MPC8540 datasheet(1022/1302 Pages) FREESCALE

1022 / 1302 page

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

17-98

Freescale Semiconductor

RapidIO Interface

Relatively few nonrecoverable errors occur at the physical layer. Behavior of the interface is not

defined for these events. Table 17-92 lists nonrecoverable errors at the physical layer.

17.5.2 Common Transport Layer Functionality Lists

The common transport layer functionality is subdivided into individual lists.

Table 17-93 lists the basic functionality for the device at the common transport layer and the

compliance of the RapidIO controller.

Device encounters an acknowledge control symbol time-out

10A. ACTION: Moves from the port OK state to the output error-stopped state

10B. ACTION: Device stops transmitting new packets

10C. ACTION: Device sends link-request/input-status (restart-from-error) control symbol if no

link-request control symbol is already outstanding (must wait for previous one to complete) and

waits for link-response control symbol

10D. ACTION: Moves from the output error-stopped state to the port OK state

10E. ACTION: Starts re-transmitting at the ackID value returned with the received link-response

control symbol

Device encounters any transmission error during error recovery

Table 17-92. General Device 8/16 LP-LVDS Physical Layer Nonrecoverable Errors List

Item No.

Item Functionality

Meets Reqs?

Device does not respond to link-request/send-training control symbol with 256 training patterns

followed by at least one idle control symbol

Late or no response to throttle request

Device is attempting error recovery and ackID received in link-response control symbol does not

make sense (device cannot complete recovery)

Time-out between link-request control symbol and link-response control symbol

Device port transmits packets before device is both sending and receiving idle control symbols

Any transmission error encountered during error recovery

Table 17-91. General Device 8/16 LP-LVDS Physical Layer Recoverable

Errors List (continued)

Item No.

Item Functionality

Meets Reqs?

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