M16C62N Datasheet, PDF (23/213 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Processor Mode
Mitsubishi microcomputers
M16C / 62N Group (80-pin)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Processor mode register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
00 0 0 0
Symbol
PM0
Address
000416
When reset
0016
Bit symbol
Bit name
Function
RW
PM00
PM01
Processor mode bit
b1 b0
0 0: Single-chip mode
0 1: Must not be set
1 0: Must not be set
1 1: Must not be set
Reserved bit
Must always be set to “0”
PM03
Software reset bit
Reserved bit
The device is reset when this bit
is set to “1”. The value of this bit
is “0” when read.
Must always be set to “0”
Note: Set bit 1 of the protect register (address 000A16) to “1” when writing new
values to this register.
Processor mode register 1 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
0 00
0
Symbol
PM1
Address
000516
When reset
000000X02
Bit symbol
Bit name
Function
RW
Reserved bit
Must always be set to “0”
Nothing is assigned.
In an attempt to write to this bit, write “0”. The value, if read, turns out
to be indeterminate.
PM12
Watchdog timer function 0 : Interrupt
select bit
1 : Reset (Note 3)
(Note 3)
PM13
Internal reserved area
expansion bit (Note 2)
0 : The internal RAM area is 15 kbytes
or less and the internal ROM area
is 192 kbytes or less
1 : Expands the internal RAM area
and internal ROM area to over
15 kbytes and to over 192 kbytes
respectively. (Note 2)
Reserved bit
Must always be set to “0”
PM17
Wait bit
0 : No wait state
1 : Wait state inserted
Note 1: Set bit 1 of the protect register (address 000A16) to “1” when writing new values
to this register.
Note 2: When the reset is revoked, this bit is set to “0”. To expand the internal area,
set this bit to “1” in user program. And the top of user program must be allocated
to D000016 or subsequent address.
Note 3: This bit can only be set to “1”.
Figure 1.8.1. Processor mode registers 0 and 1
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