SAM7S256_14 Datasheet, PDF (418/775 Pages) ATMEL Corporation – ARM-based Flash MCU

compares at each new sample the last bits received at the Compare 0 pattern contained in the Compare 0 Register
(SSC_RC0R). When this start event is selected, the user can program the Receiver to start a new data transfer
either by writing a new Compare 0, or by receiving continuously until Compare 1 occurs. This selection is done with
the bit (STOP) in SSC_RCMR.
32.6.7 Data Format
The data framing format of both the transmitter and the receiver are programmable through the Transmitter Frame
Mode Register (SSC_TFMR) and the Receiver Frame Mode Register (SSC_RFMR). In either case, the user can
independently select:
• the event that starts the data transfer (START)
• the delay in number of bit periods between the start event and the first data bit (STTDLY)
• the length of the data (DATLEN)
• the number of data to be transferred for each start event (DATNB).
• the length of synchronization transferred for each start event (FSLEN)
• the bit sense: most or lowest significant bit first (MSBF)
Additionally, the transmitter can be used to transfer synchronization and select the level driven on the TD pin while
not in data transfer operation. This is done respectively by the Frame Sync Data Enable (FSDEN) and by the Data
Default Value (DATDEF) bits in SSC_TFMR.
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
418