Motorola M68CPU32BUG Manuel d'utilisateur Page 76

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DIAGNOSTIC FIRMWARE GUIDE
M68CPU32BUG/D REV 1 6-6
CPU CPU Tests For The MCU CPU
6.4 CPU TESTS FOR THE MCU
CPU tests are a series of diagnostics used to test the CPU portion of the BCC MCU, as listed
below (Table 6-1).
Table 6-1. MCU CPU Diagnostic Tests
Monitor Command Title
CPU A Register Test
CPU B Instruction Test
CPU C Address Mode Test
CPU D Exception Processing Test
The normal procedure for correcting a CPU error is to replace the MCU micro-controller unit.
DIAGNOSTIC FIRMWARE GUIDE
M68CPU32BUG/D REV 1 6-7
CPU A Register Test CPU A
6.4.1 Register Test
CPU32Diag>CPU A
CPU A executes a thorough test of all the registers in the MCU device, including checking for
bits stuck high or low.
EXAMPLE
After the command has been issued, the following line is printed:
A CPU Register test..................Running ---------->
If any part of the test fails, then the display appears as follows.
A CPU Register test..................Running ---------->..... FAILED
(error message)
Here, (error message) is one of the following:
Failed DO-D7 register check
Failed SR register check
Failed USP/VBR/CAAR register check
Failed CACR register check
Failed AO-A4 register check
Failed A5-A7 register check
If all parts of the test are completed correctly, then the test passes.
A CPU Register test..................Running ----------> PASSED
Fr
eescale S
emiconduct
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, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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