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20.2 Writing by Flash writer
Writing can be performed either on-board or off-board by the dedicated flash writer.
(1)
On-board programming
The contents of the flash memory is rewritten after µPD70F3123 is mounted on the target system. It
has to be ensured that the signals required for programming are made available to the flash writer.
(2)
Off-board programming
Writing to a flash memory is performed using a dedicated programming adapter (PA board), etc.,
before mounting the µPD70F3123 onto the target system.
20.3 Programming Environment
The following diagram shows the environment required for writing programs to the flash memory of the
µPD70F3123.
Figure 20-1: Programming Environment in Conjunction with External Flash Writer
Host machine
A host machine can be used to control the flash writer.
CSI0 is used as the interface between the flash writer and the µPD70F3123 to perform writing, erasing,
etc. A programming adapter board is required for off-board writing.
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Chapter 20 Flash Memory (µPD70F3123)
RS232
Dedicated flash writer
Preliminary User's Manual U14913EE1V0UM00
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µPD70F3123
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