Processor Mode - Renesas M16C/29 Series Hardware Manual

M16C/29 Group

6. Processor Mode

This device functions in single-chip mode only. Figures 6.1 and 6.2 detail the associated registers.
Processor mode register 0 (Note)
b7 b6 b5 b4 b3 b2
0 0 0 0 0
Note: Write to this register after setting the PRC1 bit in the PRCR register to "1" (write enable).
Figure 6.1. PM0 Register
Processor mode register 1 (Note 1)
b7 b6 b5 b4 b3 b2
0
1
Note 1: Write to this register after setting the PRC1 bit in the PRCR register to "1" (write enable).
Note 2: To access the two 2K-byte data areas in data block A and data block B, this bit must be set to "1".
Note 3: When CPU rewrite mode (FMR01="1"), this bit is automatically set to "1" during that time.
Note 4: PM12 bit is set to 1 by writing a 1 in a program. (Writing a 0 has no effect.)
Note 5: When PM17 bit is set to "1" (with wait state), one wait state is inserted when accessing the internal RAM or
the internal ROM.
Figure 6.2. PM1 Register
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
b1 b0
Symbol
PM0
0 0
Bit symbol
Reserved bit
(b2-b0)
PM03 Software reset bit
Reserved bit
(b7-b4)
b1 b0 Symbol
PM1
0
Bit symbol
Flash data block access
PM10
bit (Note 2)
Reserved bit
(b1)
Watchdog timer function
PM12
select bit
Reserved bit
(b3)
Reserved bit
(b6-b4)
PM17 Wait bit (Note 5)
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Address After reset
0004 0000000 0
16 2
Bit name
Should be set to "0".
Setting this bit to "1" resets the
microcomputer.
When read, its content is "0".
Should be set to "0".
Address After reset
0005 0000100 0
16
Bit name
0: Disabled
1: Enabled (Note 3)
Should be set to "0".
0 : Watchdog timer interrupt
1 : Watchdog timer reset (Note 4)
Should be set to "1".
Should be set to "0".
0 : No wait state
1 : With wait state (1 wait)
6. Processor Mode
Function
RW
RW
RW
RW
2
Function
RW
RW
RW
RW
RW
RW
RW