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| 型號(hào)： | MB86965A |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁(yè)數(shù)： | 33/76頁(yè) |
| 文件大?。?/td> | 394K |
| 代理商： | MB86965A |
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MB86965
39
DMA Burst and Transceiver Mode Register (BMPR13)
Table 29. BMPR13 — DMA Burst and Transceiver Mode Register
BIT
SYMBOL
TYPE
DESCRIPTION
7
I / O BASE
UNLOCK
WR1
I/O BASE UNLOCK: When set to 1, enables the I/O Counter for I/O space change.
When the bit is set to 1, an I/O read address X12H increases the I/O space 32 bytes at a
time. The I/O space change is between 260H and 3FFH. When set to 0, this I/O
incremental function is disabled. Any I/O address read as X12H does not change the
selected space.
6
LOWER
SQLCH
THRESH
WR0
LOWER SQUELCH THRESHOLD: When set to 1, reduces twisted-pair squelch
threshold by 4.5 dB. When set to 0, twisted-pair squelch threshold is normal.
5
LINK
TEST EN
WR0
LINK TEST ENABLE: When set to 1, disables transmit and receive link integrity test
functions. When set to 0, enables link integrity test.
4
AUI / TP
WR0
AUI /TP PORT SELECT: When AUTO PORT SELECT bit, BMPR13<3>, is set to 1, the
Manual Port Select mode is in effect. When set to 1, the AUI port is selected. When set
to 0, the TP port is selected.
3
AUTO
PORT SEL
WR0
AUTOMATIC PORT SELECTION: When set to 0, Automatic Port Selection mode is in
effect. EtherCoupler defaults to the AUI port if twisted-pair link integrity fails. When set
to 1, allows manual port selection via AUI/TP bit, BMPR13<4>, which determines the
active port.
2
STP / UTP
WR0
STP / UTP SELECT: When set to 1, selects 150
termination for shielded twisted pair.
When set to 0, selects 100
termination for unshielded twisted pair.
1
0
BURST 1
BURST 0
WR0
BURST CONTROL: Selects the burst length for DMA operation. Each burst is one
word or one byte, depending on System Byte/System Word mode selected,
DLCR6<5>.
BURST 1
BURST 0
Burst Length (Transfers)
0
1
0
1
4
1
0
8
1
12
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相關(guān)代理商/技術(shù)參數(shù) |
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| MB86965B | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:EtherCoupler ETHERNET CONTROLLER WITH 10BASE?T TRANSCEIVER |
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| MB86967PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces |
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