SH7713 datasheet(621/904 Pages) RENESAS

621 / 904 page

Section 16 Serial Communication Interface with FIFO (SCIF)

Rev.1.50 Aug. 30, 2006 Page 581 of 860

REJ09B0288-0150

Yes

Start transmission and reception

End

Yes

Read RDF flag in SCFSR

Clear TE and RE bits in SCSCR to 0

Read ORER flag in SCLSR

Error handling

Read receive data in SCFRDR and

clear RDF flag in SCFSR to 0

Yes

ORER = 1?

RDF = 1?

All data received?

Yes

TDFE = 1?

Read TDFE flag in SCFSR

Initialization

SCIF initialization: See figure 16.3, Sample

SCIF Initialization Flowchart.

SCIF status check and receive data write:

Read SCFSR, check that the TDFE flag is

set to 1, then write transmit data in SCFTDR

and clear the TDFE flag to 0. Notification that

the TDFE flag has changed from 0 to 1 can

also be given by the TXI.

Receive error handling: If a receive error occurs,

read the ORER flag in SCLSR, then after

executing the necessary error handling, clear

the ORER flag to 0. Serial reception cannot be

continued while the ORER flag is set to 1.

SCIF status check and receive data read:

Read SCFSR, check that the RDF flag is set

to 1, then read receive data from SCFRDR

and clear the RDF flag to 0. Notification that

the RDF flag has changed from 0 to 1 can also

be given by the RXI.

Serial transmission/reception continuation

procedure: To continue serial reception, before

the MSB of the current frame is received, read

the RDF flag and SCFRDR and clear the RDF

flag to 0. Also, check that the TDFE flag is set

to 1 and data can be written before transmitting

the MSB of the current frame. Futhermore, write

data in SCFTDR and clear the TDFE flag to 0.

Note: When switching from transmission or reception

to simultaneous transmission and reception,

clear the TE and RE bits to 0, then set the both

bits to 1 simultaneously.

Write transmit data in SCFTDR and

read TDFE flag in SCFSR

Figure 16.18 Sample Serial Data Transmission/Reception Flowchart

SH7713 Datasheet(PDF) 621 Page - Renesas Technology Corp

SH7713 Datasheet(HTML) 621 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL