Rohm LAPIS Semiconductor ML22660, Manual

Page: 32 / 117

FEDL22660-01
ML22660
The operation when no WDTCL command is entered is as follows.
<When "Transition to the command standby state after power-up" is selected by the second overflow of the WDT counter>
*1 Misoperation detection and failure detection outputs are selected by OUTSTAT command.
*2 Even if transferring to the command standby state after power-up by the second overflow of the the WDT counter, the
state of WDTERR bit and RSTERR bit remain. The state configured by OUTSTAT command also remains.
<When "Transition to the command standby state after power-up" is not selected by the second overflow of the WDT
counter>
*1 Misoperation detection and failure detection outputs are selected by OUTSTAT command.
WDTEN
Set WDTEN = "1"
Count-up
WDT counter
WDT overflow
WDTERR
*2
RSTERR
*2
0h
Command
SAFE WDTCL
Count-up 0h Count-up 0h
STATUSn pin
*1
n:1 or 2
Change to RSTERR = "1" on the second overflow of
the WDT counter.
Shifts to the command standby state after power-up.
Change to WDTERR = "1"on the
first overflow of the WDT counter.
Status
Stop WDT WDT operation Stop WDT
Signal to shift command
standby state after power-up
WDTEN
Set WDTEN = "1"
Count-up
WDT counter
WDT overflow
WDTERR
RSTERR
0h
Command
SAFE WDTCL
Count-up 0h Count-up
STATUSn pin
*1
n:1 or 2
Change to RSTERR = "1" on the second overflow of the
WDT counter.
No shifting to command standby state after power-up
Change to WDTERR = "1"on the
first overflow of the WDT counter.
Status
Stop WDT WDT operation
Signal to shift command
standby state after power-up
0h Count-up
32/116