11.2.25 Test 40: LDT and PIT Test
This BIST checks the operation of the LDT (Long Duration Timer) and the PIT (Periodic Interrupt
Timer) facilities available on the VP 110/01x board. This BIST is composed of a series of
sub-tests. The sub-test number is selected by a BIST parameter; when run without parameters,
all sub-tests are 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.
0 - Perform all default (D) tests
1 - Standard LDT / PIT Functional Test (D)
2 - Enhanced LDT / PIT Functional Test (D)
Error codes are detailed at the end of this section.
11.2.26 Sub-Test 1: Standard LDT / PIT Functional Test
This sub-test checks the operation of the LDT and all the frequencies of the PIT. The LDT’s
holding register is set to an appropriate value and the LDT is started. The sub-test checks that a
“roll-over” is generated within an appropriate time. This sub-test is then repeated for all the
frequencies of the PIT.
11.2.27 Sub-Test 2: Enhanced LDT / PIT Functional Test
This sub-test checks the operation of the LDT and all the frequencies of the PIT. The LDT’s
holding register is set to an appropriate value and the LDT is started. The sub-test checks that a
“roll-over” is generated causing an interrupt within an appropriate time. This sub-test is then
repeated for all the frequencies of the PIT.
Error codes:
0400h - sub-test does not exist
0410h - LDT failed standard test
0411h - PIT failed standard test when programmed frequency = 100Hz
0412h - PIT failed standard test when programmed frequency = 200Hz
0413h - PIT failed standard test when programmed frequency = 500Hz
0414h - PIT failed standard test when programmed frequency = 1kHz
0415h - PIT failed standard test when programmed frequency = 2kHz
0416h - PIT failed standard test when programmed frequency = 5kHz
0417h - PIT failed standard test when programmed frequency = 10kHz
0420h - LDT failed enhanced test
0421h - PIT failed enhanced test when programmed frequency = 100Hz
0422h - PIT failed enhanced test when programmed frequency = 200Hz
0423h - PIT failed enhanced test when programmed frequency = 500Hz
0424h - PIT failed enhanced test when programmed frequency = 1kHz
0425h - PIT failed enhanced test when programmed frequency = 2kHz
0426h - PIT failed enhanced test when programmed frequency = 5kHz
0427h - PIT failed enhanced test when programmed frequency = 10kHz
VP 110/01x
11-11
VSA Mode Diagnostics
Summary of Contents for VP 110/01 Series
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