KSZ9031RNX

KSZ9031RNX
Gigabit Ethernet Transceiver
with RGMII Support
Revision 2.2
General Description
Features
The KSZ9031RNX is a completely integrated triple-speed
(10Base-T/100Base-TX/1000Base-T) Ethernet physicallayer transceiver for transmission and reception of data on
standard CAT-5 unshielded twisted pair (UTP) cable.
• Single-chip 10/100/1000Mbps IEEE 802.3-compliant
Ethernet transceiver
• RGMII timing supports on-chip delay according to
RGMII Version 2.0, with programming options for
external delay and making adjustments and corrections
to TX and RX timing paths
• RGMII with 3.3V/2.5V/1.8V tolerant I/Os
• Auto-negotiation to automatically select the highest linkup speed (10/100/1000Mbps) and duplex (half/full)
• On-chip termination resistors for the differential pairs
• On-chip LDO controller to support single 3.3V supply
operation – requires only one external FET to generate
1.2V for the core
• Jumbo frame support up to 16KB
• 125MHz reference clock output
• Energy detect power-down mode for reduced power
consumption when the cable is not attached
• Energy Efficient Ethernet (EEE) support with low-power
idle (LPI) mode and clock stoppage for 100Base-TX/
1000Base-T and transmit amplitude reduction with
10Base-Te option
• Wake-On-LAN (WOL) support with robust custompacket detection
• AEC-Q100 qualified for automotive applications
(KSZ9031RNXUA, KSZ9031RNXVA)
The KSZ9031RNX provides the reduced gigabit media
independent interface (RGMII) for direct connection to
RGMII MACs in gigabit Ethernet processors and switches
for data transfer at 10/100/1000Mbps.
The KSZ9031RNX reduces board cost and simplifies
board layout by using on-chip termination resistors for the
four differential pairs and by integrating an LDO controller
to drive a low-cost MOSFET to supply the 1.2V core.
The KSZ9031RNX offers diagnostic features to facilitate
system bring-up and debugging in production testing and
in product deployment. Parametric NAND tree support
enables fault detection between KSZ9031 I/Os and the
®
board. The LinkMD TDR-based cable diagnostic identifies
faulty copper cabling. Remote and local loopback functions
verify analog and digital data paths.
The standard KSZ9031RNX is available in the 48-pin,
lead-free QFN package, and the AEC-Q100 automotive
qualified parts, KSZ9031RNXUA and KSZ9031RNXVA,
are available in the 48-pin lead-free WQFN package (see
Ordering Information).
Data sheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Functional Diagram
LinkMD is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 14, 2015
Revision 2.2
Micrel, Inc.
KSZ9031RNX
Features (Continued)
Applications
• Programmable LED outputs for link, activity, and
speed
• Baseline wander correction
• LinkMD TDR-based cable diagnostic to identify faulty
copper cabling
• Parametric NAND tree support to detect faults
between chip I/Os and board
• Loopback modes for diagnostics
• Automatic MDI/MDI-X crossover to detect and correct
pair swap at all speeds of operation
• Automatic detection and correction of pair swaps, pair
skew, and pair polarity
• MDC/MDIO management interface for PHY register
configuration
• Interrupt pin option
• Power-down and power-saving modes
• Operating voltages
– Core (DVDDL, AVDDL, AVDDL_PLL):
1.2V (external FET or regulator)
– VDD I/O (DVDDH):
3.3V, 2.5V, or 1.8V
– Transceiver (AVDDH):
3.3V or 2.5V (commercial temp)
• Available in a 48-pin QFN (7mm × 7mm) package
•
•
•
•
•
•
•
•
•
•
•
Laser/network printer
Network attached storage (NAS)
Network server
Gigabit LAN on motherboard (GLOM)
Broadband gateway
Gigabit SOHO/SMB router
IPTV
IP set-top box
Game console
Triple-play (data, voice, video) media center
Media converter
Ordering Information
Temperature
Range
Package
Lead
Finish
Wire
Bonding
0°C to 70°C
48-Pin QFN
Pb-Free
Gold
0°C to 70°C
48-Pin QFN
Pb-Free
Copper
(1)
−40°C to 85°C
48-Pin QFN
Pb-Free
Gold
(1)
−40°C to 85°C
48-Pin QFN
Pb-Free
Copper
(1)
−40°C to 85°C
48-Pin WQFN
Pb-Free
Gold
RGMII, AEC-Q100 Automotive Qualified to 85°C,
Gold Wire Bonding
(1)
−40°C to 105°C
48-Pin WQFN
Pb-Free
Gold
RGMII, AEC-Q100 Automotive Qualified to
105°C, Gold Wire Bonding
0°C to 70°C
48-Pin QFN
Pb-Free
Part Number
KSZ9031RNXCA
(1)
KSZ9031RNXCC
KSZ9031RNXIA
KSZ9031RNXIC
KSZ9031RNXUA
KSZ9031RNXVA
Description
RGMII, Commercial Temperature, Gold Wire
Bonding
RGMII, Commercial Temperature, Copper Wire
Bonding
RGMII, Industrial Temperature, Gold Wire
Bonding
RGMII, Industrial Temperature, Copper Wire
Bonding
KSZ9031RNX Evaluation Board
KSZ9031RNX-EVAL
(Mounted with KSZ9031RNX device in
commercial temperature)
Note:
1.
Contact factory for availability.
May 14, 2015
2
Revision 2.2
Micrel, Inc.
KSZ9031RNX
Revision History
Revision
Date
Summary of Changes
1.0
10/31/12
Data sheet created
• Updated Functional Diagram with “PME_N” signal.
• Indicated pin type is not an open-drain for PME_N1 (Pin 17) and INT_N/PME_N2 (Pin 38).
(11)
• Deleted TSLP package height from Package Information
2.0
07/31/13
and Recommended Land Pattern.
• Added typical series resistance and load capacitance for crystal selection criteria.
• Added setup/hold timings for integrated delays per the RGMII v2.0 Specification.
• Added note that RGMII data-to-clock skews for 10/100Mbps speeds are looser than for 1000Mbps
speed.
• Corrected register definition for override strap-in for LED_MODE in MMD Address 2h, Register 0h.
• Clarified register description for software power-down bit (Register 0h, Bit [11]).
• Clarified power cycling specification to have all supply voltages to the KSZ9031RNX reach less
than 0.4V before the next power-up cycle.
• Added AEC-Q100 automotive qualified part numbers, KSZ9031RNXUA and KSZ9031RNXVA, to
General Description, Features, Ordering Information and Electrical Characteristics
(10)
sections.
(11)
2.1
11/18/14
• Added Package Information
and Recommended Land Pattern for 48-pin (7mm x 7mm)
WQFN for the automotive qualified part numbers.
• Corrected Package Information(11) and Recommended Land Pattern for 48-pin (7mm x 7mm)
QFN. This is a datasheet correction. There is no change to the 48-pin (7mm x 7mm) QFN package.
• Added note that internal pull-up values are measured with pin input voltage level at 1/2 DVDDH in
Electrical Characteristics
2.2
5/14/15
(10)
section.
• Corrected datasheet revision 2.1 formatting errors for Standard Register 13h.
• Added more details for XI (25MHz reference clock) input specification to Reference Clock –
Connection and Selection section.
• Added note in Standard Register 0h, Bit [12] to indicate when Auto-Negotiation is disabled, Auto
MDI-X is also automatically disabled.
• Added note in 10Base-T Receive section that all 7 bytes of preamble are removed.
• Added instruction in Register 9h, Bits [15:13] to enable 1000Base-T Test Mode.
• Added description in Auto-Negotiation Timing section to change FLP timing from 8ms to 16ms.
• Added MMD Address 0h, Registers 3h and 4h for FLP timing.
• Specified maximum frequency (minimum clock period) for MDC clock.
• Updated input leakage current for the digital input pins in Electrical Characteristics
(10)
• Added minimum output currents for the digital output pins in Electrical Characteristics
• Corrected output drive current for LED1 and LED2 pins in Electrical Characteristics
•
•
•
•
•
May 14, 2015
section.
(10)
(10)
section.
section.
Updated Reset Circuit section and added reset circuit with MIC826 Voltage Supervisor.
Clarified LED indication support for 1.8V DVDDH requires voltage level shifters.
Added 10/100 Speeds Only section.
Added section for MOSFET selection for optional on-chip LDO controller.
Clarified RGMII timing and added Original RGMII (v1.3) timing with external delay for reference.
3
Revision 2.2
Micrel, Inc.
KSZ9031RNX
Contents
General Description ................................................................................................................................................................ 1
Features .................................................................................................................................................................................. 1
Functional Diagram ................................................................................................................................................................. 1
Applications ............................................................................................................................................................................. 2
Ordering Information ............................................................................................................................................................... 2
Revision History ...................................................................................................................................................................... 3
Contents .................................................................................................................................................................................. 4
Pin Configuration ..................................................................................................................................................................... 8
Pin Description ........................................................................................................................................................................ 9
Strapping Options ................................................................................................................................................................. 14
Functional Overview .............................................................................................................................................................. 15
Functional Description: 10Base-T/100Base-TX Transceiver ................................................................................................ 16
100Base-TX Transmit.......................................................................................................................................................................... 16
100Base-TX Receive........................................................................................................................................................................... 16
Scrambler/De-Scrambler (100Base-TX only) ...................................................................................................................................... 16
10Base-T Transmit .............................................................................................................................................................................. 16
10Base-T Receive ............................................................................................................................................................................... 16
Functional Description: 1000Base-T Transceiver ................................................................................................................. 17
Analog Echo-Cancellation Circuit ........................................................................................................................................................ 17
Automatic Gain Control (AGC) ............................................................................................................................................................ 17
Analog-to-Digital Converter (ADC) ...................................................................................................................................................... 18
Timing Recovery Circuit ...................................................................................................................................................................... 18
Adaptive Equalizer............................................................................................................................................................................... 18
Trellis Encoder and Decoder ............................................................................................................................................................... 18
Functional Description: 10/100/1000 Transceiver Features ................................................................................................. 19
Auto MDI/MDI-X .................................................................................................................................................................................. 19
Pair-Swap, Alignment, and Polarity Check .......................................................................................................................................... 19
Wave Shaping, Slew-Rate Control, and Partial Response .................................................................................................................. 19
PLL Clock Synthesizer ........................................................................................................................................................................ 19
Auto-Negotiation ................................................................................................................................................................... 20
10/100 Speeds Only .............................................................................................................................................................. 21
RGMII Interface ..................................................................................................................................................................... 22
RGMII Signal Definition ....................................................................................................................................................................... 22
RGMII Signal Diagram ......................................................................................................................................................................... 23
RGMII Pad Skew Registers ................................................................................................................................................................. 23
RGMII In-Band Status ......................................................................................................................................................................... 27
MII Management (MIIM) Interface ......................................................................................................................................... 28
Interrupt (INT_N) ................................................................................................................................................................... 29
LED Mode ............................................................................................................................................................................. 29
Single-LED Mode ................................................................................................................................................................................ 29
Tri-color Dual-LED Mode ..................................................................................................................................................................... 29
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Micrel, Inc.
KSZ9031RNX
Loopback Mode ..................................................................................................................................................................... 30
Local (Digital) Loopback ...................................................................................................................................................................... 30
Remote (Analog) Loopback ................................................................................................................................................................. 31
®
LinkMD Cable Diagnostic .................................................................................................................................................... 32
NAND Tree Support .............................................................................................................................................................. 32
Power Management .............................................................................................................................................................. 33
Energy-Detect Power-Down Mode ...................................................................................................................................................... 33
Software Power-Down Mode ............................................................................................................................................................... 33
Chip Power-Down Mode ...................................................................................................................................................................... 33
Energy Efficient Ethernet (EEE) ............................................................................................................................................ 34
Transmit Direction Control (MAC-to-PHY) ........................................................................................................................................... 35
Receive Direction Control (PHY-to-MAC) ............................................................................................................................................ 36
Registers Associated with EEE ........................................................................................................................................................... 37
Wake-On-LAN ....................................................................................................................................................................... 38
Magic-Packet Detection....................................................................................................................................................................... 38
Customized-Packet Detection ............................................................................................................................................................. 38
Link Status Change Detection ............................................................................................................................................................. 39
Typical Current/Power Consumption .................................................................................................................................... 40
Register Map ......................................................................................................................................................................... 42
IEEE-Defined Registers ....................................................................................................................................................................... 42
Vendor-Specific Registers ................................................................................................................................................................... 42
Standard Registers ............................................................................................................................................................... 44
MMD Registers...................................................................................................................................................................... 54
MMD Registers – Descriptions ............................................................................................................................................................ 55
Absolute Maximum Ratings .................................................................................................................................................. 65
Operating Ratings ................................................................................................................................................................. 65
Electrical Characteristics ....................................................................................................................................................... 65
Timing Diagrams ................................................................................................................................................................... 69
RGMII Timing ...................................................................................................................................................................................... 69
Auto-Negotiation Timing ...................................................................................................................................................................... 72
MDC/MDIO Timing .............................................................................................................................................................................. 73
Power-Up/Power-Down/Reset Timing ................................................................................................................................................. 74
Reset Circuit .......................................................................................................................................................................... 75
Reference Circuits – LED Strap-In Pins ................................................................................................................................ 76
Reference Clock – Connection and Selection ...................................................................................................................... 77
On-chip LDO Controller – MOSFET Selection ...................................................................................................................... 77
Magnetic – Connection and Selection .................................................................................................................................. 78
Package Information and Recommended Land Pattern ....................................................................................................... 80
May 14, 2015
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
List of Figures
Figure 1. KSZ9031RNX Block Diagram ............................................................................................................................... 15
Figure 2. KSZ9031RNX 1000Base-T Transceiver Block Diagram – Single Channel.......................................................... 17
Figure 3. Auto-Negotiation Flow Chart ................................................................................................................................. 20
Figure 4. KSZ9031RNX RGMII Interface ............................................................................................................................. 23
Figure 5. Local (Digital) Loopback ....................................................................................................................................... 30
Figure 6. Remote (Analog) Loopback .................................................................................................................................. 31
Figure 7. LPI Mode (Refresh Transmissions and Quiet Periods) ........................................................................................ 34
Figure 8. LPI Transition – RGMII (1000Mbps) Transmit ...................................................................................................... 35
Figure 9. LPI Transition – RGMII (100Mbps) Transmit ........................................................................................................ 36
Figure 10. LPI Transition – RGMII (1000Mbps) Receive ..................................................................................................... 36
Figure 11. LPI Transition – RGMII (100Mbps) Receive ....................................................................................................... 37
Figure 12. RGMII v2.0 Spec (Figure 2 – Multiplexing and Timing Diagram – Original RGMII (v1.3) with external delay) ... 69
Figure 13. RGMII v2.0 Spec (Figure 3 – Multiplexing and Timing Diagram – RGMII-ID (v2.0) with internal chip delay) ..... 70
Figure 14. Auto-Negotiation Fast Link Pulse (FLP) Timing .................................................................................................. 72
Figure 15. MDC/MDIO Timing............................................................................................................................................... 73
Figure 16. Power-Up/Power-Down/Reset Timing ................................................................................................................. 74
Figure 17. Reset Circuit for Triggering by Power Supply ...................................................................................................... 75
Figure 18. Reset Circuit for Interfacing with CPU/FPGA Reset Output ................................................................................ 75
Figure 19. Rest Circuit with MIC826 Voltage Supervisor ...................................................................................................... 76
Figure 20. Reference Circuits for LED Strapping Pins ......................................................................................................... 76
Figure 21. 25MHz Crystal/Oscillator Reference Clock Connection ...................................................................................... 77
Figure 22. Typical Gigabit Magnetic Interface Circuit ........................................................................................................... 78
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
List of Tables
Table 1. MDI/MDI-X Pin Mapping ........................................................................................................................................ 19
Table 2. Auto-Negotiation Timers ........................................................................................................................................ 21
Table 3. RGMII Signal Definition .......................................................................................................................................... 22
Table 4. RGMII Pad Skew Registers ................................................................................................................................... 24
Table 5. Absolute Delay for 5-Bit Pad Skew Setting ............................................................................................................ 25
Table 6. Absolute Delay for 4-Bit Pad Skew Setting ............................................................................................................ 26
Table 7. RGMII In-Band Status ............................................................................................................................................ 27
Table 8. MII Management Frame Format for the KSZ9031RNX ......................................................................................... 28
Table 9. Single-LED Mode – Pin Definition .......................................................................................................................... 29
Table 10. Tri-color Dual-LED Mode – Pin Definition ............................................................................................................ 29
Table 11. NAND Tree Test Pin Order for KSZ9031RNX ..................................................................................................... 32
Table 12. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (3.3V) ................................................... 40
Table 13. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (1.8V) ................................................... 40
Table 14. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (2.5V) ................................................... 41
Table 15. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (1.8V) ................................................... 41
Table 16. Standard Registers Supported by KSZ9031RNX ................................................................................................ 42
Table 17. MMD Registers Supported by KSZ9031RNX ...................................................................................................... 43
Table 18. Portal Registers (Access to Indirect MMD Registers) .......................................................................................... 54
Table 19. RGMII v2.0 Specification (Timing Specifics from Table 2) .................................................................................. 71
Table 20. Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters ............................................................................... 72
Table 21. MDC/MDIO Timing Parameters ........................................................................................................................... 73
Table 22. Power-Up/Power-Down/Reset Timing Parameters ............................................................................................. 74
Table 23. Reference Crystal/Clock Selection Criteria .......................................................................................................... 77
Table 24. Magnetics Selection Criteria ................................................................................................................................ 79
Table 25. Compatible Single-Port 10/100/1000 Magnetics ................................................................................................. 79
May 14, 2015
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
Pin Configuration
48-Pin QFN
(Top View)
May 14, 2015
8
Revision 2.2
Micrel, Inc.
