SH7713 datasheet(605/904 Pages) RENESAS

605 / 904 page

Section 16 Serial Communication Interface with FIFO (SCIF)

Rev.1.50 Aug. 30, 2006 Page 565 of 860

REJ09B0288-0150

Read TDFE bit in SCFSR

Read TEND bit in SCFSR

Clear port DR to 0

Clear TE bit in SCSCR to 0

Specify TxD pin as output port

by PFC

Write (16 – transmit trigger

set number) bytes of transmit

data to SCFTDR, read 1

from TDFE bit and TEND flag

in SCFSR, then clear to 0

1. SCIF status check and transmit data write:

Read the serial status register (SCFSR)

and check that the TDFE flag is set to 1,

then write transmit data to SCFTDR, read 1

from the TDFE and TEND flags, then clear

these flags to 0.

The number of data bytes that can be

written is 16 – (transmit trigger set number).

2. Serial transmission continuation procedure:

To continue serial transmission, read 1

from the TDFE flag to confirm that writing is

possible, then write data to SCFTDR, and

then clear the TDFE bit to 0.

3. Break output at the end of serial

transmission:

To output a break in serial transmission,

clear the port data register (DR) to 0 before

clearing the TE bit in SCSCR to 0, and then

specify the TxD pin as an output port by the

PFC.

In steps 1 and 2, it is possible to ascertain

the number of data bytes that can be

written from the number of transmit data

bytes in SCFTDR indicated by the upper 8

bits of SCFDR.

Start of transmission

End of transmission

TDFE = 1?

Yes

All data transmitted?

Yes

TEND = 1?

Yes

Break output?

Yes

Figure 16.4 Sample Serial Transmission Flowchart

SH7713 Datasheet(PDF) 605 Page - Renesas Technology Corp

SH7713 Datasheet(HTML) 605 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