R8A66597BG RENESAS [Renesas Technology Corp], R8A66597BG Datasheet - Page 58

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

R8A66597FP/DFP/BG
2.11.13 Port0 EOF error interrupt status bit for the Host Controller function (EOFERR)
2.11.14 Setup transaction error interrupt status bit for the Host Controller function (SIGN)
2.11.15 Setup transaction normal acknowledgement interrupt status bit for the Host Controller function
(SACK)
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When this controller detects that communication for Port0 is not closed at the point of EOF2 timing as defined in the
USB Specification Revision 2.0, it detects the Port0 EOFERR interrupt and sets "1" to this bit. Here, if "1" has been
written to the applicable interrupt permitted bit by the software, this controller asserts the INT_N pin and notifies that
the interrupt is generated.
This controller controls the hardware shown below after detecting the EOFERR interrupt (regardless of the written
value to the applicable interrupt permitted bit). The software closes all communication by the pipe for all applicable
ports. Then, re-enumerate the applicable ports.
(1) Modify the port UACT bit where the EOFERR interrupt has been detected to "0" and set.
(2) Modify the status of the port where the EOFERR interrupt was issued to "idle".
When the Setup transaction is issued by this controller, and is issued three times consecutively, in the state where no
ACK response is received from the Peripheral device, this controller detects the Port0 SIGN interrupt and sets "1" to
this bit. Here, if "1" has been written to the applicable interrupt permitted bit by the software, this controller asserts the
INT_N pin and notifies that the interrupt is generated.
The specific SIGN interrupt detection conditions for this controller when one of the three responses given below are
received for the Setup transaction issued three times consecutively:
(1) When a timeout is detected in the state when the Peripheral device does not respond
(2) When the ACK packet is corrupt
(3) When a handshake (NAK, NYET, or STALL) other than ACK is received
When the Setup transaction is issued by this controller and the ACK response is received from the Peripheral device,
this controller detects the Port0 SACK interrupt and sets "1" to this bit. Here, if "1" has been written to the applicable
interrupt permitted bit by the software, this controller asserts the INT_N pin and notifies that the interrupt is generated.
O c t 1 7 , 2 0 0 8
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