KSZ9031RNX
Pin Description
Pin Number
Pin Name
1
AVDDH
Type
P
(2)
Pin Function
3.3V/2.5V (commercial temp only) analog VDD
Media Dependent Interface[0], positive signal of differential pair
1000Base-T mode:
2
TXRXP_A
I/O
TXRXP_A corresponds to BI_DA+ for MDI configuration and BI_DB+ for
MDI-X configuration, respectively.
10Base-T/100Base-TX mode:
TXRXP_A is the positive transmit signal (TX+) for MDI configuration and the
positive receive signal (RX+) for MDI-X configuration, respectively.
Media Dependent Interface[0], negative signal of differential pair
1000Base-T mode:
3
TXRXM_A
I/O
TXRXM_A corresponds to BI_DA– for MDI configuration and BI_DB– for
MDI-X configuration, respectively.
10Base-T/100Base-TX mode:
TXRXM_A is the negative transmit signal (TX–) for MDI configuration and
the negative receive signal (RX–) for MDI-X configuration, respectively.
4
AVDDL
P
1.2V analog VDD
Media Dependent Interface[1], positive signal of differential pair
1000Base-T mode:
5
TXRXP_B
I/O
TXRXP_B corresponds to BI_DB+ for MDI configuration and BI_DA+ for
MDI-X configuration, respectively.
10Base-T/100Base-TX mode:
TXRXP_B is the positive receive signal (RX+) for MDI configuration and the
positive transmit signal (TX+) for MDI-X configuration, respectively.
Media Dependent Interface[1], negative signal of differential pair
1000Base-T mode:
6
TXRXM_B
I/O
TXRXM_B corresponds to BI_DB– for MDI configuration and BI_DA– for
MDI-X configuration, respectively.
10Base-T/100Base-TX mode:
TXRXM_B is the negative receive signal (RX–) for MDI configuration and
the negative transmit signal (TX–) for MDI-X configuration, respectively.
Media Dependent Interface[2], positive signal of differential pair
1000Base-T mode:
7
TXRXP_C
I/O
TXRXP_C corresponds to BI_DC+ for MDI configuration and BI_DD+ for
MDI-X configuration, respectively.
10Base-T/100Base-TX mode:
TXRXP_C is not used.
Note:
2.
P = Power supply.
GND = Ground.
I = Input.
O = Output.
I/O = Bi-directional.
Ipu = Input with internal pull-up (see Electrical Characteristics for value).
Ipu/O = Input with internal pull-up (see Electrical Characteristics for value)/Output.
May 14, 2015
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
Pin Description (Continued)
Pin Number
Pin Name
Type
(2)
Pin Function
Media Dependent Interface[2], negative signal of differential pair
1000Base-T mode:
8
TXRXM_C
I/O
TXRXM_C corresponds to BI_DC– for MDI configuration and BI_DD– for MDI-X
configuration, respectively.
10Base-T/100Base-TX mode:
TXRXM_C is not used.
9
AVDDL
P
1.2V analog VDD
Media Dependent Interface[3], positive signal of differential pair
1000Base-T mode:
10
TXRXP_D
I/O
TXRXP_D corresponds to BI_DD+ for MDI configuration and BI_DC+ for MDI-X
configuration, respectively.
10Base-T/100Base-TX mode:
TXRXP_D is not used.
Media Dependent Interface[3], negative signal of differential pair
1000Base-T mode:
11
TXRXM_D
I/O
TXRXM_D corresponds to BI_DD– for MDI configuration and BI_DC– for MDI-X
configuration, respectively.
10Base-T/100Base-TX mode:
TXRXM_D is not used.
12
AVDDH
P
3.3V/2.5V (commercial temp only) analog VDD
13
NC
–
No connect. This pin is not bonded and can be connected to digital ground for footprint
compatibility with the Micrel KSZ9021RN Gigabit PHY.
14
DVDDL
P
1.2V digital VDD
LED output:
Programmable LED2 output
Config mode:
The pull-up/pull-down value is latched as PHYAD[1] during
power-up/reset. See the Strapping Options section for details.
The LED2 pin is programmed by the LED_MODE strapping option (Pin 41), and is defined
as follows:
Single-LED Mode
Link
15
LED2/
PHYAD1
Pin State
LED Definition
Link off
H
OFF
Link on (any speed)
L
ON
Tri-Color Dual-LED Mode
I/O
Pin State
Link/Activity
LED Definition
LED2
LED1
LED2
LED1
Link off
H
H
OFF
OFF
1000 Link / No activity
L
H
ON
OFF
1000 Link / Activity (RX, TX)
Toggle
H
Blinking
OFF
100 Link / No activity
H
L
OFF
ON
100 Link / Activity (RX, TX)
H
Toggle
OFF
Blinking
10 Link / No activity
L
L
ON
ON
10 Link / Activity (RX, TX)
Toggle
Toggle
Blinking
Blinking
For tri-color dual-LED mode, LED2 works in conjunction with LED1 (Pin 17) to indicate
10Mbps link and activity.
May 14, 2015
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
Pin Description (Continued)
Pin Number
Pin Name
16
DVDDH
Type
P
(2)
Pin Function
3.3V, 2.5V, or 1.8V digital VDD_I/O
LED1 output:
Programmable LED1 output
Config mode:
The voltage on this pin is sampled and latched during the powerup/reset process to determine the value of PHYAD[0]. See the
Strapping Options section for details.
PME_N output:
Programmable PME_N output (pin option 1). This pin function
requires an external pull-up resistor to DVDDH (digital VDD_I/O) in a
range from 1.0kΩ to 4.7kΩ. When asserted low, this pin
signals that a WOL event has occurred.
This pin is not an open-drain for all operating modes.
The LED1 pin is programmed by the LED_MODE strapping option (Pin 41), and is
defined as follows.
Single-LED Mode
LED1/
PHYAD0/
17
I/O
Activity
Pin State
LED Definition
No activity
H
OFF
Activity (RX, TX)
Toggle
Blinking
Tri-Color Dual-LED Mode
PME_N1
Pin State
Link/Activity
LED Definition
LED2
LED1
LED2
LED1
Link off
H
H
OFF
OFF
1000 Link / No activity
L
H
ON
OFF
1000 Link / Activity (RX, TX)
Toggle
H
Blinking
OFF
100 Link / No activity
H
L
OFF
ON
100 Link / Activity (RX, TX)
H
Toggle
OFF
Blinking
10 Link / No activity
L
L
ON
ON
10 Link / Activity (RX, TX)
Toggle
Toggle
Blinking
Blinking
For tri-color dual-LED mode, LED1 works in conjunction with LED2 (Pin 15) to
indicate 10Mbps link and activity.
18
DVDDL
P
1.2V digital VDD
19
TXD0
I
RGMII mode: RGMII TD0 (Transmit Data 0) input
20
TXD1
I
RGMII mode: RGMII TD1 (Transmit Data 1) input
21
TXD2
I
RGMII mode: RGMII TD2 (Transmit Data 2) input
22
TXD3
I
RGMII mode: RGMII TD3 (Transmit Data 3) input
23
DVDDL
P
1.2V digital VDD
24
GTX_CLK
I
RGMII mode:RGMII TXC (Transmit Reference Clock) input
25
TX_EN
I
RGMII mode:RGMII TX_CTL (Transmit Control) input
26
DVDDL
P
1.2V digital VDD
27
28
May 14, 2015
RXD3/
MODE3
RXD2/
MODE2
RGMII mode:
I/O
RGMII mode:
I/O
RGMII RD3 (Receive Data 3) output
Config mode: The pull-up/pull-down value is latched as MODE3 during powerup/reset. See the Strapping Options section for details.
RGMII RD2 (Receive Data 2) output
Config mode: The pull-up/pull-down value is latched as MODE2 during powerup/reset. See the Strapping Options section for details.
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
Pin Description (Continued)
Pin Number
Pin Name
Type
(2)
29
VSS
GND
30
DVDDL
P
31
32
33
34
35
RXD1/
MODE1
RXD0/
MODE0
RX_DV/
CLK125_EN
DVDDH
RX_CLK/
PHYAD2
Pin Function
Digital ground
1.2V digital VDD
RGMII mode: RGMII RD1 (Receive Data 1) output
I/O
Config mode: The pull-up/pull-down value is latched as MODE1 during
up/reset. See the Strapping Options section for details.
power-
RGMII mode: RGMII RD0 (Receive Data 0) output
I/O
Config mode: The pull-up/pull-down value is latched as MODE0 during
up/reset. See the Strapping Options section for details.
power-
RGMII mode: RGMII RX_CTL (Receive Control) output
I/O
P
Config mode: Latched as CLK125_NDO Output Enable during
power-up/reset. See the Strapping Options section for details.
3.3V, 2.5V, or 1.8V digital VDD_I/O
RGMII mode: RGMII RXC (Receive Reference Clock) output
I/O
36
MDC
Ipu
37
MDIO
Ipu/O
Config mode: The pull-up/pull-down value is latched as PHYAD[2] during
power-up/reset. See the Strapping Options section for details.
Management data clock input
This pin is the input reference clock for MDIO (Pin 37).
Management data input/output
Interrupt output: Programmable interrupt output, with Register 1Bh as the Interrupt
Control/Status register, for programming the interrupt conditions
and reading the interrupt status. Register 1Fh, Bit [14] sets
the interrupt output to active low (default) or active high.
INT_N/
38
This pin is synchronous to MDC (Pin 36) and requires an external pull-up resistor to
DVDDH (digital VDD_I/O) in a range from 1.0kΩ to 4.7kΩ.
O
PME_N2
PME_N output:
Programmable PME_N output (pin option 2). When asserted
low, this pin signals that a WOL event has occurred.
For Interrupt (when active low) and PME functions, this pin requires an external pullup resistor to DVDDH (digital VDD_I/O) in a range from 1.0kΩ to 4.7kΩ.
This pin is not an open-drain for all operating modes.
39
DVDDL
P
40
DVDDH
P
3.3V, 2.5V, or 1.8V digital VDD_I/O
125MHz clock output
CLK125_NDO/
41
1.2V digital VDD
I/O
This pin provides a 125MHz reference clock output option for use by the MAC.
Config mode: The pull-up/pull-down value is latched as LED_MODE during
power-up/reset. See the Strapping Options section for details.
LED_MODE
Chip reset (active low)
42
RESET_N
Ipu
Hardware pin configurations are strapped-in at the de-assertion (rising edge) of
RESET_N. See the Strapping Options section for more details.
On-chip 1.2V LDO controller output
43
LDO_O
O
This pin drives the input gate of a P-channel MOSFET to generate 1.2V for the
chip’s core voltages. If the system provides 1.2V and this pin is not used, it can be
left floating.
44
AVDDL_PLL
P
1.2V analog VDD for PLL
45
XO
O
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25MHz crystal feedback
This pin is a no connect if an oscillator or external clock source is used.
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Pin Description (Continued)
Pin Number
Pin Name
Type
46
XI
I
47
NC
–
48
ISET
I/O
(2)
Pin Function
Crystal / Oscillator/ External Clock input
25MHz ±50ppm tolerance
No connect
PADDLE
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P_GND
GND
This pin is not bonded and can be connected to AVDDH power for footprint
compatibility with the Micrel KSZ9021RN Gigabit PHY.
Set the transmit output level
Connect a 12.1kΩ 1% resistor to ground on this pin.
Exposed paddle on bottom of chip
Connect P_GND to ground.
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Strapping Options
(3 )
Pin Number
Pin Name
35
PHYAD2
I/O
15
PHYAD1
I/O
Pull-up = 1
17
PHYAD0
I/O
Pull-down = 0
Type
Pin Function
The PHY address, PHYAD[2:0], is sampled and latched at power-up/reset and is
configurable to any value from 0 to 7. Each PHY address bit is configured as follows:
PHY Address Bits [4:3] are always set to ‘00’.
The MODE[3:0] strap-in pins are sampled and latched at power-up/reset as follows:
MODE[3:0]
Mode
0000
Reserved – not used
0001
Reserved – not used
0010
Reserved – not used
0011
Reserved – not used
0100
NAND tree mode
0101
Reserved – not used
27
MODE3
I/O
0110
Reserved – not used
28
MODE2
I/O
0111
Chip power-down mode
31
MODE1
I/O
32
MODE0
I/O
1000
Reserved – not used
1001
Reserved – not used
1010
Reserved – not used
1011
Reserved – not used
1100
RGMII mode – advertise 1000Base-T full-duplex only
1101
RGMII mode – advertise 1000Base-T full- and half-duplex only
1110
RGMII mode – advertise all capabilities (10/100/1000 speed
half-/full-duplex), except 1000Base-T half-duplex
1111
RGMII mode – advertise all capabilities (10/100/1000 speed
half-/full-duplex)
CLK125_EN is sampled and latched at power-up/reset and is defined as follows:
Pull-up = Enable 125MHz clock output
33
CLK125_EN
I/O
Pull-down = Disable 125MHz clock output
Pin 41 (CLK125_NDO) provides the 125MHz reference clock output option for use by
the MAC.
LED_MODE is latched at power-up/reset and is defined as follows:
41
LED_MODE
I/O
Pull-up = Single-LED mode
Pull-down = Tri-color dual-LED mode
Note:
3.
I/O = Bi-directional.
Pin strap-ins are latched during power-up or reset. In some systems, the MAC receive input pins may be driven during
power-up or reset, and consequently cause the PHY strap-in pins on the RGMII signals to be latched to an incorrect
configuration. In this case, Micrel recommends adding external pull-ups/pull-downs on the PHY strap-in pins to ensure the
PHY is configured to the correct pin strap-in mode.
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Functional Overview
The KSZ9031RNX is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physical layer
transceiver solution for transmission and reception of data over a standard CAT-5 unshielded twisted pair (UTP) cable. Its
on-chip proprietary 1000Base-T transceiver and Manchester/MLT-3 signaling-based 10Base-T/100Base-TX transceivers
are all IEEE 802.3 compliant.
The KSZ9031RNX reduces board cost and simplifies board layout by using on-chip termination resistors for the four
differential pairs and by integrating an LDO controller to drive a low-cost MOSFET to supply the 1.2V core.
On the copper media interface, the KSZ9031RNX can automatically detect and correct for differential pair misplacements
and polarity reversals, and correct propagation delays and re-sync timing between the four differential pairs, as specified
in the IEEE 802.3 standard for 1000Base-T operation.
The KSZ9031RNX provides the RGMII interface for direct and seamless connection to RGMII MACs in Gigabit Ethernet
processors and switches for data transfer at 10/100/1000Mbps.
Figure 1 shows a high-level block diagram of the KSZ9031RNX.
Figure 1. KSZ9031RNX Block Diagram
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Functional Description: 10Base-T/100Base-TX Transceiver
100Base-TX Transmit
The 100Base-TX transmit function performs parallel-to-serial conversion, 4B/5B coding, scrambling, NRZ-to-NRZI
conversion, and MLT-3 encoding and transmission.
The circuitry starts with a parallel-to-serial conversion, which converts the RGMII data from the MAC into a 125MHz serial
bit stream. The data and control stream is then converted into 4B/5B coding, followed by a scrambler. The serialized data
is further converted from NRZ-to-NRZI format then transmitted in MLT-3 current output. The output current is set by an
external 12.1kΩ 1% resistor for the 1:1 transformer ratio.
The output signal has a typical rise/fall time of 4ns and complies with the ANSI TP-PMD standard regarding amplitude
balance, overshoot, and timing jitter. The wave-shaped 10Base-T output is also incorporated into the 100Base-TX
transmitter.
100Base-TX Receive
The 100BASE-TX receiver function performs adaptive equalization, DC restoration, MLT-3-to-NRZI conversion, data and
clock recovery, NRZI-to-NRZ conversion, de-scrambling, 4B/5B decoding, and serial-to-parallel conversion.
The receiving side starts with the equalization filter to compensate for inter-symbol interference (ISI) over the twisted pair
cable. Because the amplitude loss and phase distortion are a function of the cable length, the equalizer must adjust its
characteristics to optimize performance. In this design, the variable equalizer makes an initial estimation based on
comparisons of incoming signal strength against some known cable characteristics, then tunes itself for optimization. This
is an ongoing process and self-adjusts against environmental changes such as temperature variations.
Next, the equalized signal goes through a DC-restoration and data-conversion block. The DC-restoration circuit
compensates for the effect of baseline wander and improves the dynamic range. The differential data-conversion circuit
converts the MLT-3 format back to NRZI. The slicing threshold is also adaptive.
The clock-recovery circuit extracts the 125MHz clock from the edges of the NRZI signal. This recovered clock is then used
to convert the NRZI signal into the NRZ format. This signal is sent through the de-scrambler followed by the 4B/5B
decoder. Finally, the NRZ serial data is converted to the RGMII format and provided as the input data to the MAC.
Scrambler/De-Scrambler (100Base-TX only)
The purpose of the scrambler is to spread the power spectrum of the signal to reduce electromagnetic interference (EMI)
and baseline wander. Transmitted data is scrambled using an 11-bit wide linear feedback shift register (LFSR). The
scrambler generates a 2047-bit non-repetitive sequence, then the receiver de-scrambles the incoming data stream using
the same sequence as at the transmitter.
