MPC8540 datasheet(1101/1302 Pages) FREESCALE

1101 / 1302 page

Functional Description

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

Freescale Semiconductor

19-23

Dropped frames

Ref:38

Dropped frames that could have been accepted (data

overflow, status overflow and lack of BDs)

Dropped frames due to data overflow

C1:41

Frames dropped because of overflow in the FIFO and

256-byte buffer

Dropped frames due to status overflow

C2:50

Frames dropped because of inability to write status for one

frame and a new frame starts

TSEC1 FIFO Events

Receive FIFO data valid

C1:45

—

Transmit frames without threshold

C7:44

Transmit frames that do not hit Tx FIFO threshold

Receive FIFO above 1/4

Ref:47

—

Receive FIFO above 1/2

Ref:48

—

Receive FIFO above 3/4

Ref:49

—

DMA reads

C1:47

Descriptor and data reads

BD reads

C2:54

TxBD and RxBD reads

RxBD reads

C3:51

RxBD reads (transmit number can be calculated by

subtracting this number from total)

DMA writes

C4:52

Writes (descriptor and data)

BD writes

C5:46

TxBDs and RxBDs closed

RxBD writes

C6:49

RxBDs closed (transmit number can be calculated by

subtracting this number from total)

RxBD read latency

(duration threshold)

Ref:41

Times RxBD read latency exceeds threshold (threshold

event)

Start: request asserted

Stop: data acknowledge received

TxBD read latency

(duration threshold)

Ref:42

Times TxBD read latency exceeds threshold (threshold

event)

Start: request asserted

Stop: data acknowledge received

RxBD write latency

(duration threshold)

Ref:43

Times RxBD write latency exceeds threshold (threshold

event). Only for writes that require a response

Start: request asserted

Stop: end of transaction received

TxBD write latency

(duration threshold)

Ref:44

Times TxBD write response latency exceeds threshold

(threshold event). Only for writes that require a response

Start: request asserted

Stop: end of transaction received

Tx data read latency

(duration threshold)

Ref:45

Times data read response latency exceeds threshold

(threshold event)

Start: request asserted

Stop: data acknowledge received

Table 19-10. Performance Monitor Events (continued)

Event Counted

Number

Description of Event Counted

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