Description Of Registers; Watchdog Control Register (Wcr) - Freescale Semiconductor DSP56374 User Manual

Description of Registers

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Fosc
WCR
10.4 Description of Registers
10.4.1

Watchdog Control Register (WCR)

The Watchdog Control Register is a 16-bit read/write register. It is a write-once register. Once written, it cannot be written again before a
hardware reset except in debug mode. This register has only three used bits and the rest are reserved. The WCR Register is located at
Y:$FFFFC0.
11
23
1. WAIT mode control bit (WTC)
0 = Watchdog timer functions normally in WAIT mode.
1 = Watchdog timer is stopped in WAIT mode.
2. Debug mode control bit (DBGC)
0 = Watchdog timer functions normally in DEBUG mode.
1 = Watchdog timer is stopped in DEBUG mode.
3. Watchdog Enable (WEN)
0 = Watchdog timer is disabled. The TIO1/WDT pin functions as a TIO1 pin.
1 = Watchdog timer is enabled. The TIO1/WDT pin functions as a WDT pin.
10-2
16-bit Counter
EN
WCNTR
DEBUG
WAIT
BIU Data Bus
Figure 10-1. Watchdog Timer Block Diagram
10 9 8 7
22 21 20 19
Reserved bit - read as zero; should be written with zero for future compatibility.
Figure 10-2. WCR Register
DSP56374 Users Guide, Rev. 1.2
Count=0
Load Counter
WSR WMR
6 5 4 3
WTC
18 17 16 15
WDT pin
2 1 0
DBGC WEN
14 13 12
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