upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 770

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

22.2 Security Function
The V850E/RS1 series have a security function that limits starting of the N-Wire emulator by comparing
an ID code written in advance to the internal ROM area with an ID code that is input when the debugger
is started, when the N-Wire emulator is connected. This function prevents a third party from reading the
internal ROM area.
(1)
(2)
Cautions: 1. If the value of address 00000079H is 00H to 7FH, the N-Wire emulator cannot be
770
ID code
Be sure to write an ID code when writing a program to the internal ROM.
The area of the ID code is 10 bytes wide and in the range of addresses 00000070H to
00000079H.
The ID code when the memory is erased is shown below.
Security bit
Bit 7 of address 00000079H enables or disables use of the N-Wire emulator.
• Bit 7 of address 00000079H
0: Disable
1: Enable
2. If the value of address 00000079H is 80H to FFH, the N-Wire emulator can be
connected.
connected if the 10-byte ID code to be input when the N-Wire emulator is
connected matches.
00000079H
00000078H
00000077H
00000076H
00000075H
00000074H
00000073H
00000072H
00000071H
00000070H
Chapter 22 On-Chip Debug Function
Address
User’s Manual U16702EE3V2UD00
Table 22-1: ID Code
FFH
FFH
FFH
FFH
FFH
FFH
FFH
FFH
FFH
FFH
ID Code