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参数资料
型号： KSZ8721CL TR
厂商： Micrel Inc
文件页数： 10/32页
文件大小： 0K
描述： TXRX 10/100 3.3V 48-LQFP
标准包装： 1,000
类型： 收发器
驱动器/接收器数： 1/1
规程： MII
电源电压： 3 V ~ 3.6 V
安装类型： 表面贴装
封装/外壳： 48-LQFP
供应商设备封装： 48-LQFP（7x7）
包装： 带卷 (TR)
其它名称： KSZ8721CLTR
KSZ8721CLTR-ND
KS8721CL
Micrel
M9999-100804
18
October 2004
Address
Name
Description
Mode(1)
Default
Register 0h - Basic Control
0.15
Reset
1 = software reset. Bit is self-clearing.
RW/SC
0
0.14
Loop-Back
1 = loop-back mode; 0 = normal operation.
RW
0
0.13
Speed Select (LSB)
1 = 100Mbps; 0 = 10Mbps.
RW
Set by
Ignored if Auto-Negotiation is enabled (0.12 = 1).
SPD100
0.12
Auto-Negotiation Enable
1 = enable auto-negotiation process (override 0.13 and 0.8).
RW
Set by
0 = disable auto-negotiation process.
NWAYEN
0.11
Power Down
1 = power-down mode; 0 = normal operation.
RW
0
0.10
Isolate
1 = electrical isolation of PHY from MII and TX+/TX-.
RW
Set by ISO
0 = normal operation.
0.9
Restart Auto-Negotiation
1 = restart auto-negotiation process.
RW/SC
0
0 = normal operation. Bit is self-clearing.
0.8
Duplex Mode
1 = full-duplex; 0 = half-duplex.
RW
Set by
DUPLEX
0.7
Collision Test
1 = enable COL test; 0 = disable COL test.
RW
0
0.6:1
Reserved
RO
0
0.0
Disable
0 = enable transmitter.
R/W
0
Transmitter
1 = disable transmitter.
Register 1h - Basic Status
1.15
100BASE-T4
1 = T4 capable; 0 = not T4 capable.
RO
0
1.14
100BASE-TX Full-Duplex
1 = capable of 100BASE-X full-duplex.
RO
1
0 = not capable of 100BASE-X full-duplex.
1.13
100BASE-TX Half-Duplex
1 = capable of 100BASE-X half-duplex.
RO
1
0 = not capable of 100BASE-X half-duplex.
1.12
10BASE-T Full-Duplex
1 = 10Mbps with full-duplex.
RO
1
0 = no 10Mbps with full-duplex capability.
1.11
10BASE-T Half-Duplex
1 = 10Mbps with half-duplex.
RO
1
0 = no 10Mbps with half-duplex capability.
Note:
1. RW: Read/Write, RO: Read Only, SC: Self Clear, LH: Latch High, LL: Latch Low. Some of the default values are set by strap-in. See “Strapping
Options.”
Register Map
Register No.
Description
0h
Basic Control Register
1h
Basic Status Register
2h
PHY Identifier I
3h
PHY Identifier II
4h
Auto-Negotiation Advertisement Register
5h
Auto-Negotiation Link Partner Ability Register
6h
Auto-Negotiation Expansion Register
7h
Auto-Negotiation Next Page Register
8h
Link Partner Next Page Ability
15h
RXER Counter Register
1bh
Interrupt Control/Status Register
1fh
100BASE-TX PHY Control Register
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