Counter/Timers; Watchdog Timer; Table 4-3 Sata On-Board Activity Indicator Leds - GE C2K Hardware Reference Manual

SATA on-board activity indicator LEDs
Table 4-3
LED
Illuminated
D10 Activity on SATA1
D11 Activity on SATA2
NOTE: On Rev. 10 and Rev. 20 level boards, D10 indicates activity on either SATA1 or SATA2
and D11 is never on.

4.12 Counter/Timers

The MV64460 System Controller provides sixteen 32-bit general-purpose timers derived from the
FPGA (see "Counter/timers" on page 5-37).

4.12.1 Watchdog Timer

The MV64460 also includes a 32-bit programmable watchdog timer that can reset the processor if
development application software forces the processor into an unstable condition. The watchdog
timer is referenced from the 133MHz TCLK reference. It has a maximum interval duration of
approximately 32 seconds.
The MV64460 watchdog circuitry can output the WDOG_NMI and WDOG_EXP signals
mapped to the MV64460 MPP pins. If the watchdog counter reaches the value programmed in the
Watchdog Value Register NMI_VAL field, the watchdog timer asserts the WDOG_NMI output to
the FPGA, which generates a SMI# to interrupt the processor. If the watchdog timer expires, it
asserts the WDOG_EXP output to the FPGA, which will initiate a board reset as shown in Figure
4-1 on page 4-8.
4-7
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Operation
Functional Blocks
C2K User's Guide