r8a66597 Renesas Electronics Corporation., r8a66597 Datasheet - Page 66

• Manufacturer Part Number: r8a66597
• Description: Assp Usb2.0 2 Port Host/1 Port Peripheral Controller
• Manufacturer: Renesas Electronics Corporation.

R8A66597FP/DFP/BG
2.11.22.3 Peripheral Controller function selection
R e v 1 . 0 1
(1) When the pipe is transmitting:
(2) When the pipe is receiving:
O c t 1 7 , 2 0 0 8
(a) When an IN Token is received while there is no transmission data in the FIFO buffer and the
(a) When the corresponding PIPE PID bit is set to “BUF” (“01”) and an OUT Token is received while there
(b) When the corresponding PIPE PID bit is set to “BUF” (“01”) and a PING token is received while there is
(c) In an Isochronous transfer PIPE, when the PID bit is set to “BUF” (“01”) and data is not received
corresponding PIPE PID bit is set to “BUF” (“01”):
While receiving the In-token, the controller issues an NRDY interrupt and sets "1" to the PIPENRDY bit.
If the interrupt pipe transfer type is isochronous, the controller sends a zero-length packet and sets "1"
to the OVRN bit.
is no open space in the FIFO buffer:
If an interrupt pipe transfer type is isochronous, when the Out-token is received, the controller issues a
NRDY interrupt, sets "1" to the PIPENRDY bit and sets "1" to the OVRN bit. If the interrupt pipe transfer
type is not isochronous, the controller issues a NRDY interrupt request while sending a NAK handshake
after receiving the data in continuation with an Out-token, and sets "1" to the PIPENRDY bit. However,
while resending (when DATA-PID mismatch occurs), a NRDY interrupt request is not issued. If there is
a data packet error, the request is not issued.
no open space in the FIFO buffer:
bit.
successfully within the interval frame:
timing.
While receiving the PING-token, the controller issues NRDY interrupt and sets "1" to the PIPENRDY
The controller issues NRDY interrupt request and sets "1" to the PIPENRDY bit in the SOF reception
p a g e 6 6 o f 1 8 3