UPD360 datasheet(134/221 Pages) MICROCHIP

134 / 221 page

UPD360

DS00002084C-page 134

 2016-2017 Microchip Technology Inc.

EN_FWTX

Enable software issued transmission.

This bit is effective only at the moment the GO bit is set by software and is

intended to cover race conditions where it is not possible for software to back

off from setting the GO bit in response to a valid RX.

This bit is automatically held cleared by hardware if the RX Interrupt Status

Reset, or if there is any data in the RX FIFO and, thus, software must set it

prior to each transmission it wants to issue.

When this bit is cleared, a software issued transmission will be aborted.

Note:

This is not an Abort bit. Clearing this bit will have no effect on a

transmission that has already been issued to hardware. Such

transmissions will be aborted automatically by hardware as appro-

priate. To abort a transmission in progress, use the ABORT bit in

the TX Control Register B (TX_CTL_B).

Note:

Setting of this bit does not prevent hardware issued transmissions.

Note:

This bit is reset by assertion of PD_RESET.

R/W

2:0

MSG_ID

Message ID. This value is used to verify the expected message ID in the

GoodCRC response.

Note:

Hardware will not insert this value into the TX message header. For

proper normal operation, software must program the same value in

bits[11:9] of message header.

Note:

Software must set this to zero when it processes a Hard Reset,

Cable Reset or Soft Reset.

R/W

000b

Bits

Description

Type

Default

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