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CHAPTER 16
The µ PD70F3017 and 70F3017Y of the V850/SA1 are provided with a 256-Kbyte flash memory. In the instruction
fetch to this flash memory, 4 bytes can be accessed by a single clock as well as the mask ROM version.
Writing to a flash memory can be performed with memory mounted on the target system (on board).
dedicated flash writer is connected to the target system to perform writing.
The followings can be considered as the development environment and the applications using a flash memory.
• Software can be altered after the V850/SA1 is solder mounted on the target system.
• Small scale production of various models is made easier by differentiating software.
• Data adjustment in starting mass production is made easier.
16.1 Features
• 4-byte/1-clock access (in instruction fetch access)
• All area one-shot erase
• Communication through serial interface from the dedicated flash writer
• Erase/write voltage: V
• On-board programming
• Number of rewrite: 100 times (target)
16.2 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 the V850/SA1 is mounted on the target system. Mount
connectors, etc., on the target system to connect the dedicated flash writer.
(2) Off-board programming
Writing to a flash memory is performed by the dedicated program adapter (FA Series), etc., before mounting the
V850/SA1 on the target system.
Remark
FA Series is a product of Naito Densei Machida Seisakusho Co., Ltd.
FLASH MEMORY ( µ µ µ µ PD70F3017, 70F3017Y)
= 7.8 V
PP
The
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