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CHAPTER 17 FLASH MEMORY (
µµµµ
PD70F3089Y)
User’s Manual U15109EJ3V0UD
506
The following shows the commands for flash memory control of the V850/SC1, V850/SC2, and V850/SC3. All of
these commands are issued from the dedicated flash programmer, and the V850/SC1, V850/SC2, and V850/SC3
perform the various processings corresponding to the commands.
Table 17-5. Flash Memory Control Commands
Category
Command Name
Function
Verify
Batch verify command
Compares the contents of the entire memory and
the input data.
Batch erase command
Erases the contents of the entire memory.
Erase
Write back command
Writes back the contents which is overerased.
Blank check
Batch blank check command
Checks the erase state of the entire memory.
High-speed write command
Writes data by the specification of the write
address and the number of bytes to be written,
and executes verify check.
Data write
Continuous write command
Writes data from the address following the high-
speed write command executed immediately
before, and executes verify check.
Status read out command
Acquires the status of operations.
Oscillating frequency setting
command
Sets the oscillating frequency.
Erasure time setting command
Sets the erasing time of batch erase.
Write time setting command
Sets the writing time of data write.
Write back time setting command
Sets the write back time.
Baud rate setting command
Sets the baud rate when using UART.
Silicon signature command
Reads outs the silicon signature information.
System setting and control
Reset command
Escapes from each state.
The V850/SC1, V850/SC2, and V850/SC3 send back response commands to the commands issued from the
dedicated flash programmer. The following shows the response commands the V850/SC1, V850/SC2, and
V850/SC3 send out.
Table 17-6. Response Commands
Response Command Name
Function
ACK (acknowledge)
Acknowledges command/data, etc.
NAK (not acknowledge)
Acknowledges illegal command/data, etc.