m66291 Renesas Electronics Corporation., m66291 Datasheet - Page 17

• Manufacturer Part Number: m66291
• Description: Assp Usb2.0 Device Controller
• Manufacturer: Renesas Electronics Corporation.

M 6 6 2 9 1 G P / H P
2.5 Isochronous Status Register
R e v 1 . 0 1
(1) FMOD (Frame Number Mode) Bit (b11)
(2) FRNM (Frame Number) Bits (b10~b0)
15~12
b15
10~0
Isochronous Status Register (ISOCHRONOUS_STATUS)
11
0
0
-
b
This register is valid only for isochronous transfer. In other words, the register is valid status for the endpoint
that is set EPi_TYP bits to “11”.
This bit sets the storage timing of the frame number to be stored to the FRNM bits.
When this bit is set to “0”, when the SOF packet is properly received, the frame number of the received SOF
packet gets stored.
When this bit is set to “1”, when the isochronous packet transfer completes, the frame number of the properly
received SOF packet gets stored.
The frame number is stored in the FRNM with the timing set by the FMOD bit of this register. Here, the
SOFR bit is set to “1”.
2 0 0 4 . 1 1 . 0 1
Reserved. Set it to “0”.
FMOD
Frame Number Mode
FRNM
Frame Number
14
0
0
-
13
0
0
-
p a g e 1 7 o f 1 2 2
12
0
0
-
Bit name
FMOD
11
0
0
-
10
0
0
-
9
0
0
-
0 :
1 :
Stores the frame number
8
0
0
-
At SOF receive
At Isochronous transfer complete
7
0
0
-
6
0
0
-
FRNM
Function
5
0
0
-
4
0
0
-
3
0
0
-
2
0
0
-
<H/W reset : H'0000>
<S/W reset : H'0000>
<Address : H’0A>
<USB bus reset : ->
1
0
0
-
R
?
b0
0
0
-
W
0
×