Communication Commands - NEC 78K0/KB1+ Preliminary User's Manual

21.6.4 Communication commands

The 78K0/KB1+ communicates with the dedicated flash programmer by using commands. The signals sent from
the flash programmer to the 78K0/KB1+ are called commands, and the commands sent from the 78K0/KB1+ to the
dedicated flash programmer are called response commands.
The flash memory control commands of the 78K0/KB1+ are listed in the table below. All these commands are
issued from the programmer and the 78K0/KB1+ performs processing corresponding to the respective commands.
Classification
Verify
Erase
Blank check
Data write
System setting, control
The 78K0/KB1+ returns a response command for the command issued by the dedicated flash programmer. The
response commands sent from the 78K0/KB1+ are listed below.
ACK
NAK
348
CHAPTER 21 FLASH MEMORY
Figure 21-16. Communication Commands
Command
Axxxx
Bxxxxx
Cxxxxxx
STATVE
PG-FP4
Response command
Dedicated flash
programmer
Table 21-8. Flash Memory Control Commands
Command Name
Batch verify command
Batch erase command
Batch blank check command
High-speed write command
Successive write command
Status read command
Oscillation frequency setting command
Erase time setting command
Write time setting command
Baud rate setting command
Silicon signature command
Reset command
Table 21-9. Response Commands
Command Name
Preliminary User's Manual U16846EJ1V0UD
78K0/KB1+
Compares the contents of the entire memory
with the input data.
Erases the contents of the entire memory.
Checks the erasure status of the entire memory.
Writes data by specifying the write address and
number of bytes to be written, and executes a
verify check.
Writes data from the address following that of
the high-speed write command executed
immediately before, and executes a verify
check.
Obtains the operation status
Sets the oscillation frequency
Sets the erase time for batch erase
Sets the write time for writing data
Sets the baud rate when UART is used
Reads the silicon signature information
Escapes from each status
Function
Acknowledges command/data.
Acknowledges illegal command/data.
Function