
Architecture Overview
17
SLES073—February 2003
TAS5036B
2.2.4 Error Status Register
The error status register indicates historical information on control signal changes and clock errors. This
register latches these indications when they occur. The indications are cleared by writing a 00(Hex) to the
register.
This register is intended as a diagnostic tool to be used only when the system is not operating correctly. This
is because the error status bits are set when the data rate, serial data interface format, or master/slave mode
is changed. As a result, this register indicates an error condition even though the system is operating normally.
This register should only be used while diagnosing transient error conditions.
Any clock error or control signal terminal change which occurs since the last time the error status register was
cleared is displayed. In using this register, the first step is to initialize the device and verify that all of the clock
signals are active. Then this register should be cleared by writing a 00(Hex). At this point, the register indicates
any errors or control signal changes.
This register indicates an error condition by a high for the following conditions:
FS ERROR
A control terminal change has occurred (M_S, DBLSPD)
LRCLK error
MCLK_IN count error
DCLK phase error with respect to MCLK_IN
MCLK_IN phase error with respect to DCLK
PWM timing error
If all bits of the register are low, no errors have occurred and no control terminals changed.
There is no one-to-one correspondence of clock error indication to a system error condition. A particular
system error can be indicated by one or more error indications in this register. The system error conditions
and the reported errors are as follows:
There is no correct number of MCLKs per LRCLK:
FS error has occurred or
LRCLK error or
MCLK_IN count error
LRCLK is absent:
LRCLK error
MCLK is the wrong frequency, changing frequency, or absent:
DCLK phase error with respect to MCLK
MCLK phase error with respect to DCLK
PWM timing error
SCLK is the wrong frequency or absent
SCLK error