Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
ID | Date | Version | Classification |
---|---|---|---|
834576 | 10/10/2024 | 001 | Public |
Global Tx Threshold Control (GTXTHRCFG) – Offset c108
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:30 | 0h | RO | Reserved |
29 | 0h | RO | USB Transmit Packet Count Enable (USBTxPktCntSel) This fieldenables/disables the USB transmission multi-packet thresholding: |
28 | 0h | RO | Reserved |
27:24 | 0h | RO | USB Transmit Packet Count (USBTxPktCnt) This field specifies thenumber of packets that must be in the TXFIFO before the core can start transmission for the corresponding USB transaction (burst). This field is only valid when the USB Transmit Packet Count Enable field is set to one. Valid values are from 1 to 15 |
23:16 | 0h | RW | USB Maximum Tx Burst Size (USBMaxTxBurstSize) When USBTxPktCntSel is one,this field specifies the Maximum Bulk OUT burst the core should do. When the systembus is slower than the USB, TX FIFO can underrun during a long burst. User can program a smaller value to this field to limit the TX burst size that the core can do. It only applies to SS Bulk, Isochronous, and Interrupt OUT endpoints in the host mode. |
15:0 | 0h | RO | Reserved |