10Base-T Transmit
The 10Base-T output drivers are incorporated into the 100Base-TX drivers to allow for transmission with the same
magnetic. The drivers perform internal wave-shaping and pre-emphasis, and output signals with a typical amplitude of
2.5V peak for standard 10Base-T mode and 1.75V peak for energy-efficient 10Base-Te mode. The 10Base-T/10Base-Te
signals have harmonic contents that are at least 31dB below the fundamental frequency when driven by an all-ones
Manchester-encoded signal.
10Base-T Receive
On the receive side, input buffer and level-detecting squelch circuits are used. A differential input receiver circuit and a
phase-locked loop (PLL) perform the decoding function. The Manchester-encoded data stream is separated into clock
signal and NRZ data. A squelch circuit rejects signals with levels less than 300mV or with short pulse widths to prevent
noises at the receive inputs from falsely triggering the decoder. When the input exceeds the squelch limit, the PLL locks
onto the incoming signal and the KSZ9031RNX decodes a data frame. The receiver clock is maintained active during idle
periods between receiving data frames.
The KSZ9031RNX removes all 7 bytes of the preamble and presents the received frame starting with the SFD (start of
frame delimiter) to the MAC.
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Auto-polarity correction is provided for the receive differential pair to automatically swap and fix the incorrect +/– polarity
wiring in the cabling.
Functional Description: 1000Base-T Transceiver
The 1000Base-T transceiver is based-on a mixed-signal/digital-signal processing (DSP) architecture, which includes the
analog front-end, digital channel equalizers, trellis encoders/decoders, echo cancellers, cross-talk cancellers, precision
clock recovery scheme, and power-efficient line drivers.
Figure 2 shows a high-level block diagram of a single channel of the 1000Base-T transceiver for one of the four
differential pairs.
Figure 2. KSZ9031RNX 1000Base-T Transceiver Block Diagram – Single Channel
Analog Echo-Cancellation Circuit
In 1000Base-T mode, the analog echo-cancellation circuit helps to reduce the near-end echo. This analog hybrid circuit
relieves the burden of the ADC and the adaptive equalizer.
This circuit is disabled in 10Base-T/100Base-TX mode.
Automatic Gain Control (AGC)
In 1000Base-T mode, the automatic gain control (AGC) circuit provides initial gain adjustment to boost up the signal level.
This pre-conditioning circuit is used to improve the signal-to-noise ratio of the receive signal.
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Analog-to-Digital Converter (ADC)
In 1000Base-T mode, the analog-to-digital converter (ADC) digitizes the incoming signal. ADC performance is essential to
the overall performance of the transceiver.
This circuit is disabled in 10Base-T/100Base-TX mode.
Timing Recovery Circuit
In 1000Base-T mode, the mixed-signal clock recovery circuit together with the digital phase-locked loop is used to recover
and track the incoming timing information from the received data. The digital phase-locked loop has very low long-term
jitter to maximize the signal-to-noise ratio of the receive signal.
The 1000Base-T slave PHY must transmit the exact receive clock frequency recovered from the received data back to the
1000Base-T master PHY. Otherwise, the master and slave will not be synchronized after long transmission. This also
helps to facilitate echo cancellation and NEXT removal.
Adaptive Equalizer
In 1000Base-T mode, the adaptive equalizer provides the following functions:
•
•
•
Detection for partial response signaling
Removal of NEXT and ECHO noise
Channel equalization
Signal quality is degraded by residual echo that is not removed by the analog hybrid because of impedance mismatch.
The KSZ9031RNX uses a digital echo canceller to further reduce echo components on the receive signal.
In 1000Base-T mode, data transmission and reception occurs simultaneously on all four pairs of wires (four channels).
This results in high-frequency cross-talk coming from adjacent wires. The KSZ9031RNX uses three NEXT cancellers on
each receive channel to minimize the cross-talk induced by the other three channels.
In 10Base-T/100Base-TX mode, the adaptive equalizer needs only to remove the inter-symbol interference and recover
the channel loss from the incoming data.
Trellis Encoder and Decoder
In 1000Base-T mode, the transmitted 8-bit data is scrambled into 9-bit symbols and further encoded into 4D-PAM5
symbols. The initial scrambler seed is determined by the specific PHY address to reduce EMI when more than one
KSZ9031RNX is used on the same board. On the receiving side, the idle stream is examined first. The scrambler seed,
pair skew, pair order, and polarity must be resolved through the logic. The incoming 4D-PAM5 data is then converted into
9-bit symbols and de-scrambled into 8-bit data.
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Functional Description: 10/100/1000 Transceiver Features
Auto MDI/MDI-X
The Automatic MDI/MDI-X feature eliminates the need to determine whether to use a straight cable or a crossover cable
between the KSZ9031RNX and its link partner. This auto-sense function detects the MDI/MDI-X pair mapping from the
link partner, and assigns the MDI/MDI-X pair mapping of the KSZ9031RNX accordingly.
Table 1 shows the KSZ9031RNX 10/100/1000 pin configuration assignments for MDI/MDI-X pin mapping.
Table 1. MDI/MDI-X Pin Mapping
Pin (RJ-45 pair)
MDI
MDI-X
1000Base-T
100Base-TX
10Base-T
1000Base-T
100Base-TX
10Base-T
TXRXP/M_A (1,2)
A+/–
TX+/–
TX+/–
B+/–
RX+/–
RX+/–
TXRXP/M_B (3,6)
B+/–
RX+/–
RX+/–
A+/–
TX+/–
TX+/–
TXRXP/M_C (4,5)
C+/–
Not used
Not used
D+/–
Not used
Not used
TXRXP/M_D (7,8)
D+/–
Not used
Not used
C+/–
Not used
Not used
Auto MDI/MDI-X is enabled by default. It is disabled by writing a one to Register 1Ch, Bit [6]. MDI and MDI-X mode is set
by Register 1Ch, Bit [7] if Auto MDI/MDI-X is disabled.
An isolation transformer with symmetrical transmit and receive data paths is recommended to support Auto MDI/MDI-X.
Pair-Swap, Alignment, and Polarity Check
In 1000Base-T mode, the KSZ9031RNX
•
•
Detects incorrect channel order and automatically restores the pair order for the A, B, C, D pairs (four channels)
Supports 50±10ns difference in propagation delay between pairs of channels in accordance with the IEEE 802.3
standard, and automatically corrects the data skew so the corrected four pairs of data symbols are synchronized
Incorrect pair polarities of the differential signals are automatically corrected for all speeds.
Wave Shaping, Slew-Rate Control, and Partial Response
In communication systems, signal transmission encoding methods are used to provide the noise-shaping feature and to
minimize distortion and error in the transmission channel.
•
•
•
For 1000Base-T, a special partial-response signaling method is used to provide the band-limiting feature for the
transmission path.
For 100Base-TX, a simple slew-rate control method is used to minimize EMI.
For 10Base-T, pre-emphasis is used to extend the signal quality through the cable.
PLL Clock Synthesizer
The KSZ9031RNX generates 125MHz, 25MHz, and 10MHz clocks for system timing. Internal clocks are generated from
the external 25MHz crystal or reference clock.
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Auto-Negotiation
The KSZ9031RNX conforms to the auto-negotiation protocol, defined in Clause 28 of the IEEE 802.3 Specification.
Auto-negotiation allows UTP (unshielded twisted pair) link partners to select the highest common mode-of-operation.
During auto-negotiation, link partners advertise capabilities across the UTP link to each other, and then compare their own
capabilities with those they received from their link partners. The highest speed and duplex setting that is common to the
two link partners is selected as the operating mode.
The following list shows the speed and duplex operation mode from highest-to-lowest.
•
•
•
•
•
•
Priority 1:
Priority 2:
Priority 3:
Priority 4:
Priority 5:
Priority 6:
1000Base-T, full-duplex
1000Base-T, half-duplex
100Base-TX, full-duplex
100Base-TX, half-duplex
10Base-T, full-duplex
10Base-T, half-duplex
If auto-negotiation is not supported or the KSZ9031RNX link partner is forced to bypass auto-negotiation for 10Base-T
and 100Base-TX modes, the KSZ9031RNX sets its operating mode by observing the input signal at its receiver. This is
known as parallel detection, and allows the KSZ9031RNX to establish a link by listening for a fixed signal protocol in the
absence of the auto-negotiation advertisement protocol.
The auto-negotiation link-up process is shown in Figure 3.
Figure 3. Auto-Negotiation Flow Chart
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For 1000Base-T mode, auto-negotiation is always required to establish a link. During 1000Base-T auto-negotiation, the
master and slave configuration is first resolved between link partners. Then the link is established with the highest
common capabilities between link partners.
Auto-negotiation is enabled by default after power-up or hardware reset. After that, auto-negotiation can be enabled or
disabled through Register 0h, Bit [12]. If auto-negotiation is disabled, the speed is set by Register 0h, Bits [6, 13] and the
duplex is set by Register 0h, Bit [8].
If the speed is changed on the fly, the link goes down and auto-negotiation and parallel detection initiate until a common
speed between KSZ9031RNX and its link partner is re-established for a link.
If the link is already established and there is no change of speed on the fly, the changes (for example, duplex and pause
capabilities) will not take effect unless either auto-negotiation is restarted through Register 0h, Bit [9], or a link-down to
link-up transition occurs (that is, disconnecting and reconnecting the cable).
After auto-negotiation is completed, the link status is updated in Register 1h, Bit [2], and the link partner capabilities are
updated in Registers 5h, 6h, 8h, and Ah.
The auto-negotiation finite state machines use interval timers to manage the auto-negotiation process. The duration of
these timers under normal operating conditions is summarized in Table 2.
Table 2. Auto-Negotiation Timers
Auto-Negotiation Interval Timers
Time Duration
Transmit burst interval
16ms
Transmit pulse interval
68µs
FLP detect minimum time
17.2µs
FLP detect maximum time
185µs
Receive minimum burst interval
6.8ms
Receive maximum burst interval
112ms
Data detect minimum interval
35.4µs
Data detect maximum interval
95µs
NLP test minimum interval
4.5ms
NLP test maximum interval
30ms
Link loss time
52ms
Break link time
1480ms
Parallel detection wait time
830ms
Link enable wait time
1000ms
10/100 Speeds Only
Some applications require link-up to be limited to 10/100Mbps speeds only.
After power-up/reset, the KSZ9031RNX can be restricted to auto-negotiate and link-up to 10/100Mbps speeds only by
programming the following register settings:
1. Set Register 0h, Bit [6] = ‘0’ to remove 1000Mbps speed.
2. Set Register 9h, Bits [9:8] = ‘00’ to remove Auto-Negotiation Advertisements for 1000Mbps full/half duplex.
3. Write a ‘1’ to Register 0h, Bit [9], a self-clearing bit, to force a restart of Auto-Negotiation.
Auto-Negotiation and 10Base-T/100Base-TX speeds use only differential pairs A (pins 2, 3) and B (pins 5, 6). Differential
pairs C (pins 7, 8) and D (pins 10, 11) can be left as no connects.
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RGMII Interface
The Reduced Gigabit Media Independent Interface (RGMII) supports on-chip data-to-clock delay timing according to the
RGMII Version 2.0 Specification, with programming options for external delay timing and to adjust and correct TX and RX
timing paths.
RGMII provides a common interface between RGMII PHYs and MACs, and has the following key characteristics:
•
•
•
•
Pin count is reduced from 24 pins for the IEEE Gigabit Media Independent Interface (GMII) to 12 pins for RGMII.
All speeds (10Mbps, 100Mbps, and 1000Mbps) are supported at both half- and full-duplex.
Data transmission and reception are independent and belong to separate signal groups.
Transmit data and receive data are each four bits wide, a nibble.
In RGMII operation, the RGMII pins function as follows:
•
•
•
•
•
The MAC sources the transmit reference clock, TXC, at 125MHz for 1000Mbps, 25MHz for 100Mbps, and 2.5MHz for
10Mbps.
The PHY recovers and sources the receive reference clock, RXC, at 125MHz for 1000Mbps, 25MHz for 100Mbps,
and 2.5MHz for 10Mbps.
For 1000Base-T, the transmit data, TXD[3:0], is presented on both edges of TXC, and the received data, RXD[3:0], is
clocked out on both edges of the recovered 125MHz clock, RXC.
For 10Base-T/100Base-TX, the MAC holds TX_CTL low until both PHY and MAC operate at the same speed. During
the speed transition, the receive clock is stretched on either a positive or negative pulse to ensure that no clock glitch
is presented to the MAC.
TX_ER and RX_ER are combined with TX_EN and RX_DV, respectively, to form TX_CTL and RX_CTL. These two
RGMII control signals are valid at the falling clock edge.
After power-up or reset, the KSZ9031RNX is configured to RGMII mode if the MODE[3:0] strap-in pins are set to one of
the RGMII mode capability options. See the Strapping Options section for available options.
The KSZ9031RNX has the option to output a 125MHz reference clock on the CLK125_NDO pin. This clock provides a
lower-cost reference clock alternative for RGMII MACs that require a 125MHz crystal or oscillator. The 125MHz clock
output is enabled after power-up or reset if the CLK125_EN strap-in pin is pulled high.
RGMII Signal Definition
Table 3 describes the RGMII signals. Refer to the RGMII Version 2.0 Specification for more detailed information.
Table 3. RGMII Signal Definition
RGMII
RGMII
Signal Name Signal Name
(per spec)
(per KSZ9031RNX)
Pin Type
(with respect
to PHY)
Pin Type
(with respect
to MAC)
Description
Transmit Reference Clock
TXC
GTX_CLK
Input
Output
(125MHz for 1000Mbps, 25MHz for 100Mbps, 2.5MHz for
10Mbps)
TX_CTL
TX_EN
Input
Output
Transmit Control
TXD[3:0]
TXD[3:0]
Input
Output
Transmit Data[3:0]
RXC
RX_CLK
Output
Input
(125MHz for 1000Mbps, 25MHz for 100Mbps, 2.5MHz for
10Mbps)
RX_CTL
RX_DV
Output
Input
Receive Control
RXD[3:0]
RXD[3:0]
Output
Input
Receive Data[3:0]
Receive Reference Clock
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RGMII Signal Diagram
The KSZ9031RNX RGMII pin connections to the MAC are shown in Figure 4.
Figure 4. KSZ9031RNX RGMII Interface
RGMII Pad Skew Registers
Pad skew registers are available for all RGMII pins (clocks, control signals, and data bits) to provide programming options
to adjust or correct the timing relationship for each RGMII pin. Because RGMII is a source-synchronous bus interface, the
timing relationship needs to be maintained only within the RGMII pin’s respective timing group.
•
•
RGMII transmit timing group pins:
RGMII receive timing group pins:
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RX_CLK, RX_DV, RXD[3:0]
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Table 4 details the four registers located at MMD Address 2h that are provided for pad skew programming.
Table 4. RGMII Pad Skew Registers
Address
Name
Description
Mode
Default
MMD Address 2h, Register 4h – RGMII Control Signal Pad Skew
2.4.15:8
Reserved
Reserved
RW
0000_0000
2.4.7:4
RX_DV
Pad Skew
RGMII RX_CTL output pad skew control (0.06ns/step)
RW
0111
2.4.3:0
TX_EN
Pad Skew
RGMII TX_CTL input pad skew control (0.06ns/step)
RW
0111
MMD Address 2h, Register 5h – RGMII RX Data Pad Skew
2.5.15:12
RXD3
Pad Skew
RGMII RXD3 output pad skew control (0.06ns/step)
RW
0111
2.5.11:8
RXD2
Pad Skew
RGMII RXD2 output pad skew control (0.06ns/step)
RW
0111
2.5.7:4
RXD1
Pad Skew
RGMII RXD1 output pad skew control (0.06ns/step)
RW
0111
2.5.3:0
RXD0
Pad Skew
RGMII RXD0 output pad skew control (0.06ns/step)
RW
0111
MMD Address 2h, Register 6h – RGMII TX Data Pad Skew
2.6.15:12
TXD3
Pad Skew
RGMII TXD3 input pad skew control (0.06ns/step)
RW
0111
2.6.11:8
TXD2
Pad Skew
RGMII TXD2 input pad skew control (0.06ns/step)
RW
0111
2.6.7:4
TXD1
Pad Skew
RGMII TXD1 input pad skew control (0.06ns/step)
RW
0111
2.6.3:0
TXD0
Pad Skew
RGMII TXD0 input pad skew control (0.06ns/step)
RW
0111
MMD Address 2h, Register 8h – RGMII Clock Pad Skew
2.8.15:10
Reserved
Reserved
RW
0000_00
2.8.9:5
GTX_CLK
Pad Skew
RGMII GTX_CLK input pad skew control (0.06ns/step)
RW
01_111
2.8.4:0
RX_CLK
Pad Skew
RGMII RX_CLK output pad skew control (0.06ns/step)
RW
0_1111
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The RGMII control signals and data bits have 4-bit skew settings, while the RGMII clocks have 5-bit skew settings.
Each register bit is approximately a 0.06ns step change. A single-bit decrement decreases the delay by approximately
0.06ns, while a single-bit increment increases the delay by approximately 0.06ns.
Table 5 and Table 6 list the approximate absolute delay for each pad skew (value) setting.
