PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 477

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
ERROR
CHANGEI
ERRORI
The delay line error register bit (ERROR) indicates the DLL has run out of dynamic range.
When the DLL attempts to move beyond the end of the delay line, ERROR is set high. When
ERROR is high, the DLL cannot generate a DLLCLK phase which causes the rising edge of
the feedback clock to be aligned to the rising edge of RFCLK. ERROR is set low, when the
DLL captures lock again.
ERROR is forced low when the OVERRIDE register is set high or when the VERN_EN
register is set high.
The delay line tap change event register bit (CHANGEI) indicates the CHANGE register bit
has changed value. When the CHANGE register changes from a logic zero to a logic one, the
CHANGEI register bit is set to logic one.
When WCIMODE is low, the CHANGEI register bit is cleared immediately after it is read,
thus acknowledging the event has been recorded. When WCIMODE is high, the CHANGEI
register bit is cleared immediately after a logic one is written to the CHANGEI register, thus
acknowledging the event has been recorded.
This bit is not used in normal operation.
The delay line error event register bit (ERRORI) indicates the ERROR register bit has gone
high. When the ERROR register changes from a logic zero to a logic one, the ERRORI
register bit is set to logic one. If the ERRORE interrupt enable is high, the INT output is also
asserted when ERRORI asserts.
When WCIMODE is low, the ERRORI register bit is cleared immediately after it is read, thus
acknowledging the event has been recorded. When WCIMODE is high, the ERRORI register
bit is cleared immediately after a logic one is written to the ERRORI register, thus
acknowledging the event has been recorded.
S/UNI-2488 Telecom Standard Product Datasheet
Released
477