UPD360 datasheet(154/221 Pages) MICROCHIP

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UPD360

DS00002084C-page 154

 2016-2017 Microchip Technology Inc.

11.4.3.2

TX Interrupt Status Register (TX_IRQ_STAT)

This register reflects the status of various TX_IRQ_STAT sources. Whether an interrupt is generated or not depends on

the values in the TX Interrupt Enable Register (TX_IRQ_EN).

Bits in this register are set by hardware and must be cleared by software.

Address:

1A81h

Size:

8 bits

Bits

Description

Type

Default

AUTO_RSP_ABORTED

A TX auto-response message was aborted. Reason for why the TX was

aborted may be determined by reading the TX Auto-Response Abort Status

R/W1C

AUTO_RSP_SENT

Hardware has sent an auto-response. This bit is set when hardware is fin-

ished sending an auto-response.

R/W1C

OK_TO_TX

It is now OK to transmit. This bit is set when OK_TO_TX bit in TX Control

ware to initiate transmission.

R/W1C

CRC_RCV_TIMEOUT

CRC Receive Timer expired. This is a TX failure. This interrupt should be

enabled only when Automatic Retry Mode is disabled.

The EN_CRC_RCV_TMR bit in the RX Control Register A (RX_CTL_A) must

be set to enable the timer for use by software.

Note:

CRC Receive Timer is also used in BIST Mode to time reception of

BIST Error Count message.

R/W1C

TX_EOP

Hardware is done sending a packet. Note this does not mean that a valid EOP

framing symbol was sent. It only means that packet transmission ended, i.e.,

transmitter was turned off.

This bit set after each TX attempt.

This can be used to signal when a Hard or Cable Reset is finished transmis-

sion since it does not have a GoodCRC response so the TX_DONE bit will not

be set - or if Auto Retry Mode is disabled in which case the hardware is done

when the transmitter turns off.

This bit is used by software to trigger internal timers. Software must be care-

fully when it enables/disables this interrupt because this bit is set after each

TX completion.

R/W1C

TX_ABORTED

A TX message was aborted. Reason for why the TX was aborted may be

determined by reading the TX Abort Status Register (TX_ABORT_STAT).

R/W1C

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