參數(shù)資料
型號(hào): TC3299A
廠商: Electronic Theatre Controls, Inc.
英文描述: Ethernet PCMCIA Controller + COMBO Transceiver
中文描述: PCMCIA控制器組合以太網(wǎng)收發(fā)器
文件頁(yè)數(shù): 23/26頁(yè)
文件大小: 1301K
代理商: TC3299A
TC3299A
Preliminary Data Sheet
(I) Local DMA Transmit Registers
Transmit page start register (TPSR):
This register points to the assembled packet to be transmitted. Only the eight higher order addresses are
specified ince all transmit packets are assembled on 256-byte page boundaries.
7
6
5
4
3
2
A15
A14
A13
A12
A11
A10
Transmit byte count register0,1 (TBCR0,TBCR1):
These two registers indicate the length of the packet to be transmitted in bytes. The maximum number of
transmit bytes allowed is 64k bytes. The EPCC will not truncate transmissions longer than 1500 bytes.
7
6
5
4
3
TBCR1
L15
L14
L13
L12
L11
7
6
5
4
3
TBCR0
L7
L6
L5
L4
L3
(II) Local DMA Receive Registers
Page start, stop registers (PSTART, STOP):
The Page Start and Page stop Registers program the starting and stopping page of the Receive Buffer
Ring. Since the EPCC uses fixed 256-byte buffers aligned on page boundaries only the upper eight bits of
the start and stop address are specified.
7
6
5
4
PSTART
PSTOP
Boundary register (BNRY):
This register is used to prevent overflow of the Receive Buffer Ring. Buffer management compares the
contents of this register to the next buffer address when linking buffers together. If the contents of this
register match the next buffer address the local DMA operation is aborted.
7
6
5
4
3
BNRY
A15
A14
A13
A12
A11
(III) Remote DMA registers
Remote Start Address Registers (RSAR0,1):
Remote Byte Count Registers (RBCR0,1):
Remote DMA operations are programmed via the Remote Start Address (RSAR0,1) and Remote Byte
Count (RBCR0,1) registers. The Remote Start Address is used to point to the start of the block of data to
be transferred and the Remote Byte Count is used to indicate the length of the block (in bytes).
7
6
5
4
3
RSAR1
A15
A14
A13
A12
A11
7
6
5
4
3
RSAR0
A7
A6
A5
A4
A3
1
A9
0
A8
2
1
L9
0
L8
L10
2
L2
1
L1
0
L0
3
2
1
A9
0
A8
A15
A14
A13
A12
A11
A10
2
1
A9
0
A8
A10
2
1
A9
0
A8
A10
2
A2
1
A1
0
A0
Confidential.
Copyright
2003, IC Plus Corp.
23/26
August 27, 20003
TC3299A-DS-R30
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