Limitations On Memory Extension; Precautions On Internal Reserved Area Expansion Bit - Renesas M16C FAMILY User Manual

5.2.3 Limitations on Memory Extension

When using memory extension, make sure the power source supply selector on the
USB Monitor Board is set to the
be supplied from the Target Board. Memory extension cannot be used when the
selector is set to the USB side.

5.2.4 Precautions on Internal Reserved Area Expansion Bit

a. M16C/62A (M), M16C/62P
The Target MCU operates when the PM13 bit (Internal Reserved Area Expansion Bit) is
set to "1" (Expands the internal RAM area and internal ROM area to over 15KB and to
over 192KB respectively) for 256KB or above version of the M16C/62A (M) and 62P
groups. Since the access area of the internal memory is limited (The Monitor Program
RAM area is limited) by setting the PM13 bit to "0", the KD will not be able to be used.
Therefore, do not set the PM13 bit to "0" on the User Program.
Applicable MCUs: M30624FGAFP/GP, M30625FGAGP, M30624FGMFP/GP
b. M16C/6N (6N4)
The Target MCU operates when the PM13 bit (Internal Reserved Area Expansion Bit) is
set to "1" (Expands the internal ROM area to over 192KB) for 256KB version of the
M16C/6N (6N4) group. Although the PM13 bit is set to "0", the Monitor Program area is
not limited and the KD will be able to be used. However, the area of C0000h to CFFFFh
cannot be used.
Applicable MCUs: M306N4FGTFP
c. M16C/6N (6NA)
The Target MCU operates when the PM13 (Internal Reserved Area Expansion BIt) is
set to "0" (The internal ROM area is 192KB or less) for 256KB version of the M16C/6N
(6NA) group. Therefore, the area of C0000h to CFFFFh cannot be used. When using
the area of C0000h to CFFFFh, set the address after D0000h to the reset vector and set
the PM13 bit to "1" on the User Program which operates from the address after D0000h.
Applicable MCUs: M306NAFGTFP
TARGET
M30625FGMGP, M30624FGPFP/GP, M30625FGPGP
M30626FHPFP/GP, M30627FHPGP, M30626FJPFP/GP
M30627FJPGP
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side so that the power for the Target MCU will
5 Using the KD