参数资料
型号: 78Q2123R/F
厂商: Maxim Integrated Products
文件页数: 10/38页
文件大小: 0K
描述: TXRX 10/100 MDIX 3.3V COMM 32QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
类型: PHY 收发器
驱动器/接收器数: 4/4
规程: IEEE 802
电源电压: 3 V ~ 3.6 V
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘
供应商设备封装: 32-QFN 裸露焊盘(5x5)
包装: 标准包装
其它名称: 78Q2123R/FDKR
78Q2123/78Q2133 Data Sheet
DS_21x3_001
18
Rev. 1.6
4.5
A0
R/W
(1)
10BASE-T: If the MR1.11 bit is ‘1’, this bit will be set to ‘1’
upon reset and will be writeable. Otherwise, this bit cannot be
set to ‘1’ by the management.
4.4:0
S4:0
R
01h
Selector Field: Hard coded with the value of ‘00001’ for IEEE
802.3.
Note: Technology Ability Field: MR4.12:5 are the Technology Ability Field bits (A7:0). The default value
of this field is dependent upon the MR1.15:11 register bits. This field can be overwritten by management
to auto-negotiate to an alternate common technology. Writing to this register has no effect until
auto-negotiation is re-initiated.
3.6
MR5: Auto-Negotiation Link Partner Ability Register
Bit
Symbol
Type
Default
Description
5.15
NP
R
0
Next Page: When ‘1’ is read, it indicates the link partner
wishes to engage in Next Page exchange.
5.14
ACK
R
0
Acknowledge: When ‘1’ is read, it indicates the link partner has
successfully received at least 3 consecutive and consistent
FLP bursts.
5.13
RF
R
0
Remote Fault: When ‘1’ is read, it indicates the link partner has
a fault.
5.12:5
A7:0
R
0
Technology Ability Field: This field contains the technology
ability of the link partner. The bit definition is the same as
MR4.12:5.
5.4:0
S4:0
R
00h
Selector Field: This field contains the type of message sent by
the link partner. For an IEEE 802.3 compliant link partner, this
field should be ‘00001’.
3.7
MR6: Auto-Negotiation Expansion Register
Bit
Symbol
Type
Default
Description
6.15:5
RSVD
R
0
Reserved
6.4
PDF
RC
0
Parallel Detection Fault: When ‘1’ is read, it indicates that
more than one technology has been detected during link up.
This bit is cleared when read.
6.3
LPNPA
R
0
Link Partner Next Page Able: When ‘1’ is read, it indicates the
link partner supports the Next Page function.
6.2
NPA
R
0
Next Page Able: Reads ‘0’ since the 78Q2123/78Q2133 do not
support Next Page function.
6.1
PRX
RC
0
Page Received: Reads ‘1’ when a new link code word has
been received into the Auto-Negotiation Link Partner Ability
Register. This bit is cleared upon read.
6.0
LPANEGA
R
0
Link Partner Auto-Negotiation Able: When ‘1’ is read, it
indicates the link partner is able to participate in the Auto-
Negotiation function.
3.8
MR16: Vendor Specific Register
Bit
Symbol
Type
Default
Description
16.15
RPTR
R/W
(0)
Repeater Mode: When set, the 78Q2123/78Q2133 are put
into Repeater mode of operation. In this mode, full duplex is
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