Configuration Transmit Message Interface - 4.4 English

cfg_msg_transmit

Input

1

Configuration Transmit Encoded Message.

This signal is asserted together with cfg_msg_transmit_type, which supplies the encoded message type and cfg_msg_transmit_data, which supplies optional data associated with the message, until cfg_msg_transmit_done is asserted in response.

cfg_msg_transmit_type

Input

3

Configuration Transmit Encoded Message Type.

Indicates the type of PCI Express message to be transmitted. Encodings supported are:

000b: Latency Tolerance Reporting (LTR)

001b: Optimized Buffer Flush/Fill (OBFF)

010b: Set Slot Power Limit (SSPL)

011b: Power Management (PM PME)

100b -111b: Reserved

cfg_msg_transmit_data

Input

32

Configuration Transmit Encoded Message Data.

Indicates message data associated with particular message type.

• 000b: LT R - cfg_msg_transmit_data[31] < Snoop Latency Req.,
cfg_msg_transmit_data[28:26] < Snoop Latency Scale, cfg_msg_transmit_data[25:16] < Snoop Latency Value, cfg_msg_transmit_data[15] < No-Snoop Latency Requirement,
cfg_msg_transmit_data[12:10] < No-Snoop Latency Scale,
cfg_msg_transmit_data[9:0] < No-Snoop Latency Value.

• 001b: OBFF - cfg_msg_transmit_data[3:0] < OBFF Code.

• 010b: SSPL - cfg_msg_transmit_data[9:0] < {Slot Power Limit Scale, Slot Power Limit Value}.

• 011b: PM_PME - cfg_msg_transmit_data[1:0] < PF1, PF0; cfg_msg_transmit_data[9:4] < VF5, VF4, VF3, VF2, VF1, VF0, where one or more PFs or VFs can signal PM_PME simultaneously.

• 100b - 111b: Reserved

cfg_msg_transmit_done

Output

1

Configuration Transmit Encoded Message Done.

Asserted in response to cfg_mg_transmit assertion, for 1 cycle after the request is complete.