Specifications

11.2.24 Test 39: Watchdog Test
This BIST checks the watchdog facilities available on the VP 110/01x board. The BIST is
composed of a series of sub-tests. The sub-test number is selected by a BIST parameter; when
run without parameters, a default series of sub-tests is performed.
The available sub-tests are listed below, a (D) against the test indicates that it is executed by
default when no parameters are supplied.
1 - Perform all Default (D) Tests
2 - Watchdog NMI Test (D)
3 - Watchdog Reset Test
Error codes are detailed at the end of this section.
11.2.24.1 Sub-Test 1: Watchdog NMI Test
This sub-tests verifies that in normal operation no NMI (or reset) is generated by the watchdog.
The test also verifies the ability of the watchdog to generate an NMI when its time-out expires.
11.2.24.2 Sub-Test 2: Watchdog Reset Test
This sub-test checks the ability of the watchdog to reset the board when the time-out counter
expires. The test first checks that the watchdog can operate without generating a reset or NMI
while being patted.
NOTE The successful completion of this BIST will result in the board being reset.
Error codes:
0400h - sub-test does not exist
0410h - the watchdog is not hardware enabled
0420h - restarting failed to prevent watchdog time-out
0421h - a spurious interrupt was generated while restarting the watchdog
0422h - no NMI was generated restarting when the watchdog was not restarted
0423h - a spurious interrupt was generated when the watchdog was not restarted
0424h - reset was expected, but an NMI was received
0425h - the board did not reset when the watchdog was not restarted
11-10 VP 110/01x
VSA Mode Diagnostics