Table 5. Absolute Delay for 5-Bit Pad Skew Setting
Pad Skew (value)
May 14, 2015
Delay (ns)
0_0000
–0.90
0_0001
–0.84
0_0010
–0.78
0_0011
–0.72
0_0100
–0.66
0_0101
–0.60
0_0110
–0.54
0_0111
–0.48
0_1000
–0.42
0_1001
–0.36
0_1010
–0.30
0_1011
–0.24
0_1100
–0.18
0_1101
–0.12
0_1110
–0.06
0_1111
No delay adjustment (default value)
1_0000
+0.06
1_0001
+0.12
1_0010
+0.18
1_0011
+0.24
1_0100
+0.30
1_0101
+0.36
1_0110
+0.42
1_0111
+0.48
1_1000
+0.54
1_1001
+0.60
1_1010
+0.66
1_1011
+0.72
1_1100
+0.78
1_1101
+0.84
1_1110
+0.90
1_1111
+0.96
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Table 6. Absolute Delay for 4-Bit Pad Skew Setting
Pad Skew (value)
Delay (ns)
0000
–0.42
0001
–0.36
0010
–0.30
0011
–0.24
0100
–0.18
0101
–0.12
0110
–0.06
0111
No delay adjustment (default value)
1000
+0.06
1001
+0.12
1010
+0.18
1011
+0.24
1100
+0.30
1101
+0.36
1110
+0.42
1111
+0.48
When computing the RGMII timing relationships, delays along the entire data path must be aggregated to determine the
total delay to be used for comparison between RGMII pins within their respective timing group. For the transmit data path,
total delay includes MAC output delay, MAC-to-PHY PCB routing delay, and PHY (KSZ9031RNX) input delay and skew
setting (if any). For the receive data path, the total delay includes PHY (KSZ9031RNX) output delay, PHY-to-MAC PCB
routing delay, and MAC input delay and skew setting (if any).
As the default, after power-up or reset, the KSZ9031RNX RGMII timing conforms to the timing requirements in the RGMII
Version 2.0 Specification for internal PHY chip delay.
For the transmit path (MAC to KSZ9031RNX), the KSZ9031RNX does not add any delay locally at its GTX_CLK, TX_EN
and TXD[3:0] input pins, and expects the GTX_CLK delay to be provided on-chip by the MAC. If MAC does not provide
any delay or insufficient delay for the GTX_CLK, the KSZ9031RNX has pad skew registers that can provide up to 1.38ns
on-chip delay.
For the receive path (KSZ9031RNX to MAC), the KSZ9031RNX adds 1.2ns typical delay to the RX_CLK output pin with
respect to RX_DV and RXD[3:0] output pins. If necessary, the KSZ9031RNX has pad skew registers that can adjust the
RX_CLK on-chip delay up to 2.58ns from the 1.2ns default delay.
The above default RGMII timings imply:
•
•
•
RX_CLK clock skew is set by the KSZ9031RNX default register settings.
GTX_CLK clock skew is provided by the MAC.
No PCB delay is required for GTX_CLK and RX_CLK clocks.
The following examples show how to read/write to MMD Address 2h, Register 8h for the RGMII GTX_CLK and RX_CLK
skew settings. MMD register access is through the direct portal Registers Dh and Eh. For more programming details, refer
to the MMD Registers – Descriptions section.
•
Read back value of MMD Address 2h, Register 8h.
- Write Register 0xD = 0x0002
- Write Register 0xE = 0x0008
- Write Register 0xD = 0x4002
- Read Register 0xE
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// Select MMD Device Address 2h
// Select Register 8h of MMD Device Address 2h
// Select register data for MMD Device Address 2h, Register 8h
// Read value of MMD Device Address 2h, Register 8h
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•
KSZ9031RNX
Write value 0x03FF (delay GTX_CLK and RX_CLK pad skews to their maximum values) to MMD Address 2h,
Register 8h
- Write Register 0xD = 0x0002
// Select MMD Device Address 2h
- Write Register 0xE = 0x0008
// Select Register 8h of MMD Device Address 2h
- Write Register 0xD = 0x4002
// Select register data for MMD Device Address 2h, Register 8h
- Write Register 0xE = 0x03FF
// Write value 0x03FF to MMD Device Address 2h, Register 8h
RGMII In-Band Status
The KSZ9031RNX provides in-band status to the MAC during the inter-frame gap when RX_DV is de-asserted. RGMII
in-band status is always enabled after power-up.
The in-band status is sent to the MAC using the RXD[3:0] data pins, and is described in Table 7.
Table 7. RGMII In-Band Status
RX_DV
RXD3
RXD[2:1]
RXD0
RX_CLK clock speed
0
Duplex Status
00 = 2.5MHz (10Mbps)
Link Status
(valid only when RX_DV is
low)
0 = Half-duplex
01 = 25MHz (100Mbps)
0 = Link down
1 = Full-duplex
10 = 125MHz (1000Mbps)
1 = Link up
11 = Reserved
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KSZ9031RNX
MII Management (MIIM) Interface
The KSZ9031RNX supports the IEEE 802.3 MII Management interface, also known as the Management Data Input/
Output (MDIO) interface. This interface allows upper-layer devices to monitor and control the state of the KSZ9031RNX.
An external device with MIIM capability is used to read the PHY status and/or configure the PHY settings. More details
about the MIIM interface can be found in Clause 22.2.4 of the IEEE 802.3 Specification.
The MIIM interface consists of the following:
•
•
•
A physical connection that incorporates the clock line (MDC) and the data line (MDIO).
A specific protocol that operates across the physical connection mentioned earlier, which allows an external controller
to communicate with one or more KSZ9031RNX devices. Each KSZ9031RNX device is assigned a unique PHY
address between 0h and 7h by the PHYAD[2:0] strapping pins.
A 32-register address space for direct access to IEEE-defined registers and vendor-specific registers, and for indirect
access to MMD addresses and registers. See the Register Map section.
PHY Address 0h is supported as the unique PHY address only; it is not supported as the broadcast PHY address, which
allows for a single write command to simultaneously program an identical PHY register for two or more PHY devices (for
example, using PHY Address 0h to set Register 0h to a value of 0x1940 to set Bit [11] to a value of one to enable
software power-down). Instead, separate write commands are used to program each PHY device.
Table 8 shows the MII Management frame format for the KSZ9031RNX.
Table 8. MII Management Frame Format for the KSZ9031RNX
PHY
Start of
Read/Write
Preamble
Address
Frame
OP Code
Bits [4:0]
REG
Address
Bits [4:0]
TA
Data
Bits [15:0]
Idle
Read
32 1’s
01
10
00AAA
RRRRR
Z0
DDDDDDDD_DDDDDDDD
Z
Write
32 1’s
01
01
00AAA
RRRRR
10
DDDDDDDD_DDDDDDDD
Z
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Interrupt (INT_N)
The INT_N pin is an optional interrupt signal that is used to inform the external controller that there has been a status
update in the KSZ9031RNX PHY Register. Bits [15:8] of Register 1Bh are the interrupt control bits that enable and disable
the conditions for asserting the INT_N signal. Bits [7:0] of Register 1Bh are the interrupt status bits that indicate which
interrupt conditions have occurred. The interrupt status bits are cleared after reading Register 1Bh.
Bit [14] of Register 1Fh sets the interrupt level to active high or active low. The default is active low.
The MII Management bus option gives the MAC processor complete access to the KSZ9031RNX control and status
registers. Additionally, an interrupt pin eliminates the need for the processor to poll the PHY for status change.
LED Mode
The KSZ9031RNX provides two programmable LED output pins, LED2 and LED1, which are configurable to support two
LED modes. The LED mode is configured by the LED_MODE strap-in (Pin 41). It is latched at power-up/reset and is
defined as follows:
•
•
Pull-up:
Single-LED mode
Pull-down: Tri-color dual-LED mode
Single-LED Mode
In single-LED mode, the LED2 pin indicates the link status while the LED1 pin indicates the activity status, as shown in
Table 9.
Table 9. Single-LED Mode – Pin Definition
LED Pin
LED2
LED1
Pin State
LED Definition
Link/Activity
H
OFF
Link off
L
ON
Link on (any speed)
H
OFF
No activity
Toggle
Blinking
Activity (RX, TX)
Tri-color Dual-LED Mode
In tri-color dual-LED mode, the link and activity status are indicated by the LED2 pin for 1000Base-T; by the LED1 pin for
100Base-TX; and by both LED2 and LED1 pins, working in conjunction, for 10Base-T. This is summarized in Table 10.
Table 10. Tri-color Dual-LED Mode – Pin Definition
LED Pin
LED Pin
(State)
(Definition)
Link/Activity
LED2
LED1
LED2
LED1
H
H
OFF
OFF
Link off
L
H
ON
OFF
1000 Link / No activity
Toggle
H
Blinking
OFF
1000 Link / Activity (RX, TX)
H
L
OFF
ON
H
Toggle
OFF
Blinking
L
L
ON
ON
Toggle
Toggle
Blinking
Blinking
100 Link / No activity
100 Link / Activity (RX, TX)
10 Link / No activity
10 Link / Activity (RX, TX)
Each LED output pin can directly drive an LED with a series resistor (typically 220Ω to 470Ω).
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Loopback Mode
The KSZ9031RNX supports the following loopback operations to verify analog and/or digital data paths.
•
•
Local (digital) loopback
Remote (analog) loopback
Local (Digital) Loopback
This loopback mode checks the RGMII transmit and receive data paths between KSZ9031RNX and external MAC, and is
supported for all three speeds (10/100/1000Mbps) at full-duplex.
The loopback data path is shown in Figure 5.
•
•
•
RGMII MAC transmits frames to KSZ9031RNX.
Frames are wrapped around inside KSZ9031RNX.
KSZ9031RNX transmits frames back to RGMII MAC.
Figure 5. Local (Digital) Loopback
The following programming steps and register settings are used for local loopback mode.
For 1000Mbps loopback,
•
•
Set Register 0h,
- Bit [14] = 1
- Bits [6, 13] = 10
- Bit [12] = 0
- Bit [8] = 1
Set Register 9h,
- Bit [12] = 1
- Bit [11] = 0
// Enable local loopback mode
// Select 1000Mbps speed
// Disable auto-negotiation
// Select full-duplex mode
// Enable master-slave manual configuration
// Select slave configuration (required for loopback mode)
For 10/100Mbps loopback,
•
Set Register 0h,
- Bit [14] = 1
- Bits [6, 13] = 00 / 01
- Bit [12] = 0
- Bit [8] = 1
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// Enable local loopback mode
// Select 10Mbps/100Mbps speed
// Disable auto-negotiation
// Select full-duplex mode
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KSZ9031RNX
Remote (Analog) Loopback
This loopback mode checks the line (differential pairs, transformer, RJ-45 connector, Ethernet cable) transmit and receive
data paths between KSZ9031RNX and its link partner, and is supported for 1000Base-T full-duplex mode only.
The loopback data path is shown in Figure 6.
•
•
•
The Gigabit PHY link partner transmits frames to KSZ9031RNX.
Frames are wrapped around inside KSZ9031RNX.
KSZ9031RNX transmits frames back to the Gigabit PHY link partner.
Figure 6. Remote (Analog) Loopback
The following programming steps and register settings are used for remote loopback mode.
•
Set Register 0h,
- Bits [6, 13] = 10
- Bit [12] = 0
- Bit [8] = 1
// Select 1000Mbps speed
// Disable auto-negotiation
// Select full-duplex mode
Or just auto-negotiate and link up at 1000Base-T full-duplex mode with link partner.
•
Set Register 11h,
- Bit [8] = 1
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// Enable remote loopback mode
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KSZ9031RNX
LinkMD® Cable Diagnostic
The LinkMD function uses time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems,
such as open circuits, short circuits, and impedance mismatches.
LinkMD operates by sending a pulse of known amplitude and duration down the selected differential pair, then analyzing
the polarity and shape of the reflected signal to determine the type of fault: open circuit for a positive/non-inverted
amplitude reflection and short circuit for a negative/inverted amplitude reflection. The time duration for the reflected signal
to return provides the approximate distance to the cabling fault. The LinkMD function processes this TDR information and
presents it as a numerical value that can be translated to a cable distance.
LinkMD is initiated by accessing Register 12h, the LinkMD – Cable Diagnostic register, in conjunction with Register 1Ch,
the Auto MDI/MDI-X register. The latter register is needed to disable the Auto MDI/MDI-X function before running the
LinkMD test. Additionally, a software reset (Reg. 0h, Bit [15] = 1) should be performed before and after running the
LinkMD test. The reset helps to ensure the KSZ9031RNX is in the normal operating state before and after the test.
NAND Tree Support
The KSZ9031RNX provides parametric NAND tree support for fault detection between chip I/Os and board. NAND tree
mode is enabled at power-up/reset with the MODE[3:0] strap-in pins set to ‘0100’. Table 11 lists the NAND tree pin order.
Table 11. NAND Tree Test Pin Order for KSZ9031RNX
Pin
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Description
LED2
Input
LED1/PME_N1
Input
TXD0
Input
TXD1
Input
TXD2
Input
TXD3
Input
GTX_CLK
Input
TX_EN
Input
RX_DV
Input
RX_CLK
Input
INT_N/PME_N2
Input
MDC
Input
MDIO
Input
CLK125_NDO
Output
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Power Management
The KSZ9031RNX incorporates a number of power-management modes and features that provide methods to consume
less energy. These are discussed in the following sections.
Energy-Detect Power-Down Mode
Energy-detect power-down (EDPD) mode is used to further reduce the transceiver power consumption when the cable is
unplugged. It is enabled by writing a one to MMD Address 1Ch, Register 23h, Bit [0], and is in effect when autonegotiation mode is enabled and the cable is disconnected (no link).
In EDPD Mode, the KSZ9031RNX shuts down all transceiver blocks, except for the transmitter and energy detect circuits.
Power can be reduced further by extending the time interval between the transmissions of link pulses to check for the
presence of a link partner. The periodic transmission of link pulses is needed to ensure the KSZ9031RNX and its link
partner, when operating in the same low-power state and with Auto MDI/MDI-X disabled, can wake up when the cable is
connected between them. By default, EDPD mode is disabled after power-up.
Software Power-Down Mode
This mode is used to power down the KSZ9031RNX device when it is not in use after power-up. Software power-down
(SPD) mode is enabled by writing a one to Register 0h, Bit [11]. In the SPD state, the KSZ9031RNX disables all internal
functions, except for the MII management interface. The KSZ9031RNX exits the SPD state after a zero is written to
Register 0h, Bit [11].
Chip Power-Down Mode
This mode provides the lowest power state for the KSZ9031RNX device when it is mounted on the board but not in use.
Chip power-down (CPD) mode is enabled after power-up/reset with the MODE[3:0] strap-in pins set to ‘0111’. The
KSZ9031RNX exits CPD mode after a hardware reset is applied to the RESET_N pin (Pin 42) with the MODE[3:0] strap-in
pins set to an operating mode other than CPD.
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KSZ9031RNX
Energy Efficient Ethernet (EEE)
The KSZ9031RNX implements Energy Efficient Ethernet (EEE) as described in IEEE Standard 802.3az for line signaling
by the four differential pairs (analog side) and according to the multisource agreement (MSA) of collaborating Gigabit
Ethernet chip vendors for the RGMII (digital side). This agreement is based on the IEEE Standard’s EEE implementation
for GMII (1000Mbps) and MII (100Mbps). The specification is defined around an EEE-compliant MAC on the host side and
an EEE-compliant link partner on the line side that support the special signaling associated with EEE. EEE saves power
by keeping the AC signal on the copper Ethernet cable at approximately 0V peak-to-peak as often as possible during
periods of no traffic activity, while maintaining the link-up status. This is referred to as low-power idle (LPI) mode or state.
During LPI mode, the copper link responds automatically when it receives traffic and resumes normal PHY operation
immediately, without blockage of traffic or loss of packet. This involves exiting LPI mode and returning to normal
100/1000Mbps operating mode. Wake-up times are <16µs for 1000Base-T and <30µs for 100Base-TX.The LPI state is
controlled independently for transmit and receive paths, allowing the LPI state to be active (enabled) for:
•
•
•
Transmit cable path only
Receive cable path only
Both transmit and receive cable paths
The KSZ9031RNX has the EEE function disabled as the power-up default setting. The EEE function is enabled by setting
the following EEE advertisement bits at MMD Address 7h, Register 3Ch, followed by restarting auto-negotiation (writing a
‘1’ to Register 0h, Bit [9]):
•
•
Bit [2] = 1
Bit [1] = 1
// Enable 1000Mbps EEE mode
// Enable 100Mbps EEE mode
For standard (non-EEE) 10Base-T mode, normal link pulses (NLPs) with long periods of no AC signal transmission are
used to maintain the link during the idle period when there is no traffic activity. To save more power, the KSZ9031RNX
provides the option to enable 10Base-Te mode, which saves additional power by reducing the transmitted signal
amplitude from 2.5V to 1.75V. To enable 10Base-Te mode, write a ‘1’ to MMD Address 1Ch, Register 4h, Bit [10].
During LPI mode, refresh transmissions are used to maintain the link; power savings occur in quiet periods. Approximately
every 20 to 22 milliseconds, a refresh transmission of 200 to 220 microseconds is sent to the link partner. The refresh
transmissions and quiet periods are shown in Figure 7.
Figure 7. LPI Mode (Refresh Transmissions and Quiet Periods)
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Transmit Direction Control (MAC-to-PHY)
RGMII 1000Mbps transmission from MAC-to-PHY uses both rising and falling edges of the GTX_CLK clock. The
KSZ9031RNX uses the TX_EN pin as the RGMII transmit control signal (TX_CTL) to clock in the TX_EN signal on the
rising edge and the TX_ER signal on the falling edge. It also uses the TXD[3:0] pins to clock in the TX data low nibble bits
[3:0] on the rising edge and the TX data high nibble Bits [7:4] on the falling edge.
