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: 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁數(shù): 95/128頁
文件大?。?/td> 928K
代理商: M66291GP
M66291GP/HP
Rev 1.01 2004.11.01 page 67 of 122
2.32 Dn_FIFO Control Registers (n=0~1)
D0_FIFO Control Register (D0_FIFO_CONTROL)
<Address : H’4A>
D1_FIFO Control Register (D1_FIFO_CONTROL)
<Address : H’52>
b15
14
13
12
11
10
9876
54321
b0
TRCLR TREN
IVAL
BCLR
Dreq
DMA_DTLN
0000
100000
0
00000
----
------
----
------
<H/W reset : H'0800>
<S/W reset : ->
<USB bus reset : ->
b
Bit name
Function
R
W
15
TRCLR
Transaction Count Clear
Write
0 :
Invalid (Ignored when written)
1 :
Clears the DMAn_Transaction Count Register
0
14
TREN
Transaction Count Enable
0 :
Disable of transaction count function
1 :
Enable of transaction count function
13
IVAL
IN Buffer Set/OUT Buffer Status
<When set to OUT buffer>
Read
0:
Disables the reading of data from the buffer
1:
Enables the reading of data from the buffer
Write
Invalid (Ignored when written)
<When set to IN buffer>
Read
0 :
Incomplete to write the data to buffer
1 :
Complete to write the data to buffer
Write
0 :
Invalid (Ignored when written)
1 :
Complete to write the data to buffer
(Forced completion : Transmits short packet)
12
BCLR
Buffer Clear
<When set to OUT buffer>
Write
0 :
Invalid (Ignored when written)
1 :
Buffer clear (When the IVAL bit is set to "1")
<When set to IN buffer>
Write
0 :
Invalid (Ignored when written)
1 :
Buffer clear
0
11
Dreq
D_FIFO Ready
0 :
Enables to access Dn_FIFO Data Register
1 :
Disables to access Dn_FIFO Data Register
×
10~0
DMA_DTLN
D_FIFO Receive Data Length Register
Stores the receive data length (byte count)
×
(1) TRCLR (Transaction Count Clear) Bit (b15)
When written to “1”, this bit clears the value of the DMAn_Transaction Count Register.
The writing of “1” to this bit is not retained and is automatically cleared to “0”.
(2) TREN (Transaction Count Enable) Bit (b14)
This bit sets the enable/disable of transaction count function.
Refer to “2.34 DMAn_Transaction Count Registers (n=0~1)”.
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