R01UH0823EJ0100 Rev.1.00
Page 825 of 1823
Jul 31, 2019
RX23W Group
30. Watchdog Timer (WDTA)
30.2.3
WDT Status Register (WDTSR)
Note 1. Only 0 can be written to clear the flag.
CNTVAL[13:0] Bits (Down-Counter Value)
Read these bits to confirm the value of the down-counter, but note that the read value may differ from the actual count by
a value of one count.
Read this flag to confirm whether or not an underflow has occurred in the down-counter.
The value 1 indicates that the down-counter has underflowed. The value 0 indicates that the down-counter has not
underflowed.
Write 0 to the UNDFF flag to set the value to 0. Writing 1 has no effect.
REFEF Flag (Refresh Error Flag)
Read this flag to confirm whether or not a refresh error (performing a refresh operation during a refresh-prohibited
period) has occurred.
The value 1 indicates that a refresh error has occurred. The value 0 indicates that no refresh error has occurred.
Write 0 to the REFEF flag to set the value to 0. Writing 1 has no effect.
Address(es): 0008 8024h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
REFEF UNDFF
CNTVAL[13:0]
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b13 to b0
Down-Counter Value
Value counted by the down-counter
R
b14
Underflow Flag
0: No underflow occurred
1: Underflow occurred
R(/W)
*
b15
Refresh Error Flag
0: No refresh error occurred
1: Refresh error occurred
R(/W)
*