The KSZ9031RNX enters LPI mode for the transmit direction when its attached EEE-compliant MAC de-asserts the
TX_EN signal (the TX_CTL pin outputs low on the rising edge), asserts the TX_ER signal (the TX_CTL pin outputs high
on the falling edge), and sets TX data Bits [7:0] to 0000_0001 (TXD[3:0] pins output 0001 on the rising edge and 0000 on
the falling edge). The KSZ9031RNX remains in the 1000Mbps transmit LPI state while the MAC maintains the states of
these signals. When the MAC changes any of the TX_EN, TX_ER, or TX data signals from their LPI state values, the
KSZ9031RNX exits the LPI transmit state.
To save more power, the MAC can stop the GTX_CLK clock after the RGMII signals for the LPI state have been asserted
for 10 or more GTX_CLK clock cycles.
Figure 8 shows the LPI transition for RGMII transmit in 1000Mbps mode.
Figure 8. LPI Transition – RGMII (1000Mbps) Transmit
RGMII 100Mbps transmission from MAC-to-PHY uses both rising and falling edges of the GTX_CLK clock. The
KSZ9031RNX uses the TX_EN pin as the RGMII transmit control signal (TX_CTL) to clock in the TX_EN signal on the
rising edge and the TX_ER signal on the falling edge. It also uses the TXD[3:0] pins to clock in the TX data Bits [3:0] on
the rising edge.
The KSZ9031RNX enters LPI mode for the transmit direction when its attached EEE-compliant MAC de-asserts the
TX_EN signal (the TX_CTL pin outputs low on the rising edge), asserts the TX_ER signal (the TX_CTL pin outputs high
on the falling edge), and sets TX data Bits [3:0] to 0001 (the TXD[3:0] pins output 0001). The KSZ9031RNX remains in
the 100Mbps transmit LPI state while the MAC maintains the states of these signals. When the MAC changes any of the
TX_EN, TX_ER, or TX data signals from their LPI state values, the KSZ9031RNX exits the LPI transmit state.
To save more power, the MAC can stop the GTX_CLK clock after the RGMII signals for the LPI state have been asserted
for 10 or more GTX_CLK clock cycles.
Figure 9 shows the LPI transition for RGMII transmit in 100Mbps mode.
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Figure 9. LPI Transition – RGMII (100Mbps) Transmit
Receive Direction Control (PHY-to-MAC)
RGMII 1000Mbps transmission from PHY-to-MAC uses both rising and falling edges of the RX_CLK clock. The
KSZ9031RNX uses the RX_DV pin as the RGMII receive control signal (RX_CTL) to clock out the RX_DV signal on the
rising edge and the RX_ER signal on the falling edge It also uses the RXD[3:0] pins to clock out the RX data low nibble
Bits [3:0] on the rising edge and the RX data high nibble Bits [7:4] on the falling edge.
The KSZ9031RNX enters LPI mode for the receive direction when it receives the /P/ code bit pattern (sleep/refresh) from
its EEE-compliant link partner. It then drives the RX_DV pin low on the rising clock edge and high on the falling clock edge
to de-assert the RX_DV signal and assert the RX_ER signal, respectively, to the MAC. Also, the RXD[3:0] pins are driven
to 0001 on the rising clock edge and 0000 on the falling clock edge to set the RX data Bits [7:0] to 0000_0001. The
KSZ9031RNX remains in the 1000Mbps receive LPI state while it continues to receive the refresh from its link partner, so
it will continue to maintain and drive the LPI output states for the RGMII receive output pins to inform the attached EEEcompliant MAC that it is in the receive LPI state. When the KSZ9031RNX receives a non /P/ code bit pattern (nonRefresh), it exits the receive LPI state and sets the RX_DV and RXD[3:0] output pins accordingly for a normal frame or
normal idle.
To save more power, the KSZ9031RNX stops the RX_CLK clock output to the MAC after 10 or more RX_CLK clock
cycles have occurred in the receive LPI state.
Figure 10 shows the LPI transition for RGMII receive in 1000Mbps mode.
Figure 10. LPI Transition – RGMII (1000Mbps) Receive
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KSZ9031RNX
RGMII 100Mbps transmission from PHY-to-MAC uses both rising and falling edges of the RX_CLK clock. The
KSZ9031RNX uses the RX_DV pin as the RGMII receive control signal (RX_CTL) to clock out the RX_DV signal on the
rising edge and the RX_ER signal on the falling edge. It also uses the RXD[3:0] pins to clock out the RX data Bits [3:0] on
the rising edge.
The KSZ9031RNX enters LPI mode for the receive direction when it receives the /P/ code bit pattern (sleep/refresh) from
its EEE-compliant link partner. It then drives the RX_DV pin low on the rising clock edge and high on the falling clock edge
to de-assert the RX_DV signal and assert the RX_ER signal, respectively, to the MAC. Also, the RXD[3:0] pins are driven
to 0001. The KSZ9031RNX remains in the 100Mbps receive LPI state while it continues to receive the refresh from its link
partner, so it will continue to maintain and drive the LPI output states for the RGMII receive output pins to inform the
attached EEE-compliant MAC that it is in the receive LPI state. When the KSZ9031RNX receives a non /P/ code bit
pattern (non-refresh), it exits the receive LPI state and sets the RX_DV and RXD[3:0] output pins accordingly for a normal
frame or normal idle.
The KSZ9031RNX stops the RX_CLK clock output to the MAC after 10 or more RX_CLK clock cycles have occurred in
the receive LPI state to save more power.
Figure 11 shows the LPI transition for RGMII receive in 100Mbps mode.
Figure 11. LPI Transition – RGMII (100Mbps) Receive
Registers Associated with EEE
The following MMD registers are provided for EEE configuration and management:
•
•
•
•
MMD Address 3h, Register 0h MMD Address 3h, Register 1h MMD Address 7h, Register 3Ch
MMD Address 7h, Register 3Dh
May 14, 2015
PCS EEE – Control register
PCS EEE – Status register
- EEE Advertisement register
- EEE Link Partner Advertisement register
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KSZ9031RNX
Wake-On-LAN
Wake-On-LAN (WOL) is normally a MAC-based function to wake up a host system (for example, an Ethernet end device,
such as a PC) that is in standby power mode. Wake-up is triggered by receiving and detecting a special packet
(commonly referred to as the “magic packet”) that is sent by the remote link partner. The KSZ9031RNX can perform the
same WOL function if the MAC address of its associated MAC device is entered into the KSZ9031RNX PHY registers for
magic-packet detection. When the KSZ9031RNX detects the magic packet, it wakes up the host by driving its power
management event (PME) output pin low.
By default, the WOL function is disabled. It is enabled by setting the enabling bit and configuring the associated registers
for the selected PME wake-up detection method.
The KSZ9031RNX provides three methods to trigger a PME wake-up:
•
•
•
Magic-packet detection
Customized-packet detection
Link status change detection
Magic-Packet Detection
The magic packet’s frame format starts with 6 bytes of 0xFFh and is followed by 16 repetitions of the MAC address of its
associated MAC device (local MAC device).
When the magic packet is detected from its link partner, the KSZ9031RNX asserts its PME output pin low.
The following MMD Address 2h registers are provided for magic-packet detection:
•
•
Magic-packet detection is enabled by writing a ‘1’ to MMD Address 2h, Register 10h, Bit [6]
The MAC address (for the local MAC device) is written to and stored in MMD Address 2h, Registers 11h – 13h
The KSZ9031RNX does not generate the magic packet. The magic packet must be provided by the external system.
Customized-Packet Detection
The customized packet has associated register/bit masks to select which byte, or bytes, of the first 64 bytes of the packet
to use in the CRC calculation. After the KSZ9031RNX receives the packet from its link partner, the selected bytes for the
received packet are used to calculate the CRC. The calculated CRC is compared to the expected CRC value that was
previously written to and stored in the KSZ9031RNX PHY registers. If there is a match, the KSZ9031RNX asserts its PME
output pin low.
Four customized packets are provided to support four types of wake-up scenarios. A dedicated set of registers is used to
configure and enable each customized packet.
The following MMD registers are provided for customized-packet detection:
•
•
•
Each of the four customized packets is enabled via MMD Address 2h, Register 10h,
- Bit [2]
// For customized packets, type 0
- Bit [3]
// For customized packets, type 1
- Bit [4]
// For customized packets, type 2
- Bit [5]
// For customized packets, type 3
32-bit expected CRCs are written to and stored in:
- MMD Address 2h, Registers 14h – 15h
// For customized packets, type 0
- MMD Address 2h, Registers 16h – 17h
// For customized packets, type 1
- MMD Address 2h, Registers 18h – 19h
// For customized packets, type 2
- MMD Address 2h, Registers 1Ah – 1Bh
// For customized packets, type 3
Masks to indicate which of the first 64-bytes to use in the CRC calculation are set in:
- MMD Address 2h, Registers 1Ch – 1Fh
// For customized packets, type 0
- MMD Address 2h, Registers 20h – 23h
// For customized packets, type 1
- MMD Address 2h, Registers 24h – 27h
// For customized packets, type 2
- MMD Address 2h, Registers 28h – 2Bh
// For customized packets, type 3
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KSZ9031RNX
Link Status Change Detection
If link status change detection is enabled, the KSZ9031RNX asserts its PME output pin low whenever there is a link status
change, using the following MMD Address 2h register bits and their enabled (1) or disabled (0) settings:
•
•
MMD Address 2h, Register 10h, Bit [0]
MMD Address 2h, Register 10h, Bit [1]
// For link-up detection
// For link-down detection
The PME output signal is available on either LED1/PME_N1 (Pin 17) or INT_N/PME_N2 (Pin 38), and is selected and
enabled using MMD Address 2h, Register 2h, Bits [8] and [10], respectively. Additionally, MMD Address 2h, Register 10h,
Bits [15:14] defines the output functions for Pins 17 and 38.
The PME output is active low and requires a 1kΩ pull-up to the VDDIO supply. When asserted, the PME output is cleared
by disabling the register bit that enabled the PME trigger source (magic packet, customized packet, link status change).
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KSZ9031RNX
Typical Current/Power Consumption
Table 12 through Table 15 show the typical current consumption by the core (DVDDL, AVDDL, AVDDL_PLL), transceiver
(AVDDH) and digital I/O (DVDDH) supply pins, and the total typical power for the entire KSZ9031RNX device for various
nominal operating voltage combinations.
Table 12. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (3.3V)
1.2V Core
3.3V Transceiver
(DVDDL, AVDDL,
(AVDDH)
Condition
AVDDL_PLL)
3.3V Digital I/Os
(DVDDH)
Total Chip Power
mA
mA
mA
mW
210
67.4
19.5
538
1000Base-T full-duplex @ 100% utilization
221
66.3
41.5
621
100Base-TX link-up (no traffic)
63.6
28.7
13.9
217
100Base-TX full-duplex @ 100% utilization
63.8
28.6
17.2
228
10Base-T link-up (no traffic)
7.1
15.9
11.5
99
10Base-T full-duplex @ 100% utilization
7.7
28.6
13.7
149
EEE Mode – 1000Mbps
43.5
5.7
30.6
172
EEE Mode – 100Mbps (TX and RX in LPI)
25.6
5.3
18.1
108
Software power-down mode (Reg. 0h.11 = 1)
1.0
4.2
9.3
46
1.8V Digital I/Os
(DVDDH)
Total Chip Power
1000Base-T link-up (no traffic)
Table 13. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (1.8V)
1.2V Core
3.3V Transceiver
(DVDDL, AVDDL,
(AVDDH)
Condition
AVDDL_PLL)
mA
mA
mA
mW
1000Base-T link-up (no traffic)
210
67.4
11.2
494
1000Base-T full-duplex @ 100% utilization
221
66.3
23.6
526
100Base-TX link-up (no traffic)
63.6
28.7
8.4
186
100Base-TX full-duplex @ 100% utilization
63.8
28.6
9.8
189
10Base-T link-up (no traffic)
7.1
15.9
3.6
67
10Base-T full-duplex @ 100% utilization
7.7
28.6
5.6
114
EEE Mode – 1000Mbps
43.5
5.7
15.9
100
EEE Mode – 100Mbps (TX and RX in LPI)
25.6
5.3
9.1
65
Software power-down mode (Reg. 0h.11 = 1)
1.0
4.2
5.5
25
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KSZ9031RNX
Table 14. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (2.5V)
2.5V
(4)
1.2V Core
Transceiver
(DVDDL,
(AVDDH –
Condition
AVDDL,
Commercial
AVDDL_PLL)
Temperature
Only)
2.5V Digital I/Os
(DVDDH)
Total Chip
Power
mA
mA
mA
mW
1000Base-T link-up (no traffic)
210
58.8
14.7
435
1000Base-T full-duplex @ 100% utilization
221
57.9
31.5
488
100Base-TX link-up (no traffic)
63.6
24.9
10.5
165
100Base-TX full-duplex @ 100% utilization
63.8
24.9
13.0
171
10Base-T link-up (no traffic)
7.1
11.5
6.3
53
10Base-T full-duplex @ 100% utilization
7.7
25.3
9.0
95
EEE Mode – 1000Mbps
43.5
4.5
23.6
122
EEE Mode – 100Mbps (TX and RX in LPI)
25.6
4.1
13.8
75
Software power-down mode (Reg. 0h.11 = 1)
1.0
3.1
6.7
26
1.8V Digital I/Os
(DVDDH)
Total Chip Power
Note:
4.
2.5V AVDDH is recommended for commercial temperature range (0°C to +70°C) operation only.
Table 15. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (1.8V)
2.5V
(4)
1.2V Core
Transceiver
(DVDDL,
(AVDDH –
AVDDL,
Commercial
Condition
AVDDL_PLL)
Temperature
Only)
mA
mA
mA
mW
1000Base-T link-up (no traffic)
210
58.8
11.2
419
1000Base-T full-duplex @ 100% utilization
221
57.9
23.6
452
100Base-TX link-up (no traffic)
63.6
24.9
8.4
154
100Base-TX full-duplex @ 100% utilization
63.8
24.9
9.8
156
10Base-T link-up (no traffic)
7.1
11.5
3.6
44
10Base-T full-duplex @ 100% utilization
7.7
25.3
5.6
83
EEE Mode – 1000Mbps
43.5
4.5
15.9
92
EEE Mode – 100Mbps (TX and RX in LPI)
25.6
4.1
9.1
57
Software power-down mode (Reg. 0h.11 = 1)
1.0
3.1
5.5
19
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KSZ9031RNX
Register Map
The register space within the KSZ9031RNX consists of two distinct areas.
•
•
Standard registers
// Direct register access
MDIO manageable device (MMD) registers // Indirect register access
The KSZ9031RNX supports the following standard registers.
Table 16. Standard Registers Supported by KSZ9031RNX
Register Number (Hex)
Description
IEEE-Defined Registers
0h
Basic Control
1h
Basic Status
2h
PHY Identifier 1
3h
PHY Identifier 2
4h
Auto-Negotiation Advertisement
5h
Auto-Negotiation Link Partner Ability
6h
Auto-Negotiation Expansion
7h
Auto-Negotiation Next Page
8h
Auto-Negotiation Link Partner Next Page Ability
9h
1000Base-T Control
Ah
1000Base-T Status
Bh – Ch
Dh
Reserved
MMD Access – Control
Eh
MMD Access – Register/Data
Fh
Extended Status
Vendor-Specific Registers
10h
Reserved
11h
Remote Loopback
12h
LinkMD Cable Diagnostic
13h
Digital PMA/PCS Status
14h
Reserved
15h
RXER Counter
16h – 1Ah
Reserved
1Bh
Interrupt Control/Status
1Ch
Auto MDI/MDI-X
1Dh – 1Eh
1Fh
Reserved
PHY Control
Table 17 highlights those MMD device addresses and their associated register addresses supported by the
KSZ9031RNX, which make up the indirect MMD registers.
