CHAPTER 3 CPU FUNCTIONS
User’s Manual U13850EJ6V0UD
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3.3 Operation Modes
The V850/SB1 and V850/SB2 have the following operation 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. However, external expansion mode that connects external device to external
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 in the flash memory versions. The internal flash memory is programmable or erasable
when the V
PP
voltage is applied to the V
PP
pin.
V
PP
Operation Mode
0
Normal operation mode
7.8 V
Flash memory programming mode
V
DD
Setting prohibited
Содержание V850/SB1
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