参数资料
型号: M66291GP
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP48
封装: 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件页数: 120/128页
文件大小: 928K
代理商: M66291GP
M66291GP/HP
Rev 1.01 2004.11.01 page 89 of 122
(A-1) DFO RM=00
W rite
DMA_REQ
(A-2) DFO RM=01
W rite
(A-1) D FO R M=00
Read
(A-3) DFO RM=10
W rite
(A-3) D FO R M=10
Read
DMA_ACK
Write
Data
Read
DMA_REQ
D MA_AC K
Input
O utput
(A-2) D FO R M=01
Read
DMA_REQ
DMA_ACK
Data
Input
DMA_REQ
D MA_AC K
Data
The read/write pin is ignored.
The read pin is ignored.
Data
The write pin is ignored.
Output
The read/write pin is ignored.
DMA_REQ
Address
Write
Data
Input
The DMA_ACKn/read pin is ignored.
Valid address
Read
DMA_REQ
O utput
Data
The DMA_ACKn/write pin is ignored.
Valid address
Address
N ote: T his figure indicates the DMA_REQ and D MA_AC K pins at "L" active.
Figure 3.5 Access Timing at Cycle Steal Transfer
(B-1) DFO RM=00 W rite
DMA_REQ
(B-1) D FO R M=00 R ead
D MA_AC K
Write
Data
Input
Output
The read pin is ignored.
Data
The write pin is ignored.
Address
: Valid address
The DMA_ACK/write pin is ignored.
Input
DMA_REQ
D MA_AC K
Read
Output
(B-2) DFO RM=10 W rite
DMA_REQ
(B-2) D FO R M=10 R ead
Write
Data
Output
N ote: T his figure indicates the DMA_REQ and D MA_AC K pins at "L" active.
Data
Input
DMA_REQ
Read
Output
Input
Address
: Valid address
The DMA_ACK/read pin is ignored.
Figure 3.6 Access Timing at Burst Transfer
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