E1/E20/E2/E2 Lite Additional Document
R20UT1994EJ0900 Rev.9.00
Page 40 of 58
Jan.20.22
3.3
MCU Resources to be Occupied
Figure 3-1 shows the areas which are occupied by the E1/E20/E2/E2 Lite for debugging.
These areas (shaded sections) are used for debugging. These areas should not be changed to save the
user program or data. If a change is made, control by the E1/E20/E2/E2 Lite is no longer possible.
However, when "No" is selected in the [Permit flash programming] property of the debugger, the internal
ROM spaces shown in Figure 3-1 and Figure 3-2 are not used (only the internal RAM spaces are used).
When selecting not to permit flash memory rewriting with the debugger's property, also refer to section 3.3.3,
Setting an On-Chip Debugging Option Byte, and section 3.5.2, Operation for Voltages and Flash Operation
Modes Not Permitting Flash Memory Rewriting.
Figure 3-1 MCU Resources to be Occupied (E1/E20)
Figure 3-2 MCU Resources to be Occupied (E2/E2 Lite)
00000h
Security ID area
10 bytes
000C3h
Reset vector area
2 bytes
00002h
Debug monitor area
2 bytes
00004h
On-chip debug
option byte area
1 byte
000C4h
000CEh
000D8h
Debug monitor area
256 bytes
Internal
ROM end
address
Internal ROM
space
Stack area
for debugging
4 bytes or 12 bytes
Debug monitor area
256 bytes
Debug monitor area
10 bytes
Internal
RAM end
address
Internal RAM
space
00000h
Security ID area
10 bytes
000C3h
Reset vector area
2 bytes
00002h
Debug monitor area
2 bytes
00004h
On-chip debug
option byte area
1 byte
000C4h
000CEh
Debug monitor area
10 bytes
000D8h
Debug monitor area
256 bytes
Debug monitor area
256 bytes
Stack area
for debugging
4 bytes, 8 bytes, or
12 bytes
Debug monitor area
256 bytes
Internal
ROM end
address
Internal ROM
space
Internal
RAM end
address
Internal RAM
space