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KSZ9031RNX
Table 17. MMD Registers Supported by KSZ9031RNX
Device Address (Hex)
Register Address (Hex)
0h
1h
2h
3h
7h
1Ch
May 14, 2015
Description
3h
AN FLP Burst Transmit – LO
4h
AN FLP Burst Transmit – HI
5Ah
1000Base-T Link-Up Time Control
0h
Common Control
1h
Strap Status
2h
Operation Mode Strap Override
3h
Operation Mode Strap Status
4h
RGMII Control Signal Pad Skew
5h
RGMII RX Data Pad Skew
6h
RGMII TX Data Pad Skew
8h
RGMII Clock Pad Skew
10h
Wake-On-LAN – Control
11h
Wake-On-LAN – Magic Packet, MAC-DA-0
12h
Wake-On-LAN – Magic Packet, MAC-DA-1
13h
Wake-On-LAN – Magic Packet, MAC-DA-2
14h
Wake-On-LAN – Customized Packet, Type 0, Expected CRC 0
15h
Wake-On-LAN – Customized Packet, Type 0, Expected CRC 1
16h
Wake-On-LAN – Customized Packet, Type 1, Expected CRC 0
17h
Wake-On-LAN – Customized Packet, Type 1, Expected CRC 1
18h
Wake-On-LAN – Customized Packet, Type 2, Expected CRC 0
19h
Wake-On-LAN – Customized Packet, Type 2, Expected CRC 1
1Ah
Wake-On-LAN – Customized Packet, Type 3, Expected CRC 0
1Bh
Wake-On-LAN – Customized Packet, Type 3, Expected CRC 1
1Ch
Wake-On-LAN – Customized Packet, Type 0, Mask 0
1Dh
Wake-On-LAN – Customized Packet, Type 0, Mask 1
1Eh
Wake-On-LAN – Customized Packet, Type 0, Mask 2
1Fh
Wake-On-LAN – Customized Packet, Type 0, Mask 3
20h
Wake-On-LAN – Customized Packet, Type 1, Mask 0
21h
Wake-On-LAN – Customized Packet, Type 1, Mask 1
22h
Wake-On-LAN – Customized Packet, Type 1, Mask 2
23h
Wake-On-LAN – Customized Packet, Type 1, Mask 3
24h
Wake-On-LAN – Customized Packet, Type 2, Mask 0
25h
Wake-On-LAN – Customized Packet, Type 2, Mask 1
26h
Wake-On-LAN – Customized Packet, Type 2, Mask 2
27h
Wake-On-LAN – Customized Packet, Type 2, Mask 3
28h
Wake-On-LAN – Customized Packet, Type 3, Mask 0
29h
Wake-On-LAN – Customized Packet, Type 3, Mask 1
2Ah
Wake-On-LAN – Customized Packet, Type 3, Mask 2
2Bh
Wake-On-LAN – Customized Packet, Type 3, Mask 3
0h
PCS EEE – Control
1h
PCS EEE – Status
3Ch
EEE Advertisement
3Dh
EEE Link Partner Advertisement
4h
Analog Control 4
23h
EDPD Control
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KSZ9031RNX
Standard Registers
Standard registers provide direct read/write access to a 32-register address space, as defined in Clause 22 of the IEEE
802.3 Specification. Within this address space, the first 16 registers (Registers 0h to Fh) are defined according to the
IEEE specification, while the remaining 16 registers (Registers 10h to 1Fh) are defined specific to the PHY vendor.
IEEE Defined Registers – Descriptions
Address
Name
Description
Mode
(5 )
Default
Register 0h – Basic Control
1 = Software PHY reset
0.15
Reset
0 = Normal operation
RW/SC
0
RW
0
RW
0
RW
1
RW
0
RW
0
RW/SC
0
RW
1
RW
0
This bit is self-cleared after a ‘1’ is written to it.
0.14
Loopback
1 = Loopback mode
0 = Normal operation
[0.6, 0.13]
[1,1] = Reserved
0.13
Speed Select
(LSB)
[1,0] = 1000Mbps
[0,1] = 100Mbps
[0,0] = 10Mbps
This bit is ignored if auto-negotiation is enabled
(Reg. 0.12 = 1).
1 = Enable auto-negotiation process
0.12
AutoNegotiation
Enable
0 = Disable auto-negotiation process
If enabled, auto-negotiation result overrides
settings in Reg. 0.13, 0.8 and 0.6.
If disabled, Auto MDI-X is also automatically
disabled. Use Register 1Ch to set MDI/MDI-X.
1 = Power-down mode
0 = Normal operation
0.11
Power-Down
When this bit is set to ‘1’, the link-down status
might not get updated in the PHY register.
Software should note link is down and should
not rely on the PHY register link status.
After this bit is changed from ‘1’ to ‘0’, an
internal global reset is automatically generated.
Wait a minimum of 1ms before read/write
access to the PHY registers.
0.10
Isolate
0.9
Restart AutoNegotiation
1 = Electrical isolation of PHY from RGMII
0 = Normal operation
1 = Restart auto-negotiation process
0 = Normal operation
This bit is self-cleared after a ‘1’ is written to it.
0.8
Duplex Mode
0.7
Reserved
1 = Full-duplex
0 = Half-duplex
Reserved
Note:
5.
RW = Read/Write.
RO = Read only.
SC = Self-cleared.
LH = Latch high.
LL = Latch low.
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KSZ9031RNX
IEEE Defined Registers – Descriptions (Continued)
Address
Name
Description
Mode
(5 )
Default
[0.6, 0.13]
[1,1] = Reserved
0.6
Speed Select
(MSB)
[1,0] = 1000Mbps
Set by MODE[3:0] strapping pins.
RW
See the Strapping Options section
for details.
RO
00_0000
RO
0
RO
1
RO
1
RO
1
RO
1
RO
00
RO
1
RO
0
RO
1
RO
0
RO/LH
0
RO
1
RO/LL
0
RO/LH
0
1 = Supports extended capability registers
RO
1
Assigned to Bits [3:18] of the organizationally
unique identifier (OUI). KENDIN
Communication’s OUI is 0010A1h.
RO
0022h
[0,1] = 100Mbps
[0,0] = 10Mbps
This bit is ignored if auto-negotiation is enabled
(Reg. 0.12 = 1).
0.5:0
Reserved
Reserved
Register 1h – Basic Status
1 = T4 capable
1.15
100Base-T4
1.14
100Base-TX
Full-Duplex
1.13
100Base-TX
Half-Duplex
1 = Capable of 100Mbps half-duplex
1.12
10Base-T
Full-Duplex
1 = Capable of 10Mbps full-duplex
1.11
10Base-T
Half-Duplex
1 = Capable of 10Mbps half-duplex
1.10:9
Reserved
Reserved
1.8
Extended
Status
1 = Extended status info in Reg. 15h.
1.7
Reserved
Reserved
1.6
No Preamble
1.5
AutoNegotiation
Complete
1.4
Remote Fault
1.3
AutoNegotiation
Ability
1.2
Link Status
1.1
Jabber Detect
1.0
Extended
Capability
0 = Not T4 capable
1 = Capable of 100Mbps full-duplex
0 = Not capable of 100Mbps full-duplex
0 = Not capable of 100Mbps half-duplex
0 = Not capable of 10Mbps full-duplex
0 = Not capable of 10Mbps half-duplex
0 = No extended status info in Reg. 15h.
1 = Preamble suppression
0 = Normal preamble
1 = Auto-negotiation process completed
0 = Auto-negotiation process not completed
1 = Remote fault
0 = No remote fault
1 = Can perform auto-negotiation
0 = Cannot perform auto-negotiation
1 = Link is up
0 = Link is down
1 = Jabber detected
0 = Jabber not detected (default is low)
Register 2h – PHY Identifier 1
2.15:0
May 14, 2015
PHY ID
Number
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KSZ9031RNX
IEEE Defined Registers – Descriptions (Continued)
Address
Name
Description
Mode
(5 )
Default
Register 3h – PHY Identifier 2
3.15:10
PHY ID
Number
Assigned to Bits [19:24] of the organizationally
unique identifier (OUI). KENDIN
Communication’s OUI is 0010A1h.
RO
0001_01
3.9:4
Model Number
Six-bit manufacturer’s model number
RO
10_0010
3.3:0
Revision
Number
Four-bit manufacturer’s revision number
RO
Indicates silicon revision
RW
0
RO
0
RW
0
RO
0
RW
00
RO
0
RW
1
RW
1
RW
1
RW
1
RW
0_0001
RO
0
RO
0
RO
0
RO
0
Register 4h – Auto-Negotiation Advertisement
4.15
Next Page
4.14
Reserved
4.13
Remote Fault
4.12
Reserved
1 = Next page capable
0 = No next page capability
Reserved
1 = Remote fault supported
0 = No remote fault
Reserved
[4.11, 4.10]
[0,0] = No pause
4.11:10
Pause
[1,0] = Asymmetric pause (link partner)
[0,1] = Symmetric pause
[1,1] = Symmetric and asymmetric pause
(local device)
1 = T4 capable
4.9
100Base-T4
4.8
100Base-TX
Full-Duplex
4.7
100Base-TX
Half-Duplex
1 = 100Mbps half-duplex capable
4.6
10Base-T
Full-Duplex
1 = 10Mbps full-duplex capable
4.5
10Base-T
Half-Duplex
1 = 10Mbps half-duplex capable
4.4:0
Selector Field
[00001] = IEEE 802.3
0 = No T4 capability
1 = 100Mbps full-duplex capable
0 = No 100Mbps full-duplex capability
0 = No 100Mbps half-duplex capability
0 = No 10Mbps full-duplex capability
0 = No 10Mbps half-duplex capability
Register 5h – Auto-Negotiation Link Partner Ability
5.15
Next Page
5.14
Acknowledge
5.13
Remote Fault
5.12
Reserved
May 14, 2015
1 = Next page capable
0 = No next page capability
1 = Link code word received from partner
0 = Link code word not yet received
1 = Remote fault detected
0 = No remote fault
Reserved
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KSZ9031RNX
IEEE Defined Registers – Descriptions (Continued)
Address
Name
Description
Mode
(5 )
Default
[5.11, 5.10]
[0,0] = No pause
5.11:10
Pause
[1,0] = Asymmetric pause (link partner)
RW
00
RO
0
RO
0
RO
0
RO
0
RO
0
RO
0_0000
RO
0000_0000_000
RO/LH
0
RO
0
RO
1
RO/LH
0
RO
0
RW
0
RO
0
RW
1
RW
0
RO
0
[0,1] = Symmetric pause
[1,1] = Symmetric and asymmetric pause
(local device)
1 = T4 capable
5.9
100Base-T4
5.8
100Base-TX
Full-Duplex
5.7
100Base-TX
Half-Duplex
1 = 100Mbps half-duplex capable
5.6
10Base-T
Full-Duplex
1 = 10Mbps full-duplex capable
5.5
10Base-T
Half-Duplex
1 = 10Mbps half-duplex capable
5.4:0
Selector Field
[00001] = IEEE 802.3
0 = No T4 capability
1 = 100Mbps full-duplex capable
0 = No 100Mbps full-duplex capability
0 = No 100Mbps half-duplex capability
0 = No 10Mbps full-duplex capability
0 = No 10Mbps half-duplex capability
Register 6h – Auto-Negotiation Expansion
6.15:5
Reserved
Reserved
6.4
Parallel
Detection Fault
1 = Fault detected by parallel detection
Link Partner
Next Page
Able
1 = Link partner has next page capability
6.3
6.2
Next Page
Able
6.1
Page Received
6.0
Link Partner
AutoNegotiation
Able
0 = No fault detected by parallel detection
0 = Link partner does not have next page
capability
1 = Local device has next page capability
0 = Local device does not have next page
capability
1 = New page received
0 = New page not received
1 = Link partner has auto-negotiation capability
0 = Link partner does not have auto-negotiation
capability
Register 7h – Auto-Negotiation Next Page
7.15
Next Page
7.14
Reserved
7.13
Message Page
7.12
Acknowledge2
7.11
Toggle
1 = Additional next pages will follow
0 = Last page
Reserved
1 = Message page
0 = Unformatted page
1 = Will comply with message
0 = Cannot comply with message
1 = Previous value of the transmitted link code
word equaled logic one
0 = Logic zero
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KSZ9031RNX
IEEE Defined Registers – Descriptions (Continued)
Address
Name
Description
7.10:0
Message Field
Mode
11-bit wide field to encode 2048 messages
(5 )
Default
RW
000_0000_0001
RO
0
RO
0
RO
0
RO
0
RO
0
RO
000_0000_0000
RW
000
RW
0
Register 8h – Auto-Negotiation Link Partner Next Page Ability
8.15
Next Page
8.14
Acknowledge
8.13
Message Page
8.12
Acknowledge2
8.11
Toggle
8.10:0
Message Field
1 = Additional next pages will follow
0 = Last page
1 = Successful receipt of link word
0 = No successful receipt of link word
1 = Message page
0 = Unformatted page
1 = Able to act on the information
0 = Not able to act on the information
1 = Previous value of transmitted link code
word equal to logic zero
0 = Previous value of transmitted link code
word equal to logic one
Register 9h – 1000Base-T Control
Transmitter test mode operations
[9.15:13]
9.15:13
Test Mode Bits
Mode
[000]
Normal operation
[001]
Test mode 1 –Transmit waveform
test
[010]
Test mode 2 –Transmit jitter test
in master mode
[011]
Test mode 3 –Transmit jitter test
in slave mode
[100]
Test mode 4 –Transmitter
distortion test
[101]
Reserved, operations not
identified
[110]
Reserved, operations not
identified
[111]
Reserved, operations not
identified
To enable 1000Base-T Test Mode:
1) Set Register 0h = 0x0140 to disable autonegotiation and select 1000Mbps speed.
2) Set Register 9h, bits [15:13] = 001, 010, 011,
or 100 to select one of the 1000Base-T Test
Modes.
After the above settings, the test waveform for
the selected test mode is transmitted onto each
of the 4 differential pairs. No link partner is
needed.
9.12
May 14, 2015
Master-Slave
Manual
Configuration
Enable
1 = Enable master-slave manual configuration
value
0 = Disable master-slave manual configuration
value
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KSZ9031RNX
IEEE Defined Registers – Descriptions (Continued)
Address
Name
9.11
Master-Slave
Manual
Configuration
Value
Description
Mode
(5 )
Default
1 = Configure PHY as master during masterslave negotiation
0 = Configure PHY as slave during masterslave negotiation
RW
0
RW
0
RW
1
This bit is ignored if master-slave manual
configuration is disabled (Reg. 9.12 = 0).
1 = Indicate the preference to operate as
multiport device (master)
9.10
Port Type
0 = Indicate the preference to operate as singleport device (slave)
This bit is valid only if master-slave manual
configuration is disabled (Reg. 9.12 = 0).
9.9
1000Base-T
Full-Duplex
9.8
1000Base-T
Half-Duplex
9.7:0
Reserved
1 = Advertise PHY is 1000Base-T full-duplex
capable
0 = Advertise PHY is not 1000Base-T fullduplex capable
1 = Advertise PHY is 1000Base-T half-duplex
capable
0 = Advertise PHY is not 1000Base-T
half-duplex capable
Write as 0, ignore on read
Set by MODE[3:0] strapping pins.
RW
See the Strapping Options section
for details.
RO
–
RO/LH/SC
0
RO
0
RO
0
RO
0
RO
0
RO
0
Register Ah – 1000Base-T Status
1 = Master-slave configuration fault detected
A.15
Master-Slave
Configuration
Fault
A.14
Master-Slave
Configuration
Resolution
A.13
Local Receiver
Status
1 = Local receiver OK (loc_rcvr_status = 1)
Remote
Receiver
Status
1 = Remote receiver OK (rem_rcvr_status = 1)
A.12
A.11
Link Partner
1000Base-T
Full-Duplex
Capability
1 = Link partner is capable of 1000Base-T fullduplex
A.10
Link Partner
1000Base-T
Half-Duplex
Capability
0 = Link Partner is not capable of 1000Base-T
half-duplex
A.9:8
Reserved
Reserved
RO
00
Cumulative count of errors detected when
receiver is receiving idles and
PMA_TXMODE.indicate = SEND_N.
RO/SC
0000_0000
A.7:0
May 14, 2015
Idle Error
Count
0 = No master-slave configuration fault
detected
1 = Local PHY configuration resolved to
master
0 = Local PHY configuration resolved to
slave
0 = Local receiver not OK (loc_rcvr_status = 0)
0 = Remote receiver not OK (rem_rcvr_status
= 0)
0 = Link partner is not capable of 1000Base-T
full-duplex
1 = Link partner is capable of 1000Base-T halfduplex
The counter is incremented every symbol
period that rxerror_status = ERROR.
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KSZ9031RNX
IEEE Defined Registers – Descriptions (Continued)
Address
Name
Description
Mode
(6 )
Default
Register Dh – MMD Access – Control
D.15:14
MMD –
Operation
Mode
For the selected MMD device address (Bits [4:0]
of this register), these two bits select one of the
following register or data operations and the
usage for MMD Access – Register/Data (Reg.
Eh).
00 = Register
RW
00
01 = Data, no post increment
10 = Data, post increment on reads and writes
11 = Data, post increment on writes only
D.13:5
Reserved
Reserved
RW
00_0000_000
D.4:0
MMD –
Device
Address
These five bits set the MMD device address.
RW
0_0000
RW
0000_0000_0000_0000
RO
0
RO
0
RO
1
RO
1
Register Eh – MMD Access – Register/Data
For the selected MMD device address (Reg.
Dh, Bits [4:0]),
E.15:0
MMD –
Register/Data
When Reg. Dh, Bits [15:14] = 00, this
register contains the read/write register
address for the MMD device address.
Otherwise, this register contains the
read/write data value for the MMD device
address and its selected register address.
See also Reg. Dh, Bits [15:14], for descriptions
of post increment reads and writes of this
register for data operation.
Register Fh – Extended Status
F.15
1000Base-X
Full-Duplex
F.14
1000Base-X
Half-Duplex
F.13
1000Base-T
Full-Duplex
F.12
1000Base-T
Half-Duplex
1 = PHY can perform 1000Base-X
full-duplex
0 = PHY cannot perform 1000Base-X
full-duplex
1 = PHY can perform 1000Base-X
half-duplex
0 = PHY cannot perform 1000Base-X
half-duplex
1 = PHY can perform 1000Base-T
full-duplex
0 = PHY cannot perform 1000Base-T
full-duplex
1 = PHY can perform 1000Base-T
half-duplex
0 = PHY cannot perform 1000Base-T
half-duplex
Note:
6.
RW = Read/Write.
RC = Read-cleared
RO = Read only.
SC = Self-cleared.
LH = Latch high.
