參數(shù)資料
型號(hào)： ICS1889
英文描述： 100Base-FX Integrated PHYceiverTM
中文描述： 100Base - FX光纖綜合PHYceiverTM
文件頁(yè)數(shù)： 7/35頁(yè)
文件大?。?/td> 1096K
代理商： ICS1889
7
ICS1889
Management Interface
The
ICS1889
provides a management interface to connect to
a management entity. The two wire serial interface is part of
the MII and is described in the MII section. The interface
allows the transport of status information from the
ICS1889
to the management entity and the transport of command
words to the
ICS1889
. It includes a register set, a frame
format, and a protocol.
Management Register Set
The register set includes the mandatory basic control and
status registers and an extended set. The
ICS1889
implements
the following registers.
Control
Status
PHY Identifier
PHY Identifier
Extended Control
QuickPoll Status
(register 0)
(register 1)
(register 2)
(register 3)
(register 16)
(register 17)
Management Frame Structure
The management interface uses a serial bit stream with a
specified frame structure and protocol as defined below.
Preamble
SOF
Op Code
Address
Register
TA
Data
Idle
11...11
01
10 (read), 01 (write)
AAAAA
RRRRR
NN
DD...DD
Zo
(32 ones)
(5 bits)
(5 bits)
(2 bits)
(16 bits)
high impedance
Preamble
The
ICS1889
looks for a pattern of 32 logic ones followed by
the SOF delimiter before responding to a transaction.
Start of Frame
Following the preamble a start of frame delimiter of zero-one
initiates a transaction.
Operation Code
The valid codes are 10 for a read operation and 01 for a write
operation. Other codes are ignored.
Address
There may be up to 32 PHYs attached to the MII. This 5 bit
address is compared to the internal address of the
ICS1889
, as
set by the P[0...4]* pins, for a match.
Register Address
The
ICS1889
uses this field to select one of the registers
within the set. If a nonexistent register is specified, the
ICS1889
ignores the command.
TA
This 2-bit field is used by the
ICS1889
to avoid contention
during read transactions. When writing to the
ICS1889
, the
TA bits should be set to 10. When reading from the
ICS1889
,
the device will tristate during this time.
Data
This is a 16-bit field with bit 15 being the first bit sent or
received.
Idle
The
ICS1889
is in the high impedance state during the idle
condition.
Register Access Rules
RO
CW
RW/0
RW
Four types of register access are supported by the device.
Read Only (RO) bits may be read, but writes are ignored.
Command Override Writable (CW) bits may be read, but
writes are ignored unless preceded by writing a logic one to
the Command Register Override bit (16:15). Read Write Zero
(RW/0) bits may be read, but must only be written with a logic
zero value. Writing a logic one to this type of bit may prevent
the device from operating normally. Read Write (RW) bits
may be read and may be written to any value.
Read Only, writes ignored
Command Override Writable
Read/Write only logic zero
Read/Write
Default Values
0
1
Pin
No default value
Default to logic zero
Default to logic one
Default depends on the state of
the named pin
Modifier
SC
LL
LH
Self clearing bits will clear without any further writes after a
specified amount of time. Latching bits are used to capture an
event. To obtain the current status of a latching bit, the bit
must be read twice in succession. If the special condition still
persists, the bit will be the same on the second read;
otherwise, the condition indication will not be present.
Self Clearing
Latching Low
Latching High
相關(guān)PDF資料
PDF描述
ICS1892 10Base-T/100Base-TX Integrated PHYceiver
ICS1892Y 10Base-T/100Base-TX Integrated PHYceiver
ICS1892Y-10 10Base-T/100Base-TX Integrated PHYceiver
ICS1892Y-14 10Base-T/100Base-TX Integrated PHYceiver
ICS1893AF 3.3V 10Base-T/100Base-TX Integrated PHYceiverTM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICS1890 制造商:ICS 制造商全稱:ICS 功能描述:Auto-Negotiation Advertisement Register (register 4 [0x04])
ICS1890Y 制造商:ICS 功能描述: 制造商:ICS 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:ICS 功能描述:1890Y-4 制造商:Integrated Device Technology Inc 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP
ICS1890Y-14 制造商:ICS 制造商全稱:ICS 功能描述:Auto-Negotiation Advertisement Register (register 4 [0x04])
ICS1890Y-4 制造商:ICS 功能描述:1890Y-4
ICS1891 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Transceiver
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