p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 352

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 14 Watchdog Timer (WDT)
14.6.3
If CKS2 to CKS0 bits in TCSR are written to while the WDT is operating, errors could occur in
the incrementation. Software must stop the watchdog timer (by clearing the TME bit to 0) before
changing the values of CKS2 to CKS0 bits.
14.6.4
If the PSS bit in TCSR_1 is written to while the WDT is operating, errors could occur in the
operation. Stop the watchdog timer (by clearing the TME bit to 0) before changing the values of
PSS bit.
14.6.5
If the mode is switched from/to watchdog timer to/from interval timer, while the WDT is
operating, errors could occur in the operation. Software must stop the watchdog timer (by clearing
the TME bit to 0) before switching the mode.
Rev. 1.00 Sep. 21, 2006 Page 314 of 658
REJ09B0310-0100
Changing Values of CKS2 to CKS0 Bits
Changing Value of PSS Bit
Switching between Watchdog Timer Mode and Interval Timer Mode