May 14, 2015
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KSZ9031RNX
Vendor-Specific Registers – Descriptions
Address
Name
Description
F.11:0
Reserved
Mode
Ignore when read
(6 )
Default
RO
–
RW
0000_000
RW
0
Register 11h – Remote Loopback
11.15:9
Reserved
Reserved
11.8
Remote
Loopback
1 = Enable remote loopback
11.7:1
Reserved
Reserved
RW
1111_010
11.0
Reserved
Reserved
RO
0
RW/SC
0
RW
0
RW
00
RW
00
RO
00
RO
0000_0000
0 = Disable remote loopback
Register 12h – LinkMD – Cable Diagnostic
Write value:
1 = Enable cable diagnostic test. After test
has completed, this bit is self-cleared.
12.15
Cable
Diagnostic
Test Enable
0 = Disable cable diagnostic test.
Read value:
1 = Cable diagnostic test is in progress.
0 = Indicates cable diagnostic test (if enabled)
has completed and the status information
is valid for read.
12.14
Reserved
This bit should always be set to ‘0’.
These two bits select the differential pair for
testing:
12.13:12
Cable
Diagnostic
Test Pair
00 = Differential pair A (Pins 2, 3)
01 = Differential pair B (Pins 5, 6)
10 = Differential pair C (Pins 7, 8)
11 = Differential pair D (Pins 10, 11)
12.11:10
12.9:8
Reserved
Cable
Diagnostic
Status
These two bits should always be set to ‘00’.
These two bits represent the test result for the
selected differential pair in Bits [13:12] of this
register.
00 = Normal cable condition (no fault detected)
01 = Open cable fault detected
10 = Short cable fault detected
11 = Reserved
12.7:0
May 14, 2015
Cable
Diagnostic
Fault Data
For the open or short cable fault detected in Bits
[9:8] of this register, this 8-bit value represents
the distance to the cable fault.
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Vendor-Specific Registers – Descriptions (Continued)
Address
Name
Description
Mode
(6 )
Default
Register 13h – Digital PMA/PCS Status
13.15:3
Reserved
13.2
1000Base-T
Link Status
Reserved
RO/LH
0000_0000_0000_0
RO
0
RO
0
Reserved
RO
0
Receive error counter for symbol error frames
RO/RC
0000_0000_0000_0000
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RO/RC
0
RO/RC
0
RO/RC
0
RO/RC
0
1000Base-T link status
1 = Link status is OK
0 = Link status is not OK
100Base-TX link status
13.1
100Base-TX
Link Status
13.0
Reserved
1 = Link status is OK
0 = Link status is not OK
Register 15h – RXER Counter
15.15:0
RXER Counter
Register 1Bh – Interrupt Control/Status
1B.15
Jabber
Interrupt
Enable
1 = Enable jabber interrupt
1B.14
Receive Error
Interrupt
Enable
1 = Enable receive error interrupt
1B.13
Page Received
Interrupt
Enable
1 = Enable page received interrupt
1B.12
Parallel Detect
Fault Interrupt
Enable
1 = Enable parallel detect fault interrupt
1B.11
Link Partner
Acknowledge
Interrupt
Enable
1B.10
Link-Down
Interrupt
Enable
1 = Enable link-down interrupt
1B.9
Remote Fault
Interrupt
Enable
1 = Enable remote fault interrupt
1B.8
Link-Up
Interrupt
Enable
1 = Enable link-up interrupt
1B.7
Jabber
Interrupt
1 = Jabber occurred
1B.6
Receive Error
Interrupt
1 = Receive error occurred
1B.5
Page Receive
Interrupt
1 = Page receive occurred
1B.4
Parallel Detect
Fault Interrupt
1 = Parallel detect fault occurred
May 14, 2015
0 = Disable jabber interrupt
0 = Disable receive error interrupt
0 = Disable page received interrupt
0 = Disable parallel detect fault interrupt
1 = Enable link partner acknowledge interrupt
0 = Disable link partner acknowledge interrupt
0 = Disable link-down interrupt
0 = Disable remote fault interrupt
0 = Disable link-up interrupt
0 = Jabber did not occur
0 = Receive error did not occur
0 = Page receive did not occur
0 = Parallel detect fault did not occur
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KSZ9031RNX
Vendor-Specific Registers – Descriptions (Continued)
Address
Name
Description
1B.3
Link Partner
Acknowledge
Interrupt
1B.2
Link-Down
Interrupt
1 = Link-down occurred
1B.1
Remote Fault
Interrupt
1 = Remote fault occurred
1B.0
Link-Up
Interrupt
1 = Link-up occurred
Mode
1 = Link partner acknowledge occurred
(6 )
Default
RO/RC
0
RO/RC
0
RO/RC
0
RO/RC
0
RW
0000_0000
RW
0
RW
0
Reserved
RW
00_0000
Reserved
RW
0
RW
0
0 = Link partner acknowledge did not occur
0 = Link-down did not occur
0 = Remote fault did not occur
0 = Link-up did not occur
Register 1Ch – Auto MDI/MDI-X
1C.15:8
Reserved
Reserved
When Swap-Off (Bit [6] of this register) is
asserted (1),
1C.7
MDI Set
1 = PHY is set to operate as MDI mode
0 = PHY is set to operate as MDI-X mode
This bit has no function when Swap-Off is deasserted (0).
1C.6
Swap-Off
1C.5:0
Reserved
1 = Disable Auto MDI/MDI-X function
0 = Enable Auto MDI/MDI-X function
Register 1Fh – PHY Control
1F.15
Reserved
1 = Interrupt pin active high
1F.14
Interrupt Level
1F.13:12
Reserved
Reserved
RW
00
1F.11:10
Reserved
Reserved
RO/LH/RC
00
1F.9
Enable Jabber
RW
1
1F.8:7
Reserved
Reserved
RW
00
1F.6
Speed Status
1000Base-T
1 = Indicate chip final speed status at
1000Base-T
RO
0
1F.5
Speed Status
100Base-TX
1 = Indicate chip final speed status at
100Base-TX
RO
0
1F.4
Speed Status
10Base-T
1 = Indicate chip final speed status at
10Base-T
RO
0
RO
0
RO
0
RW
0
RO
0
0 = Interrupt pin active low
1 = Enable jabber counter
0 = Disable jabber counter
Indicate chip duplex status
1F.3
Duplex Status
1 = Full-duplex
0 = Half-duplex
Indicate chip master/slave status
1000Base-T
Master/Slave
Status
1 = 1000Base-T master mode
1F.1
Reserved
Reserved
1F.0
Link Status
Check Fail
0 = Not failing
1F.2
May 14, 2015
0 = 1000Base-T slave mode
1 = Fail
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KSZ9031RNX
MMD Registers
MMD registers provide indirect read/write access to up to 32 MMD device addresses with each device supporting up to
65,536 16-bit registers, as defined in Clause 22 of the IEEE 802.3 Specification. The KSZ9031RNX, however, uses only a
small fraction of the available registers. See the Register Map section for a list of supported MMD device addresses and
their associated register addresses.
The following two standard registers serve as the portal registers to access the indirect MMD registers.
•
•
Standard Register Dh – MMD Access – Control
Standard Register Eh – MMD Access – Register/Data
Table 18. Portal Registers (Access to Indirect MMD Registers)
Address
Name
Description
Mode
Default
RW
00
Register Dh – MMD Access – Control
D.15:14
MMD –
Operation
Mode
For the selected MMD device address (Bits
[4:0] of this register), these two bits select one
of the following register or data operations and
the usage for MMD Access – Register/Data
(Reg. Eh).
00 = Register
01 = Data, no post increment
10 = Data, post increment on reads and writes
11 = Data, post increment on writes only
D.13:5
Reserved
Reserved
RW
00_0000_000
D.4:0
MMD –
Device
Address
These five bits set the MMD device address.
RW
0_0000
RW
0000_0000_0000_0000
Register Eh – MMD Access – Register/Data
For the selected MMD device address (Reg.
Dh, Bits [4:0]),
E.15:0
MMD –
Register/Data
When Reg. Dh, Bits [15:14] = 00, this
register contains the read/write register
address for the MMD device address.
Otherwise, this register contains the
read/write data value for the MMD device
address and its selected register address.
See also Register Dh, Bits [15:14] descriptions
for post increment reads and writes of this
register for data operation.
Examples:
•
MMD Register Write
Write MMD – Device Address 2h, Register 10h = 0001h to enable link-up detection to trigger PME for WOL.
1. Write Register Dh with 0002h
// Set up register address for MMD – Device Address 2h.
2. Write Register Eh with 0010h
// Select Register 10h of MMD – Device Address 2h.
3. Write Register Dh with 4002h
// Select register data for MMD – Device Address 2h, Register 10h.
4. Write Register Eh with 0001h
// Write value 0001h to MMD – Device Address 2h, Register 10h.
May 14, 2015
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Revision 2.2
Micrel, Inc.
•
KSZ9031RNX
MMD Register Read
Read MMD – Device Address 2h, Register 11h – 13h for the magic packet’s MAC address
1. Write Register Dh with 0002h
// Set up register address for MMD – Device Address 2h.
2. Write Register Eh with 0011h
// Select Register 11h of MMD – Device Address 2h.
3. Write Register Dh with 8002h
// Select register data for MMD – Device Address 2h, Register 11h.
4. Read Register Eh
// Read data in MMD – Device Address 2h, Register 11h.
5. Read Register Eh
// Read data in MMD – Device Address 2h, Register 12h.
6. Read Register Eh
// Read data in MMD – Device Address 2h, Register 13h.
MMD Registers – Descriptions
Address
Name
(7)
Description
Mode
Default
RW
0x4000
RW
0x0003
RW
1_0000
RW
100
RW
0
MMD Address 0h, Register 3h – AN FLP Burst Transmit – LO
0.3.15:0
AN FLP Burst
Transmit – LO
This register and the following register set the
Auto-Negotiation FLP burst transmit timing. The
same timing must be set for both registers.
0x4000 = Select 8ms interval timing (default)
0x1A80 = Select 16ms interval timing
All other values are reserved.
MMD Address 0h, Register 4h – AN FLP Burst Transmit – HI
0.4.15:0
AN FLP Burst
Transmit – HI
This register and the previous register set the
Auto-Negotiation FLP burst transmit timing. The
same timing must be set for both registers.
0x0003 = Select 8ms interval timing (default)
0x0006 = Select 16ms interval timing
All other values are reserved.
MMD Address 1h, Register 5Ah – 1000Base-T Link-Up Time Control
1.5A.8:4
Reserved
Reserved
When the link partner is another KSZ9031
device, the 1000Base-T link-up time can be
long. These three bits provide an optional
setting to reduce the 1000Base-T link-up time.
100 = Default power-up setting
1.5A.3:1
1000Base-T
Link-Up Time
011 = Optional setting to reduce link-up time
when the link partner is a KSZ9031
device.
All other settings are reserved and should not
be used.
The optional setting is safe to use with any link
partner.
Note: Read/Write access to this register bit is
available only when Reg. 0h is set to 0x2100 to
disable auto-negotiation and force 100Base-TX
mode.
1.5A.0
Reserved
Reserved
Note:
7.
RW = Read/Write.
RO = Read only.
WO = Write only.
LH = Latch high.
May 14, 2015
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KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 2h, Register 0h – Common Control
2.0.15:5
Reserved
Reserved
RW
0000_0000_000
WO
0
Override strap-in for LED_MODE
1 = Single-LED mode
2.0.4
LED Mode
Override
0 = Tri-color dual-LED mode
This bit is write-only and always reads back a
value of ‘0’. The updated value is reflected in Bit
[3] of this register.
Set by LED_MODE strapping pin.
LED_MODE Status
2.0.3
LED Mode
Status
1 = Single-LED mode
RO
0 = Tri-color dual-LED mode
2.0.2
Reserved
2.0.1
CLK125_EN
Status
Can be updated by Bit [4] of this
register after reset.
Reserved
RW
Override strap-in for CLK125_EN
Reserved
0
Set by CLK125_EN strapping pin.
1 = CLK125_EN strap-in is enabled
RW
See the Strapping Options section
for details.
RW
0
RO
0000_0000
0 = CLK125_EN strap-in is disabled
2.0.0
See the Strapping Options section
for details.
Reserved
MMD Address 2h, Register 1h – Strap Status
2.1.15:8
Reserved
2.1.7
LED_MODE
Strap-In Status
Reserved
Strap to
Set by LED_MODE strapping pin.
1 = Single-LED mode
RO
See the Strapping Options section
for details.
RO
0
0 = Tri-color dual-LED mode
2.1.6
Reserved
Reserved
Strap to
2.1.5
CLK125_EN
Strap-In Status
Set by CLK125_EN strapping pin.
1 = CLK125_EN strap-in is enabled
RO
See the Strapping Options section
for details.
RO
00
0 = CLK125_EN strap-in is disabled
2.1.4:3
Reserved
Reserved
2.1.2:0
PHYAD[2:0]
Strap-In Value
Strap-in value for PHY address
May 14, 2015
Set by PHYAD[2:0] strapping pin.
Bits [4:3] of PHY address are always set to ‘00’.
56
RO
See the Strapping Options section
for details.
Revision 2.2
Micrel, Inc.
KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 2h, Register 2h – Operation Mode Strap Override
2.2.15
RGMII All
Capabilities
Override
1 = Override strap-in for RGMII to advertise all
capabilities
RW
2.2.14
RGMII No
1000BT_HD
Override
1 = Override strap-in for RGMII to advertise all
capabilities except 1000Base-T half-duplex
RW
2.2.13
RGMII
1000BT_H/FD
Only Override
1 = Override strap-in for RGMII to advertise
1000Base-T full- and half-duplex only
RW
2.2.12
RGMII
1000BT_FD
Only Override
1 = Override strap-in for RGMII to advertise
1000Base-T full-duplex only
RW
2.2.11
Reserved
Reserved
RW
0
RW
0
RW
0
RW
0
Set by MODE[3:0] strapping pin.
See the Strapping Options section
for details.
For INT_N/PME_N2 (Pin 38),
1 = Enable PME output
2.2.10
2.2.9
PME_N2
Output Enable
0 = Disable PME output
Reserved
Reserved
This bit works in conjunction with MMD Address
2h, Reg. 10h, Bits [15:14] to define the output
for Pin 38.
For LED1/PME_N1 (Pin 17),
1 = Enable PME output
PME_N1
Output Enable
0 = Disable PME output
2.2.7
Chip PowerDown Override
1 = Override strap-in for chip power-down mode
RW
See the Strapping Options section
for details.
2.2.6:5
Reserved
Reserved
RW
00
2.2.4
NAND Tree
Override
1 = Override strap-in for NAND Tree mode
RW
See the Strapping Options section
for details.
2.2.3:0
Reserved
Reserved
RW
0000
2.2.8
May 14, 2015
This bit works in conjunction with MMD Address
2h, Reg. 10h, Bits [15:14] to define the output
for Pin 17.
Set by MODE[3:0] strapping pin.
Set by MODE[3:0] strapping pin.
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KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 2h, Register 3h – Operation Mode Strap Status
2.3.15
RGMII All
Capabilities
Strap-In Status
1 = Strap to RGMII to advertise all capabilities
RO
2.3.14
RGMII No
1000BT_HD
Strap-In Status
1 = Strap to RGMII to advertise all capabilities
except 1000Base-T half-duplex
RO
2.3.13
RGMII Only
1000BT_H/FD
Strap-In Status
1 = Strap to RGMII to advertise 1000Base-T
full-and half-duplex only
RO
2.3.12
RGMII Only
1000BT_FD
Strap-In Status
1 = Strap to RGMII to advertise 1000Base-T
full-duplex only
RO
2.3.11:8
Reserved
Reserved
RO
2.3.7
Chip PowerDown Strap-In
Status
1 = Strap to chip power-down mode
RO
See the Strapping Options section
for details.
2.3.6:5
Reserved
Reserved
RO
00
2.3.4
NAND Tree
Strap-In Status
1 = Strap to NAND Tree mode
RO
See the Strapping Options section
for details.
2.3.3:0
Reserved
Reserved
RO
0000
Set by MODE[3:0] strapping pin.
See the Strapping Options section
for details.
0000
Set by MODE[3:0] strapping pin.
Set by MODE[3:0] strapping pin.
MMD Address 2h, Register 4h – RGMII Control Signal Pad Skew
2.4.15:8
Reserved
Reserved
RW
0000_0000
2.4.7:4
RX_DV Pad
Skew
RGMII RX_CTL output pad skew control
(0.06ns/step)
RW
0111
2.4.3:0
TX_EN Pad
Skew
RGMII TX_CTL input pad skew control
(0.06ns/step)
RW
0111
MMD Address 2h, Register 5h – RGMII RX Data Pad Skew
2.5.15:12
RXD3 Pad
Skew
RGMII RXD3 output pad skew control
(0.06ns/step)
RW
0111
2.5.11:8
RXD2 Pad
Skew
RGMII RXD2 output pad skew control
(0.06ns/step)
RW
0111
2.5.7:4
RXD1 Pad
Skew
RGMII RXD1 output pad skew control
(0.06ns/step)
RW
0111
2.5.3:0
RXD0 Pad
Skew
RGMII RXD0 output pad skew control
(0.06ns/step)
RW
0111
May 14, 2015
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 2h, Register 6h – RGMII TX Data Pad Skew
2.6.15:12
TXD3 Pad
Skew
RGMII TXD3 input pad skew control
(0.06ns/step)
RW
0111
2.6.11:8
TXD2 Pad
Skew
RGMII TXD2 input pad skew control
(0.06ns/step)
RW
0111
2.6.7:4
TXD1 Pad
Skew
RGMII TXD1 input pad skew control
(0.06ns/step)
RW
0111
2.6.3:0
TXD0 Pad
Skew
RGMII TXD0 input pad skew control
(0.06ns/step)
RW
0111
MMD Address 2h, Register 8h – RGMII Clock Pad Skew
2.8.15:10
Reserved
Reserved
RW
0000_00
2.8.9:5
GTX_CLK
Pad Skew
RGMII GTX_CLK input pad skew control
(0.06ns/step)
RW
01_111
2.8.4:0
RX_CLK
Pad Skew
RGMII RX_CLK output pad skew control
(0.06ns/step)
RW
0_1111
RW
00
RW
00_0000_0
RW
0
RW
0
RW
0
MMD Address 2h, Register 10h – Wake-On-LAN – Control
These two bits work in conjunction with MMD
Address 2h, Reg. 2h, Bits [8] and [10] for
PME_N1 and PME_N2 enable, to define the
output for Pins 17 and 38, respectively.
