NXP Semiconductors KE1xF Series, Reference Manual, Page: 711 / 1483

WDOG_CS field descriptions (continued)
Field Description
15
WIN
Watchdog Window
This write-once bit enables window mode. See the Window mode section.
0 Window mode disabled.
1 Window mode enabled.
14
FLG
Watchdog Interrupt Flag
This bit is an interrupt indicator when INT is set in control and status register 1. Write 1 to clear it.
0 No interrupt occurred.
1 An interrupt occurred.
13
CMD32EN
Enables or disables WDOG support for 32-bit (otherwise 16-bit or 8-bit) refresh/unlock command write
words
This is write-once field, and the user needs to unlock WDOG after writing this field for reconfiguration.
0 Disables support for 32-bit refresh/unlock command write words. Only 16-bit or 8-bit is supported.
1 Enables support for 32-bit refresh/unlock command write words. 16-bit or 8-bit is NOT supported.
12
PRES
Watchdog prescaler
This write-once bit enables a fixed 256 pre-scaling of watchdog counter reference clock. (The block
diagram shows this clock divider option.)
0 256 prescaler disabled.
1 256 prescaler enabled.
11
ULK
Unlock status
This read-only bit indicates whether WDOG is unlocked or not. Default reset value is 1.
0 WDOG is locked.
1 WDOG is unlocked.
10
RCS
Reconfiguration Success
This read-only bit indicates whether the reconfiguration is successful or not. Default reset value is 0.This
bit is set when new configuration takes effect, and is cleared by successful unlock command.
0 Reconfiguring WDOG.
1 Reconfiguration is successful.
9–8
CLK
Watchdog Clock
This write-once field indicates the clock source that feeds the watchdog counter. See the Clock source
section.
00 Bus clock
01 LPO clock
10 System oscillator clock (SOSC, from SCG)
11 Slow internal reference clock (SIRC, from SCG)
7
EN
Watchdog Enable
This write-once bit enables the watchdog counter to start counting.
Table continues on the next page...
Chapter 30 Watchdog timer (WDOG)
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
NXP Semiconductors 711