Datasheet

1002
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
44.9.6 SSC Transmit Frame Mode Register
Name: SSC_TFMR
Address: 0xF001001C
Access: Read-write
This register can only be written if the WPEN bit is cleared in “SSC Write Protect Mode Register” .
• DATLEN: Data Length
0 = Forbidden value (1-bit data length not supported).
Any other value: The bit stream contains DATLEN + 1 data bits. .
• 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
Register if FSDEN is 1.
This field is used with FSLEN_EXT to determine the pulse length of the Transmit Frame Sync signal.
Pulse length is equal to FSLEN + (FSLEN_EXT * 16) + 1 Transmit Clock period.
• FSOS: Transmit Frame Sync Output Selection
31 30 29 28 27 26 25 24
FSLEN_EXT – – – FSEDGE
23 22 21 20 19 18 17 16
FSDEN FSOS FSLEN
15 14 13 12 11 10 9 8
––– – DATNB
765 4 3210
MSBF – DATDEF DATLEN
Value Name Description
0 NONE None, TF pin is an input
1NEGATIVE
Negative Pulse, TF pin is an output
2 POSITIVE
Positive Pulse,TF pin is an output