參數(shù)資料
型號: 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): 36/126頁
文件大?。?/td> 810K
代理商: M66291GP
MITSUBISHI <DIGITAL ASSP>
M66291GP
2. Registers
USB -13
Ver.1.0 Apr.9 2001
2.3 Sequence Bit Clear Register
s
Sequence Bit Clear Register (SEQUENCE_BIT)
<Address : H’04>
b15
14
13
12
11
10
9876543
21
b0
SQCLR
0
00
-
--
<H/W reset : H'0000>
<S/W reset : H'0000>
<USB bus reset : ->
b
Bit name
Function
R
W
15~7
Reserved. Set it to “0”.
00
6~0
SQCLR
Sequence Bit Clear
s
Write
0 :
Invalid (Ignored when written)
1 :
Clear Sequence bit
b6 corresponds to EP6, ---b1 corresponds to EP1 and b0
corresponds to EP0.
0
(1) SQCLR (Sequence Bit Clear) Bits (b6~b0)
These bits clear the sequence bit (the bit controlled by H/W) and turns the data PID into DATA 0 PID.
This bit immediately returns to “0” after writing “1”.
In the transfers after the sequence bit is cleared, the sequence bit is toggled through H/W control.
At S/W reset (USBE bit = “1”) and USB bus reset, the sequence bit of each endpoint is not cleared.
Note :
Be sure to set the response PID of the endpoint whose sequence bit is desired to be cleared to NAK (EP0_PID
bits = “00”/EPi_PID bits = “00”) before writing “1” to this bit.
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
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