Frame Length Adjustment (FLADJ) – Offset 61 - 001 - ID:795262 | Intel® Core™ Ultra Processors for H-series and U-series Platforms IOE-P I/O Registers

Bit Range	Default	Access	Field Name and Description
7	0h	RO	Reserved
6	1h	RO	No Frame Length Timing Capability (NO_FRAME_LENGTH_TIMING_CAP) This flag is set to 1 to indicate that the host controller does not support a programmable Frame Length Timing Value field.
5:0	20h	RO	Frame Length Timing Value (FLTV) SOF micro-frame length) is equal to 59488 + value in this field. The default value is decimal 32 (20h), which gives a SOF cycle time of 60000. Frame Length (number of High Speed bit times) FLADJ Value (decimal) (decimal) 59488 0 (00h) 59504 1 (01h) 59520 2 (02h) ... 59984 31 (1Fh) 60000 32 (20h) ... 60480 62 (3Eh) 60496 63 (3Fh) Each decimal value change to this register corresponds to 16 high-speed bit times. The SOF cycle time (number of SOF counter clock periods to generate a SOF micro-frame length) is equal to 59488 + value in this field. The default value is decimal 32 (20h), which gives a SOF cycle time of 60000. Frame Length (# High Speed bit times) FLADJ Value

Bit Range

Default

Access

Field Name and Description

Reserved

No Frame Length Timing Capability (NO_FRAME_LENGTH_TIMING_CAP)

This flag is set to 1 to indicate that the host controller does not support a programmable Frame Length Timing Value field.

5:0

20h

Frame Length Timing Value (FLTV)

SOF micro-frame length) is equal to 59488 + value in this field. The default value is decimal 32 (20h), which gives a SOF cycle time of 60000.
Frame Length
(number of High Speed bit times) FLADJ Value
(decimal) (decimal)
59488 0 (00h)
59504 1 (01h)
59520 2 (02h)
...
59984 31 (1Fh)
60000 32 (20h)
...
60480 62 (3Eh)
60496 63 (3Fh)
Each decimal value change to this register corresponds to 16 high-speed bit times. The SOF cycle time (number of SOF counter clock periods to generate a SOF micro-frame length) is equal to 59488 + value in this field. The default value is decimal 32 (20h), which gives a SOF cycle time of 60000. Frame Length (# High Speed bit times) FLADJ Value

Best Effort Service Latency (BESL)

Serial Bus Release Number (SBRN) Best Effort Service Latency (BESL)