Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Scheda Tecnica
Codici prodotto
ATSAM4S-XPLD
569
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
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.
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.
Figure 31-13.Transmit and Receive Frame Format in Edge/Pulse Start Modes
Note:
1. Example of input on falling edge of TF/RF.
Figure 31-14.Transmit Frame Format in Continuous Mode
Table 31-4. Data Frame Registers
Transmitter
Receiver
Field
Length
Comment
SSC_TFMR
SSC_RFMR
DATLEN
Up to 32
Size of word
SSC_TFMR
SSC_RFMR
DATNB
Up to 16
Number of words transmitted in frame
SSC_TFMR
SSC_RFMR
MSBF
Most significant bit first
SSC_TFMR
SSC_RFMR
FSLEN
Up to 16
Size of Synchro data register
SSC_TFMR
DATDEF
0 or 1
Data default value ended
SSC_TFMR
FSDEN
Enable send SSC_TSHR
SSC_TCMR
SSC_RCMR
PERIOD
Up to 512
Frame size
SSC_TCMR
SSC_RCMR
STTDLY
Up to 255
Size of transmit start delay
Sync Data
Default
STTDLY
Sync Data
Ignored
RD
Default
Data
DATLEN
Data
Data
Data
DATLEN
Data
Data
Default
Default
Ignored
Sync Data
Sync Data
FSLEN
TF/RF
(1)
Start
Start
From SSC_TSHR
From SSC_THR
From SSC_THR
From SSC_THR
From SSC_THR
To SSC_RHR
To SSC_RHR
To SSC_RSHR
TD
(If FSDEN = 0)
TD
(If FSDEN = 1)
DATNB
PERIOD
FromDATDEF
FromDATDEF
From DATDEF
From DATDEF
DATLEN
Data
DATLEN
Data
Default
Start
From SSC_THR
From SSC_THR
TD
Start: 1. TXEMPTY set to 1
2. Write into the SSC_THR