HD64570 Datasheet, PDF(252/469 Page) Hitachi Semiconductor – Serial Communications Adaptor

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HD64570 Datasheet, PDF (252/469 Pages) Hitachi Semiconductor – Serial Communications Adaptor

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Table 5.23 Interrupts, Interrupt Sources, and Clearing Procedures

Interrupt

Type

TXRDY

interrupt

RXRDY

interrupt

TXINT

interrupt

RXINT

interrupt

Interrupt

Status

Bit

TXRDY

RXRDY

TXINT

RXINT

Enable

Bit

TXRDYE

RXRDYE

TXINTE

RXINTE

Interrupt Source

TX ready

Source Enable

Status Bit Bit

ï£§

ï£§

Clearing

Procedure*1

1

RX ready

ï£§

ï£§

2

(1)Underrun error UDRN

UDRNE 3

(2)Transmitter idle IDL

IDLE

(3)CTS line level

transition

CCTS

CCTSE

(1)SYN pattern

detection/flag

detection

SYNCD/ SYNCDE/ 4

FLGD

FLGDE

(2)DCD line level

transition

CDCD

CDCDE

(3)Break start

detection/abort

detection

BRKD/

ABTD

BRKDE/

ABTDE

(4)Break end

BRKE/

detection/idle start IDLD

detection

BRKEE/

IDLDE

(5)Receive frame end EOM*2

(ST2)

EOME

(6)Parity or MP bit = PMP/

1/short frame

SHRT*2

detection

PMPE/

SHRTE

(7)Parity error/abort

end frame

detection

PE/ABT*2 PEE/ABTE

(8)Framing error

FRME/

detection/residual RBIT*2

bit frame detection

FRMEE/

RBITE

Rev. 0, 07/98, page 236 of 453

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