the
next command sequence for pipelined operation. If the command is not
accepted by the state machine, the CCIF bit will not be cleared and the
ACCERR or PVIOL bit will be set indicating an error.
2. Write the desired command to the FCMD/ECMD register. Valid
3. Launch the command by writing $80 to the FSTAT/ESTAT register to
Freescale Semiconductor, Inc.
For More Information On This Product,
Status Register
Status Register
commands are listed in
clear the CBEIF bit.
0 0 0 0 0 0 0 0
1 1 0 0 0 0 0 0
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HCS12 NVM Guidelines
Figure 10. NVM Program Command Write
Command State Machine
Command State Machine
Figure 11. NVM Command Launch
Command Register
Command Register
Control
Control
Starting
$20
$20
Idle
Table 2. Valid Flash/EEPROM
Address Register
Address Register
Address Buffer
Address Buffer
Address Bus
NVM
Address Bus
NVM
Address
Address
Address
Empty
Data Register
Data Register
Data Buffer
Data Buffer
Split-Gate Flash Memory
Data Bus
Data Bus
Empty
Data
Data
Data
Commands.
AN2400/D
11