Information

WDOG memory map (continued)
Absolute
address
(hex)
Register name
Width
(in bits)
Access Reset value
Section/
page
4005_200E Watchdog Unlock Register (WDOG_UNLOCK) 16 R/W D928h
23.7.8/
516
4005_2010 Watchdog Timer Output Register High (WDOG_TMROUTH) 16 R/W 0000h
23.7.9/
517
4005_2012 Watchdog Timer Output Register Low (WDOG_TMROUTL) 16 R/W 0000h
23.7.10/
517
4005_2014 Watchdog Reset Count Register (WDOG_RSTCNT) 16 R/W 0000h
23.7.11/
518
4005_2016 Watchdog Prescaler Register (WDOG_PRESC) 16 R/W 0400h
23.7.12/
518
23.7.1 Watchdog Status and Control Register High
(WDOG_STCTRLH)
Address: WDOG_STCTRLH is 4005_2000h base + 0h offset = 4005_2000h
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Read 0
DISTESTWDOG
BYTESEL[1:0]
TESTSEL
TESTWDOG
0
STNDBYEN
WAITEN
STOPEN
DBGEN
ALLOWUPDATE
WINEN
IRQRSTEN
CLKSRC
WDOGEN
Write
Reset
0 0 0 0 0 0 0 1 1 1 0 1 0 0 1 1
WDOG_STCTRLH field descriptions
Field Description
15
Reserved
This read-only field is reserved and always has the value zero.
14
DISTESTWDOG
Allows the WDOG’s functional test mode to be disabled permanently. Once set, it can only be cleared by
a reset. It cannot be unlocked for editing once it is set.
0 WDOG functional test mode is not disabled.
1 WDOG functional test mode is disabled permanently until reset.
13–12
BYTESEL[1:0]
This 2-bit field select the byte to be tested when the watchdog is in the byte test mode.
00 Byte 0 selected
01 Byte 1 selected
10 Byte 2 selected
11 Byte 3 selected
11
TESTSEL
Selects the test to be run on the watchdog timer. Effective only if TESTWDOG is set.
Table continues on the next page...
Memory Map and Register Definition
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
512 Freescale Semiconductor, Inc.