M16C62P_06 Datasheet, PDF (68/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
6. Voltage Detection Circuit
Watchdog Timer Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0
Symbol
Address
WDC
000Fh
Bit Symbol
Bit Name
—
High-order Bit of Watchdog Timer
(b4-b0)
After Reset
00XXXXXXb⁽²⁾
Function
RW
RO
Cold Start / Warm Start Discrimination 0 : Cold Start
WDC5 _{Flag (1, 2)}
1 : Warm Start
RW
—
Reserved Bit
Set to “0”
(b6)
RW
Prescaler Select Bit
0 : Divided by 16
WDC7
1 : Divided by 128
RW
NOTES :
1. Writing to the WDC register factors the WDC5 bit to be set to “1” (w arm start). If the voltage applied to VCC1 is less
than 4.0 V, either w rite to this register w hen the CPU clock frequency is 2 MHz or w rite tw ice.
2. The WDC5 bit is set to “0” (cold start) w hen pow er is turned on and can be set to “1” by program only.
Figure 6.9 WDC Register
Rev.2.41 Jan 10, 2006 Page 53 of 390
REJ09B0185-0241