Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 255
SAM9G20
23.4.2 Receive Counter Register
Name:PERIPH_RCR
Access:Read/Write
RXCTR: Receive Counter Register
RXCTR must be set to receive buffer size.
When a half duplex peripheral is connected to the PDC, RXCTR = TXCTR.
0: Stops peripheral data transfer to the receiver
1–65535 = Starts peripheral data transfer if corresponding channel is active
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RXCTR
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RXCTR