AT91SAM9G46B-CU 查看數據表（PDF） - Atmel Corporation
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AT91SAM9G46B-CU Datasheet PDF : 1277 Pages
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52.3.7 Serial Synchronous Controller (SSC)
52.3.7.1 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.
52.3.7.2 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
52.3.8 Touchscreen (TSADCC)
52.3.8.1 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.
1258 SAM9G46 Series [DATASHEET]
Atmel-11028G-ATARM-SAM9G46-Datasheet_08-Dec-15
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