R8A66597BG RENESAS [Renesas Technology Corp], R8A66597BG Datasheet - Page 95

• Manufacturer Part Number: R8A66597BG
• Description: ASSP (USB2.0 2 Port Host/1 Port Peripheral Controller)
• Manufacturer: RENESAS [Renesas Technology Corp]

R8A66597FP/DFP/BG
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(2) When the selected pipe is an isochronous IN transfer pipe
It is used in combination with "IFIS="1". If "IFIS=0", a data packet is sent as a response to the received token,
irrespective of the setup value of the IITV bit.
If "IFIS=1" is written, the controller clears the FIFO buffer when the FIFO buffer does not contain the data that can be
sent, and the In-token is not received in the (micro) frames of each interval set in the IITV bit. It also clears the buffer
when the In-token is not received normally due to bus errors, such as a CRC error. The FIFO buffer is cleared when
the SOF packet is received. Also, when the SOF packet is corrupted, the FIFO buffer is cleared when the SOF
packet is to be received by internal interpolation function.
Conditions to start the interval counting differ according to the setup value of IITV bit (similar for OUT).
The following are the conditions for counting the interval when the Peripheral Controller function is selected:
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(a) When this controller is hardware reset (at this point, the setup value of the IITV bit is also cleared to"0").
(b) When the software writes "ACLRM=1".
(c) When the controller detects a USB reset.
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