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3.3 Operation Modes
The V850/SA1 has the following operations modes.
(1) Normal operation mode (Single-chip mode)
After the system has been released from the reset status, the pins related to the bus interface are set for port
mode, execution branches to the reset entry address of the internal ROM, and instruction processing written in
the internal ROM is started.
memory area is enabled by setting in the memory expansion mode register (MM) by instruction.
(2) Flash memory programming mode
This mode is provided only to the µ PD70F3017 and 70F3017Y. The internal flash memory is programmable or
erasable when the V
PP
flash memory is under investigation.
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CHAPTER 3
However, external expansion mode that connects external device to external
voltage is applied to V
pin . The state transition to the programming or erasing of the
PP
V
PP
0
Normal-operation mode
7.8 V
Flash memory programming mode
V
Setting prohibited
DD
CPU FUNCTIONS
Operation Mode
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