R8A66597BG RENESAS [Renesas Technology Corp], R8A66597BG Datasheet - Page 29

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

R8A66597FP/DFP/BG
2.5.7
2.5.8
2.5.9
2.5.9.1
R e v 1 . 0 1
Port0 resume signal output bit for the Host Controller function (RESUME)
If "1" is written to this bit while selecting the Host Controller function, the controller drives Port0 to the K-State and
executes resume output. The controller sets this bit to “1” when “RWUPE=1” and the remote wakeup signal is detected
in the USB suspend status. The controller continues with the K-State output when "RESUME=1" (until the software
writes "RESUME=0"). While "RESUME=1" (resume time), write the time based on the USB Specification Revision 2.0.
Write "1" to this bit during the suspend process. Write "1" to the UACT bit and USB bus reset termination (write
"USBRST=0") simultaneously.
Port0 USB bus operations enabled bit for the Host Controller function (UACT)
If "1" is written to this bit while selecting the Host Controller function, the controller changes the status of Port0 to USB
bus enabled status, outputs SOF, and sends/receives the data. Once the software writes "UACT=1", SOF output starts
within one (micro) frame time.
When the software writes "1" to this bit", the controller transfers to idle status after the (micro) SOF output.
The controller write "1" to this bit in the following cases:
(1) When the DTCH interrupt is detected during communication (if writing "UACT=1")
(2) When the EOFERR interrupt is detected during communication (if writing "UACT=1")
Write "1" to this bit while terminating the USB reset process (write "USBRST=0") or while terminating the suspension
process (write "RESUME=0").
Port0 reset handshake status bit (RHST)
The controller sets the result of the Port0 reset handshake in this bit. The results of reset handshake are listed in Table
2.10.
Selecting the Host Controller function
While selecting the Host Controller function, the bit sets "100" when the software writes "USBRST=1". When
"HSE=1" is selected for the port, the bit setss "111" when the controller detects a Chirp K from the Peripheral device.
The controller writes the RHST bit value when the software writes "USBRST=0" to the port, and when the controller
terminates the SE0 drive.
When the software writes "UTST=1xxx" (when parameters are written for a host test), the bit sets "011".
O c t 1 7 , 2 0 0 8
When powered or during disconnect
During reset handshake
When connecting to Low-Speed
When connecting to Full-Speed
When connecting to Hi-Speed
p a g e 2 9 o f 1 8 3
Bus Status
Table 2.10 USB Data Bus Line Status
Peripheral Controller
While selecting the
function
RHST
000
100
010
011
-
Host Controller function
While selecting the
Bit Value
000
1xx
001
010
011