R8C/1A Group, R8C/1B Group
8. Processor Mode
Rev.1.30
Dec 08, 2006
Page 56 of 315
REJ09B0252-0130
Figure 8.2
PM1 Register
Processor Mode Register 1
(1)
Symbol
Address
After Reset
PM1
0005h
00h
Bit Symbol
Bit Name
Function
RW
NOTES :
1.
2.
—
The PM12 bit is set to 1 by a program (and remains unchanged even if 0 is w ritten to it).
When the CSPRO bit in the CSPR register is set to 1 (count source protect mode enabled), the PM12 bit is
automatically set to 1.
Reserved bit
Set to 0.
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined.
Set the PRC1 bit in the PRCR register to 1 (w rite enable) before rew riting the PM1 register.
—
(b6-b3)
PM12
WDT interrupt/reset sw itch bit
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
—
(b7)
RW
b3 b2
—
b1 b0
0
0 : Watchdog timer interrupt
1 : Watchdog timer reset
(2)
RW
b7 b6 b5 b4
0
—
(b1)
RW
Reserved bit
Set to 0.
—
(b0)