Datasheet

1203
SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
49.3.7 Serial Synchronous Controller (SSC)
49.3.7.1 SSC: Data sent without any frame synchro
When SSC is configured with the following conditions:
 RF is in input,
 TD is synchronized on a receive START (any condition: START field = 2 to 7)
 TF toggles at each start of data transfer
 Transmit STTDLY = 0
 Check TD and TF after a receive START,
The data is sent but there is not any toggle of the TF line
Problem Fix/Workaround
Transmit STTDLY must be different from 0.
49.3.7.2 SSC: Unexpected delay on TD output
When SSC is configured with the following conditions:
 TCMR.STTDLY more than 0
 RCMR.START = Start on falling edge/Start on Rising edge/Start on any edge
 RFMR.FSOS = None (input)
 TCMR.START = Receive Start
Unexpected delay of 2 or 3 system clock cycles is added to TD output.
Problem Fix/Workaround
None
49.3.8 Touchscreen (TSADCC)
49.3.8.1 TSADCC: Pen detect accuracy is not good
Depending on LCD panels, the pen detect is noisy, leading to an unpredictable behavior.
Problem Fix/Workaround
An additional resistor solves the problem. Its value (between 100
kΩ and 250 kΩ) is to be tuned for the LCD panel.