Datasheet

SAM9G20
DS60001516A-page 518  2017 Microchip Technology Inc.
32.8.6 SSC Transmit Frame Mode Register
Name:SSC_TFMR
Access: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 trans-
ferred, 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 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 periods.
31 30 29 28 27 26 25 24
FSLEN_EXT FSLEN_EXT FSLEN_EXT FSLEN_EXT – – – 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