Datasheet

SAM7X Series [DATASHEET]

6120K–ATARM–11-Feb-14

31.8.6 SSC Transmit Frame Mode Register

Name: SSC_TFMR

Access Type: Read-write

• DATLEN: Data Length

0: Forbidden value (1-bit data length not supported).

Any other value: The bit stream contains DATLEN + 1 data bits. Moreover, it defines the transfer size performed by the PDC2

assigned to the Transmit. If DATLEN is lower or equal to 7, data transfers are bytes, if DATLEN is between 8 and 15 (included),

half-words are transferred, and for any other value, 32-bit words are transferred.

• DATDEF: Data Default Value

This bit defines the level driven on the TD pin while out of transmission. Note that if the pin is defined as multi-drive by the PIO

Controller, the pin is enabled only if the SCC TD output is 1.

• MSBF: Most Significant Bit First

0: The lowest significant bit of the data register is shifted out first in the bit stream.

1: The most significant bit of the data register is shifted out first in the bit stream.

• DATNB: Data Number per frame

This field defines the number of data words to be transferred after each transfer start, which is equal to (DATNB +1).

• FSLEN: Transmit Frame Sync Length

This field defines the length of the Transmit Frame Sync signal and the number of bits shifted out from the Transmit Sync Data

Pulse length is equal to (FSLEN + 1) Transmit Clock periods, i.e., the pulse length can range from 1 to 16 Transmit Clock periods.

If FSLEN is 0, the Transmit Frame Sync signal is generated during one Transmit Clock period.

31 30 29 28 27 26 25 24

–––––––FSEDGE

23 22 21 20 19 18 17 16

FSDEN FSOS FSLEN

15 14 13 12 11 10 9 8

–––– DATNB

76543210

MSBF – DATDEF DATLEN