參數(shù)資料
型號(hào): MX98905B
廠商: Electronic Theatre Controls, Inc.
英文描述: The MX98905 is designed for easy implementation of CSMA/CD local area networks,
中文描述: 該MX98905是專為易于實(shí)現(xiàn)的多址/光盤(pán)局域網(wǎng),
文件頁(yè)數(shù): 71/86頁(yè)
文件大?。?/td> 352K
代理商: MX98905B
71
P/N: PM0365
REV. 1.3, NOV 20 ,1995
MX98905B
16. DMA REGISTER
(Continued)
REMOTE BYTE COUNT REGISTERS (RBCR0, 1)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RBCR1
BC15
BC14
BC13
BC12
BC11
BC10
BC9
BC8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RBCR0
BC7
BC6
BC5
BC4
BC3
BC2
BC1
BC0
Note:
RSAR1 programs the start address bits A8-A15
RSAR0 programs the start address bits A0-A7
Address incremented by two for word transfers, and by one
for byte transfers
RBCR1 programs MSB byte count
RBCR0 programs LSB byte count
Byte count decremented by two for word transfers, and by
one for byte transfers
CURRENT REMOTE DMA ADDRESS (CRDA0, 1)
The Current Remote DMA Registers contain the current
address of the Remote DMA. CRDA1/0 are similar to
CLDA1/0 except that CRDA1/0 store the temporary ad-
dress of the Remote DMA. The bit assignment is shown
below:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CRDA1
A15
A14
A13
A12
A11
A10
A9
A8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CRDA0
A7
A6
A5
A4
A3
A2
A1
A0
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