MEC1404 Datasheet, PDF (196/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
There are three methods of reloading the WDT: a write to the WDT Load Register, a write to the WDT Kick Register, or
WDT event.
11.7.1.4 WDT Interval
The WDT Interval is the time it takes for the WDT to decrements from the WDT Load Register value to 0000h. The WDT
Count Register value takes 33/5Hz_Clk seconds (ex. 33/32.768 KHz = 1.007ms) to decrement by 1 count.
11.8 EC-Only Registers
The registers listed in the EC-Only Register Summary table are for a single instance of the Watchdog Timer (WDT). The
addresses of each register listed in this table are defined as a relative offset to the host “Base Address” defined in the
EC-Only Register Base Address Table.
TABLE 11-3: EC-ONLY REGISTER BASE ADDRESS TABLE
Block Instance
WDT
Instance
Number
0
Host
EC
Address Space
32-bit internal
address space
Base Address
0000_0400h
The Base Address indicates where the first register can be accessed in a particular address space for a block instance.
TABLE 11-4: EC-ONLY REGISTER SUMMARY
Offset
00h
04h
08h
0Ch
Register Name (Mnemonic)
WDT Load Register
WDT Control Register
WDT Kick Register
WDT Count Register
11.8.1 WDT LOAD REGISTER
Offset ^00h
Bits
Description
15:0 WDT Load
Writing this field reloads the Watch Dog Timer counter.
Type
R/W
Default
Fh
Reset
Event
nSYSR
ST
DS00001956D-page 196
 2015 - 2016 Microchip Technology Inc.