Datasheet

Table 44-2. 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 256 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
Figure 44-16. Transmit and Receive Frame Format in Edge/Pulse Start Modes
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_RHRTo SSC_RSHR
TD
(If FSDEN = 0)
TD
(If FSDEN = 1)
DATNB
PERIOD
From DATDEF
From DATDEF
From DATDEF
From DATDEF
Note: 1. Example of input on falling edge of TF/RF.
In the example illustrated in T
ransmit Frame Format in Continuous Mode (STTDLY = 0), the SSC_THR is loaded
twice. The FSDEN value has no effect on the transmission. SyncData cannot be output in Continuous mode.
Figure 44-17. Transmit Frame Format in Continuous Mode (STTDLY = 0)
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
SAM E70/S70/V70/V71 Family
Synchronous Serial Controller (SSC)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 1123