HD64F3687GHV Datasheet, PDF (419/566 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 19 Band-Gap Circuit, Power-On Reset, and Low-Voltage Detection Circuits
19.2.3 Reset Source Decision Register (LVDRF)
LVDSR indicates sources of resets.
Initial
Bit
Bit Name Value R/W Description
7 to 2 


Reserved
The read value is undefined and these bits cannot be
modified.
1
PRST
*¹
R/W POR/LVDR Detection
[Setting conditions]
• When a power-on reset has occurred
• When an LVDR has occurred
[Clearing condition]
0
WRST
*²
When writing 0
R/W WDT Reset Detection
[Setting condition]
• When a reset by the WDT has occurred
[Clearing conditions]
• When a power-on reset has occurred
• When an LVDR has occurred
• When an reset signal input on the external pin has
asserted
• When writing 0
Notes: 1. The initial value depends on the condition when the PRST bit is set or cleared.
2. The initial value depends on the condition when the WRST bit is set or cleared.
Rev. 3.00 Sep. 10, 2007 Page 385 of 528
REJ09B0216-0300