SH7058 Datasheet, PDF(643/1130 Page) Renesas Technology Corp – Renesas SuperHTM RISC engine

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SH7058 Datasheet, PDF (643/1130 Pages) Renesas Technology Corp – Renesas SuperHTM RISC engine

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TXPR transmission

cancellation sequence

Set TXCR[N]*1

: Processing by hardware

: Setting by user

Read TXPR (1)*1

Read TXCR (2)*1

Write value of (2)

and (NOT (value of (1))

to TXPR*1

Yes

Transmission of MB[N]

in progress?

No

Set ABACK[N]*2

Transmission of

MB[N] completed

Set TXACK[N]

End of TXPR transmission

cancellation sequence

End of TXPR transmission

cancellation sequence

Notes: 1. This setting must be made when transmission is canceled

regardless of whether the mailbox is transmitting the message

or no message is being transmitted.

2. For a message being transmitted, canceling operation of this

transmission near EOF may also set ABACK in some case, though

TXACK is normally set. (Flag invalid)

In this case, clear ABACK.

Figure 16.10 Transmission Cancellation Sequence

Rev. 3.0, 09/04, page 602 of 1086

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