Technical data

RTC - MK48Txx Timekeeping Tests

http://www.motorola.com/computer/literature 3-113

ALARM - Alarm Interrupt

Command Input

PPCx-Diag>rtc alarm

Description

This test sets the alarm of the Real Time Clock (RTC) MK48Txx to go off

every second, and verifies that interrupt IRQ8 occurs and the AF (Alarm

Flag) bit of the RTC is set.

Response/Messages

After the command has been issued, the following line is printed:

RTC ALARM: MK48Txx Alarm Interrupt........Running --->

If all parts of the test are completed correctly, then the test passes:

RTC ALARM: MK48Txx Alarm Interrupt...Running ---> PASSED

If any part of the test fails, then the display appears as follows:

RTC ALARM: MK48Txx Alarm Interrupt...Running ---> FAILED

RTC/ALARM Test Failure Data:

(error message)

Here

(error message)

is one of the following:

If the expected interrupt IRQ8 did not occur,

(error message)

is:

Interrupt failed to occur. Int Stat Reg : xx hex

where xx is the contents in hex of the Interrupt Status Register of the PCI-

to_ISA Bridge.

If an interrupt other than IRQ8 occurred,

(error message)

is:

Spurious interrupt occurred instead of IRQ8.

Int Stat Reg : xx hex

If interrupt IRQ8 did occur but the AF (Alarm Flag) was not set,

(error

message)

is:

AF (Alarm Flag) bit was not set