參數(shù)資料
型號(hào): M66291GP
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP48
封裝: LQFP-48
文件頁數(shù): 38/126頁
文件大?。?/td> 810K
代理商: M66291GP
MITSUBISHI <DIGITAL ASSP>
M66291GP
2. Registers
USB -15
Ver.1.0 Apr.9 2001
2.5 Isochronous Status Register
s
Isochronous Status Register (ISOCHRONOUS_STATUS)
<Address : H’0A>
b15
14
13
12
11
10
9876543
21
b0
FMOD
FRNM
0
000000000
000
0
0000000000
000
-
----------
---
<H/W reset : H'0000>
<S/W reset : H'0000>
<USB bus reset : ->
b
Bit name
Function
R
W
15~12
Reserved. Set it to “0”.
?0
11
FMOD
Frame Number Mode
0 :
At SOF receive
1 :
At Isochronous transfer complete
10~0
FRNM
Frame Number
Stores the frame number
×
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”.
(1) FMOD (Frame Number Mode) Bit (b11)
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.
(2) FRNM (Frame Number) Bits (b10~b0)
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”.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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