Delay Rx Clock (DEL_RX_CLK) – Offset 250 - 1.2 - ID:615146 | Intel® 400 Series Chipset On-Package Platform Controller Hub

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Delay Rx Clock (DEL_RX_CLK) – Offset 250

Bit Range	Default	Access	Field Name and Description
30:2	-	-	Reserved
1:0	0h	RW	Delayed Rx Clock Select (RX_CLK_SEL) 00 = The output of the internal (M/N and/or baud rate) clock divider is used as-is to clock in the receive data to the RxFIFO. 01 = An internally delayed version of the internal clock divider output is used to clock in the receive data to the RxFIFO. This allows some additional setup time on the PCH side. 10 = The receive data is clocked on the subsequent negedge of the Tx clock, allowing a full cycle propagation delay on the platform. 11: The receive data is clocked on the subsequent negedge of the delayed Rx clock, maximizing the amount of delay allowed for capturing the receive data. Note: This capability is only supported for default SSP configuration with active high clocks (SSCR1.SPO = 0 and SSCR1.SPH = 0). Other combinations of SPO and SPH setting are not supported for non-zero settings of this field.

Bit Range

Default

Access

Field Name and Description

30:2

Reserved

1:0

Delayed Rx Clock Select (RX_CLK_SEL)

00 = The output of the internal (M/N and/or baud rate) clock divider is used as-is to clock in the receive data to the RxFIFO.

01 = An internally delayed version of the internal clock divider output is used to clock in the receive data to the RxFIFO. This allows some additional setup time on the PCH side.

10 = The receive data is clocked on the subsequent negedge of the Tx clock, allowing a full cycle propagation delay on the platform.

11: The receive data is clocked on the subsequent negedge of the delayed Rx clock, maximizing the amount of delay allowed for capturing the receive data.

Note: This capability is only supported for default SSP configuration with active high clocks (SSCR1.SPO = 0 and SSCR1.SPH = 0). Other combinations of SPO and SPH setting are not supported for non-zero settings of this field.

Capabilities (CAPABLITIES)

Device Idle Control (DEVIDLE_CONTROL) Capabilities (CAPABLITIES)