upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 65

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

3.3 Operation Modes
(1) Normal operation mode (single-chip mode)
(2) Flash memory programming mode
The V850/SA1 has the following operation modes.
After the system has been released from the reset status, the pins related to the bus interface are set to port
mode, execution branches to the reset entry address of the internal ROM, and instruction processing written in
the internal ROM is started. The external expansion mode in which an external device can be connected to
external memory area is enabled by setting the memory expansion mode register (MM) by an instruction.
This mode is provided only in the
memory is programmable or erasable when the V
7.8 V
V
V
0
PP
DD
µ
PD70F3015B, 70F3015BY, 70F3017A, and 70F3017AY. The internal flash
Normal operation mode
Flash memory programming mode
Setting prohibited
CHAPTER 3 CPU FUNCTIONS
User’s Manual U12768EJ4V1UD
PP
voltage is applied to the V
Operation Mode
PP
pin.
65