r8a66597 Renesas Electronics Corporation., r8a66597 Datasheet - Page 91

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

R8A66597FP/DFP/BG
Remarks
None
2.16.13 Isochronous IN buffer flush bit (IFIS)
2.16.14 Interval error detection spacing bit (IITV)
R e v 1 . 0 1
♦ Pipe timing control register [PIPEPERI]
15-13 Unassigned. Fix to "0".
11-3 Unassigned. Fix to "0".
2-0
Bit
12
15
?
?
IFIS
Isochronous IN buffer flush
IITV
Interval error detection spacing
This is the function in which the controller automatically clears the FIFO buffer when the Peripheral Controller function
is selected, if transfer type isochronous pipe, transfer is IN transfer, and when the controller has not received the
In-token from the USB Host in the (micro) frame for each interval specified in IITV bit. In the double buffer setting (write
"DBLB=1"), the controller clears only the data on one side of the previous buffer. The FIFO buffer is cleared when the
SOF packet is received immediately after the (micro) frame receives the In-token. It is cleared also when the SOF
packet is corruped when the SOF is to be received by an internal interpolation function.
When the Host Controller function is selected, write "0" to this bit. If the selected pipe of other than transfer type
isochronous, write "0" to this bit.
In this bit, specify the interval error detection spacing to frame timing squared. The functional details differ when the
Host Controller function and Peripheral Controller function are selected (to be mentioned later).
Not write to this bit except when "CSSTS=0", "PID=NAK", and when the pipe in the CURPIPE bit is not written. To
modify this bit after chenging the PID bit of the pipe from "BUF" to "NAK", check that "CSSTS=0" and "PBUSY=0", and
then modify the bit. However, when the controller has modified the PID bit to "NAK", it is not necessary to check the
PBUSY bit.
When modifying the bit value, after execute USB communication, write "ACLRM=1" after writing "PID=NAK", and
initialize the interval timer.
This bit does not exist in Pipe3 to Pipe5. Set "0" in the position of the bit corresponding to Pipe3 to Pipe5.
14
?
?
O c t 1 7 , 2 0 0 8
13
?
?
Name
IFIS
12
0
-
p a g e 9 1 o f 1 8 3
11
?
?
Specifies buffer flushed/not-flushed when the transfer
type of pipe specified in PIPESEL bit is isochronous IN.
0: The buffer is not flushed
1: The buffer is flushed
Specifies the transfer interval timing of pipe as second
power frame timing.
10
?
?
9
?
?
8
?
?
Function
7
?
?
6
?
?
5
?
?
4
?
?
Software Hardware Remarks
3
?
?
R/W
R/W
2
0
-
<Address: 6EH>
R
R
IITV
1
0
-
"0" when
(Write to
H)
P
0
0
-