M16C65 Datasheet, PDF (190/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
10. Processor Mode
PM13 (Internal Area Expansion Bit 0) (b3)
This bit is used to select the range of the RAM, program ROM 1, and external area.
When the PM13 bit is 0, the size of the RAM and program ROM 1 is limited, but a wide range can be
selected for the external area.
When the PM13 bit is 1, the entire RAM and the program ROM 1 in addresses 80000h to CFFFFh are
available. Table 10.5 lists the Functions of Bits PM13 and IRON and Table 10.6 lists Functions of
Addresses 80000h to CFFFFh.
Table 10.5 Functions of Bits PM13 and IRON
Bit Setting
Access Area
PM13 = 0
PM13 = 1
IRON = 0 ⁽¹⁾
IRON = 0
IRON = 1
Internal RAM
Addresses 00400h up to
03FFFh (15 Kbytes) are
available (addresses
0400h to 0CFFFh cannot
be used).
The entire area is usable.
The entire area is
usable.
Program ROM 1
Addresses D0000h up to Addresses 80000h up to
FFFFFh (192 Kbytes) are FFFFFh are available
available (addresses
(addresses 40000h to
40000h to CFFFFh cannot 7FFFFh cannot be used).
be used).
The entire area is
usable.
External Memory
expansion
mode
04000h to Usable
0CFFFh
40000h to Usable
7FFFFh
Reserved
Usable
Reserved
Reserved
80000 to Usable
CFFFFh
Reserved
Reserved
Micro-
processor
mode
04000h to Usable
0CFFFh
40000h to Usable
7FFFFh
Reserved
Usable
Reserved
Usable
80000 to Usable
CFFFFh
Usable
Usable
PM13: Bit in the PM1 register
IRON: Bit in the PRG2C register
Note:
1. When the PM13 bit is 0, set the IRON bit to 0.
Table 10.6 Functions of Addresses 80000h to CFFFFh
PM13 Bit in PM1 Register
0
1
Processor Mode Single-chip mode
Memory expansion
mode
Reserved area Program ROM 1 (when program ROM 1 exists)
External area ^{if not, reserved area}
Microprocessor mode External area External area
The PM13 bit is automatically set to 1 while the FMR01 bit in the FMR0 register is set to 1 (CPU rewrite
mode).
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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