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AC104X-DS00-R 数据表(PDF) 25 Page - Broadcom Corporation.

部件名 AC104X-DS00-R
功能描述  2.5V 4-Port 10/100-TX Ethernet Transceiver
PDF  50 Pages
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制造商  BOARDCOM [Broadcom Corporation.]
网页  http://www.broadcom.com
标志 BOARDCOM - Broadcom Corporation.

AC104X-DS00-R 数据表(HTML) 25 Page - Broadcom Corporation.

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Preliminary Data Sheet
■ AC104X
12/11/01
B roa dcom Co rpo rat ion
Document
AC104X-DS00-405-R
Section 3: Register Descriptions
Page 17
Table 11:
Registers 8-31
Register
Description
Default
8-15
Reserved
XXXX
16
BT and Interrupt Level Control Register
1000
17
Interrupt Control/Status Register
0000
18,19
Reserved
XXXX
20
Cable measurement Capability Register
XXXX
21
Receive Error Counter Register
0000
22-31
Reserved
XXXX
Table 12:
Register 0: Control
Bit
Name
Description
Mode
Default
0.15
Reset
1 = PHY reset.
This bit is self-clearing.
RW/SC
0
0.14
Loopback
1 = Enable loopback mode. This loopbacks the TXD to RXD and
ignores all the activity on the cable media.
0 = Normal operation.
RW
0
0.13
Speed
Select
1 = 100 Mbps 0 = 10 Mbps.
AutoNeg enabled: This bit is writable but will be ignored.
RW
Set by
FORC100 pin
0.12
ANeg
Enable
1 = Enable Auto-Negotiate process (overrides 0.13 and 0.8)
0 = Disable Auto-Negotiate process. Mode selection is controlled
via bit 0.8, 0.13 or through the mode pins.
RW
Set by
ANEGA
0.11
Power
Down
1 = Power down. All blocks except for SMI turns off. Setting
PWRDN pin to high achieves the same result.
0 = Normal operation.
RW
0
0.10
Isolate
1 = Electrically isolate the PHY from MII. PHY is still able to
response to SMI.
0 = Normal operation.
RW
0.9
Restart
ANeg
1 = Restart Auto-Negotiation process.
0 = Normal operation.
RW/SC
0
0.8
Duplex
Mode
1 = Full-duplex.
0 = Half-duplex.
AutoNeg enabled: This bit is writable but will be ignored.
The default value is 0 if auto-negotiation is enabled via pin ANEGA.
RW
Set by DPLX
and ANEGA
pin
0.7
Collision
Test
1 = Enable collision test, which issues the COL signal in response
to the assertion of TX_EN signal. Collision test is disabled if PCSBP
pin is high. Collision test is enabled regardless of the duplex mode.
0 = Disable COL test.
RW
0
0.[6:0]
Reserved
RW
0000000



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