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The following shows the commands for flash memory control of the V850/SB1 and V850/SB2. All of these
commands are issued from the dedicated flash programmer, and the V850/SB1 and V850/SB2 perform the various
processing corresponding to the commands.
Category
Verify
Erase
Blank check
Data write
System setting and control
The V850/SB1 and V850/SB2 send back response commands to the commands issued from the dedicated flash
programmer. The following shows the response commands the V850/SB1 and V850/SB2 send out.
Response Command Name
ACK (acknowledge)
NAK (not acknowledge)
18.6.5 Resources used
The resources used in the flash memory programming mode are all the FFE000H to FFE7FFH area of the internal
RAM and all the registers. The FFE800H to FFEFFFH area of the internal RAM retains data as long as the power is
on. The registers that are initialized by reset are changed to the default values.
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CHAPTER 18
FLASH MEMORY
Table 18-6. Flash Memory Control Command
Command Name
One-short verify command
Area verify command
Area erase command
Writeback command
One-shot blank check command
Area blank check command
High-speed write command
Continuous write command
Status read out command
Oscillating frequency setting
command
Erasing time setting command
Writing time setting command
Writeback time setting command
Baud rate setting command
Silicon signature command
Reset command
Table 18-7. Response Command
Acknowledges command/data, etc.
Acknowledges illegal command/data, etc.
User's Manual U13850EJ6V0UD
Function
Compares the contents of the entire memory and
the input data.
Compares the contents of the specified area and
the input data
Erases the specified area.
Writes back the erased contents.
Checks the erase state of the entire memory.
Checks the erase state of the specified area.
Writes data by the specification of the write
address and the number of bytes to be written,
and executes a verify check.
Writes data from the address following the high-
speed write command executed immediately
before, and executes a verify check.
Acquires the status of operations.
Sets the oscillation frequency.
Sets the erasing time of one-shot erase.
Sets the writing time of data write.
Sets the writeback time.
Sets the baud rate when using UART.
Reads outs the silicon signature information.
Escapes from each state.
Function
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