LED1/PME_N1 (Pin 17)
00 = PME_N1 output only
2.10.15:14
PME Output
Select
01 = LED1 output only
10 = LED1 and PME_N1 output
11 = Reserved
INT_N/PME_N2 (Pin 38)
00 = PME_N2 output only
01 = INT_N output only
10 = INT_N and PME_N2 output
11 = Reserved
2.10.13:7
Reserved
Reserved
2.10.6
Magic Packet
Detect Enable
1 = Enable magic-packet detection
2.10.5
CustomPacket Type 3
Detect Enable
1 = Enable custom-packet, Type 3 detection
2.10.4
CustomPacket Type 2
Detect Enable
May 14, 2015
0 = Disable magic-packet detection
0 = Disable custom-packet, Type 3 detection
1 = Enable custom-packet, Type 2 detection
0 = Disable custom-packet, Type 2 detection
59
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KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
2.10.3
CustomPacket Type 1
Detect Enable
0 = Disable custom-packet, Type 1 detection
2.10.2
CustomPacket Type 0
Detect Enable
0 = Disable custom-packet, Type 0 detection
2.10.1
Link-Down
Detect Enable
1 = Enable link-down detection
2.10.0
Link-Up Detect
Enable
1 = Enable link-up detection
Mode
1 = Enable custom-packet, Type 1 detection
1 = Enable custom-packet, Type 0 detection
0 = Disable link-down detection
0 = Disable link-up detection
(7 )
Default
RW
0
RW
0
RW
0
RW
0
RW
0000_0000_0000_0000
RW
0000_0000_0000_0000
RW
0000_0000_0000_0000
MMD Address 2h, Register 11h – Wake-On-LAN – Magic Packet, MAC-DA-0
This register stores the lower two bytes of the
destination MAC address for the magic packet.
2.11.15:0
Magic Packet
MAC-DA-0
Bit [15:8] = Byte 2 (MAC Address [15:8])
Bit [7:0]
= Byte 1 (MAC Address [7:0])
The upper four bytes of the destination MAC
address are stored in the following two
registers.
MMD Address 2h, Register 12h – Wake-On-LAN – Magic Packet, MAC-DA-1
This register stores the middle two bytes of the
destination MAC address for the magic packet.
2.12.15:0
Magic Packet
MAC-DA-1
Bit [15:8] = Byte 4 (MAC Address [31:24])
Bit [7:0]
= Byte 3 (MAC Address [23:16])
The lower two bytes and upper two bytes of the
destination MAC address are stored in the
previous and following registers, respectively.
MMD Address 2h, Register 13h – Wake-On-LAN – Magic Packet, MAC-DA-2
This register stores the upper two bytes of the
destination MAC address for the magic packet.
2.13.15:0
Magic Packet
MAC-DA-2
Bit [15:8] = Byte 6 (MAC Address [47:40])
Bit [7:0] = Byte 5 (MAC Address [39:32])
The lower four bytes of the destination MAC
address are stored in the previous two
registers.
MMD Address 2h, Register 14h – Wake-On-LAN – Customized Packet, Type 0, Expected CRC 0
MMD Address 2h, Register 16h – Wake-On-LAN – Customized Packet, Type 1, Expected CRC 0
MMD Address 2h, Register 18h – Wake-On-LAN – Customized Packet, Type 2, Expected CRC 0
MMD Address 2h, Register 1Ah – Wake-On-LAN – Customized Packet, Type 3, Expected CRC 0
This register stores the lower two bytes for the
expected CRC.
2.14.15:0
2.16.15:0
2.18.15:0
2.1A.15:0
May 14, 2015
Custom Packet
Type X
CRC 0
Bit [15:8] = Byte 2 (CRC [15:8])
RW
Bit [7:0] = Byte 1 (CRC [7:0])
0000_0000_0000_0000
The upper two bytes for the expected CRC are
stored in the following register.
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Micrel, Inc.
KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 2h, Register 15h – Wake-On-LAN – Customized Packet, Type 0, Expected CRC 1
MMD Address 2h, Register 17h – Wake-On-LAN – Customized Packet, Type 1, Expected CRC 1
MMD Address 2h, Register 19h – Wake-On-LAN – Customized Packet, Type 2, Expected CRC 1
MMD Address 2h, Register 1Bh – Wake-On-LAN – Customized Packet, Type 3, Expected CRC 1
This register stores the upper two bytes for the
expected CRC.
2.15.15:0
2.17.15:0
2.19.15:0
Custom Packet
Type X
CRC 1
2.1B.15:0
Bit [15:8] = Byte 4 (CRC [31:24])
Bit [7:0]
= Byte 3 (CRC [23:16])
RW
0000_0000_0000_0000
The lower two bytes for the expected CRC are
stored in the previous register.
MMD Address 2h, Register 1Ch – Wake-On-LAN – Customized Packet, Type 0, Mask 0
MMD Address 2h, Register 20h – Wake-On-LAN – Customized Packet, Type 1, Mask 0
MMD Address 2h, Register 24h – Wake-On-LAN – Customized Packet, Type 2, Mask 0
MMD Address 2h, Register 28h – Wake-On-LAN – Customized Packet, Type 3, Mask 0
This register selects the bytes in the first 16
bytes of the packet (bytes 1 thru 16) that will be
used for CRC calculation.
For each bit in this register,
1 = Byte is selected for CRC calculation
2.1C.15:0
2.20.15:0
2.24.15:0
Custom Packet
Type X
Mask 0
2.28.15:0
0 = Byte is not selected for CRC calculation
The register-bit to packet-byte mapping is as
follows:
Bit [15] :
Byte 16
…
:
…
Bit [2]
:
Byte 2
Bit [0]
:
Byte 1
RW
0000_0000_0000_0000
MMD Address 2h, Register 1Dh – Wake-On-LAN – Customized Packet, Type 0, Mask 1
MMD Address 2h, Register 21h – Wake-On-LAN – Customized Packet, Type 1, Mask 1
MMD Address 2h, Register 25h – Wake-On-LAN – Customized Packet, Type 2, Mask 1
MMD Address 2h, Register 29h – Wake-On-LAN – Customized Packet, Type 3, Mask 1
This register selects the bytes in the second 16
bytes of the packet (bytes 17 thru 32) that will
be used for CRC calculation.
For each bit in this register,
1 = Byte is selected for CRC calculation
2.1D.15:0
2.21.15:0
2.25.15:0
2.29.15:0
May 14, 2015
Custom Packet
Type X
Mask 1
0 = Byte is not selected for CRC calculation
The register-bit to packet-byte mapping is as
follows:
Bit [15] :
Byte 32
…
:
…
Bit [2]
:
Byte 18
Bit [0]
:
Byte 17
61
RW
0000_0000_0000_0000
Revision 2.2
Micrel, Inc.
KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 2h, Register 1Eh – Wake-On-LAN – Customized Packet, Type 0, Mask 2
MMD Address 2h, Register 22h – Wake-On-LAN – Customized Packet, Type 1, Mask 2
MMD Address 2h, Register 26h – Wake-On-LAN – Customized Packet, Type 2, Mask 2
MMD Address 2h, Register 2Ah – Wake-On-LAN – Customized Packet, Type 3, Mask 2
This register selects the bytes in the third 16
bytes of the packet (bytes 33 thru 48) that will
be used for CRC calculation.
For each bit in this register,
2.1E.15:0
2.22.15:0
2.26.15:0
2.2A.15:0
1 = Byte is selected for CRC calculation
Custom Packet
Type X
Mask 2
0 = Byte is not selected for CRC calculation
The register-bit to packet-byte mapping is as
follows:
Bit [15] :
Byte 48
…
:
…
Bit [2]
:
Byte 34
Bit [0]
:
Byte 33
RW
0000_0000_0000_0000
MMD Address 2h, Register 1Fh – Wake-On-LAN – Customized Packet, Type 0, Mask 3
MMD Address 2h, Register 23h – Wake-On-LAN – Customized Packet, Type 1, Mask 3
MMD Address 2h, Register 27h – Wake-On-LAN – Customized Packet, Type 2, Mask 3
MMD Address 2h, Register 2Bh – Wake-On-LAN – Customized Packet, Type 3, Mask 3
This register selects the bytes in the fourth 16
bytes of the packet (bytes 49 thru 64) that will
be used for CRC calculation.
For each bit in this register,
2.1F.15:0
2.23.15:0
2.27.15:0
2.2B.15:0
1 = Byte is selected for CRC calculation
Custom Packet
Type X
Mask 3
0 = Byte is not selected for CRC calculation
RW
0000_0000_0000_0000
Reserved
RW
0000
1 = Force 1000Base-T low-power idle
transmission
RW
0
RW
0
RW
00_0000_0000
The register-bit to packet-byte mapping is as
follows:
Bit [15] :
Byte 64
…
:
…
Bit [2]
:
Byte 50
Bit [0]
:
Byte 49
MMD Address 3h, Register 0h – PCS EEE – Control
3.0.15:12
Reserved
3.0.11
1000Base-T
Force LPI
0 = Normal operation
During receive lower-power idle mode,
3.0.10
100Base-TX
RX_CLK
Stoppable
3.0.9:0
Reserved
Reserved
May 14, 2015
1 = RX_CLK stoppable for 100Base-TX
0 = RX_CLK not stoppable for 100Base-TX
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KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 3h, Register 1h – PCS EEE – Status
3.1.15:12
Reserved
Reserved
3.1.11
Transmit LowPower Idle
Received
1 = Transmit PCS has received low-power idle
3.1.10
Receive LowPower Idle
Received
1 = Receive PCS has received low-power idle
3.1.9
Transmit LowPower Idle
Indication
3.1.8
Receive LowPower Idle
Indication
3.1.7:0
Reserved
0 = Low-power idle not received
0 = Low-power idle not received
1 = Transmit PCS is currently receiving lowpower idle
0 = Transmit PCS is not currently receiving lowpower idle
1 = Receive PCS is currently receiving lowpower idle
0 = Receive PCS is not currently receiving lowpower idle
Reserved
RO
0000
RO/LH
0
RO/LH
0
RO
RO
RO
0000_0000
RW
0000_0000_0000_0
RW
0
This bit is set to ‘0’ as the default after power-up
or reset. Set this bit to ‘1’ to enable 100Mbps
EEE mode.
RW
0
Reserved
RW
0
RO
0000_0000_0000_0
RO
0
RO
0
RO
0
RW
0000_0
RW
0
RW
00_1111_1111
MMD Address 7h, Register 3Ch – EEE Advertisement
7.3C.15:3
Reserved
Reserved
1 = 1000Mbps EEE capable
7.3C.2
1000Base-T
EEE
0 = No 1000Mbps EEE capability
This bit is set to ‘0’ as the default after power-up
or reset. Set this bit to ‘1’ to enable 1000Mbps
EEE mode.
1 = 100Mbps EEE capable
7.3C.1
100Base-TX
EEE
7.3C.0
Reserved
0 = No 100Mbps EEE capability
MMD Address 7h, Register 3Dh – EEE Link Partner Advertisement
7.3D.15:3
Reserved
Reserved
7.3D.2
1000Base-T
EEE
1 = 1000Mbps EEE capable
7.3D.1
100Base-TX
EEE
1 = 100Mbps EEE capable
7.3D.0
Reserved
Reserved
0 = No 1000Mbps EEE capability
0 = No 100Mbps EEE capability
MMD Address 1Ch, Register 4h – Analog Control 4
1C.4.15:11
Reserved
Reserved
1C.4.10
10Base-Te
Mode
1 = EEE 10Base-Te (1.75V TX amplitude)
1C.4.9:0
Reserved
Reserved
May 14, 2015
0 = Standard 10Base-T (2.5V TX amplitude)
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KSZ9031RNX
MMD Registers – Descriptions (Continued)
Address
Name
Description
Mode
(7 )
Default
MMD Address 1Ch, Register 23h – EDPD Control
1C.23.15:1
Reserved
Reserved
RW
0000_0000_0000_000
RW
0
Energy-detect power-down mode
1C.23.0
EDPD Mode
Enable
1 = Enable
0 = Disable
May 14, 2015
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KSZ9031RNX
Absolute Maximum Ratings(8)
Operating Ratings(9)
Supply Voltage (VIN)
(DVDDL, AVDDL, AVDDL_PLL) ............ –0.5V to +1.8V
(AVDDH) ................................................ –0.5V to +5.0V
(DVDDH) ................................................ –0.5V to +5.0V
Input Voltage (all inputs) .............................. –0.5V to +5.0V
Output Voltage (all outputs) ......................... –0.5V to +5.0V
Lead Temperature (soldering, 10s) ............................ 260°C
Storage Temperature (TS) ......................... –55°C to +150°C
Supply Voltage
(DVDDL, AVDDL, AVDDL_PLL) ..... +1.140V to +1.260V
(AVDDH @ 3.3V) ............................ +3.135V to +3.465V
(AVDDH @ 2.5V, C-temp only) ....... +2.375V to +2.625V
(DVDDH @ 3.3V) ............................ +3.135V to +3.465V
(DVDDH @ 2.5V) ............................ +2.375V to +2.625V
(DVDDH @ 1.8V) ............................ +1.710V to +1.890V
Ambient Temperature
(TA Commercial: KSZ9031RNXC).............. 0°C to +70°C
(TA Industrial: KSZ9031RNXI) ................ −40°C to +85°C
(TA Automotive: KSZ9031RNXU) ........... −40°C to +85°C
(TA Automotive: KSZ9031RNXV) ......... −40°C to +105°C
Maximum Junction Temperature (TJ_MAX) .................. 125°C
Thermal Resistance (θJA) .................................... 36.34°C/W
Thermal Resistance (θJC) ...................................... 9.47°C/W
Electrical Characteristics(10)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Supply Current – Core / Digital I/Os
1.2V Total of:
DVDDL (digital core) +
ICORE
AVDDL (analog core) +
AVDDL_PLL (PLL)
IDVDDH_1.8
1.8V for Digital I/Os
(RGMII operating @ 1.8V)
1000Base-T link-up (no traffic)
210
mA
1000Base-T full-duplex @ 100% utilization
221
mA
100Base-TX link-up (no traffic)
63.6
mA
100Base-TX full-duplex @ 100% utilization
63.8
mA
10Base-T link-up (no traffic)
7.1
mA
10Base-T full-duplex @ 100% utilization
7.7
mA
Software power-down mode (Reg. 0.11 = 1)
1.0
mA
Chip power-down mode
(strap-in pins MODE[3:0] = 0111)
0.7
mA
1000Base-T link-up (no traffic)
11.2
mA
1000Base-T full-duplex @ 100% utilization
23.6
mA
100Base-TX link-up (no traffic)
8.4
mA
100Base-TX full-duplex @ 100% utilization
9.8
mA
10Base-T link-up (no traffic)
3.6
mA
10Base-T full-duplex @ 100% utilization
5.6
mA
Software power-down mode (Reg. 0.11 = 1)
5.5
mA
Chip power-down mode
(strap-in pins MODE[3:0] = 0111)
0.3
mA
Notes:
8.
Exceeding the absolute maximum rating can damage the device. Stresses greater than the absolute maximum rating can cause permanent
damage to the device. Operation of the device at these or any other conditions above those specified in the operating sections of this
specification is not implied. Maximum conditions for extended periods may affect reliability.
9.
The device is not guaranteed to function outside its operating rating.
10. TA = 25°C. Specification is for packaged product only.
May 14, 2015
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Micrel, Inc.
KSZ9031RNX
Electrical Characteristics(10) (Continued)
Symbol
IDVDDH_2.5
IDVDDH_3.3
Parameter
2.5V for Digital I/Os
(RGMII operating @ 2.5V)
3.3V for Digital I/Os
(RGMII operating @ 3.3V)
Condition
Min.
Typ.
Max.
Units
1000Base-T link-up (no traffic)
14.7
mA
1000Base-T full-duplex @ 100% utilization
31.5
mA
100Base-TX link-up (no traffic)
10.5
mA
100Base-TX full-duplex @ 100% utilization
13.0
mA
10Base-T link-up (no traffic)
6.3
mA
10Base-T full-duplex @ 100% utilization
9.0
mA
Software power-down mode (Reg. 0.11 = 1)
6.7
mA
Chip power-down mode
(strap-in pins MODE[3:0] = 0111)
0.7
mA
1000Base-T link-up (no traffic)
19.5
mA
1000Base-T full-duplex @ 100% utilization
41.5
mA
100Base-TX link-up (no traffic)
13.9
mA
100Base-TX full-duplex @ 100% utilization
17.2
mA
10Base-T link-up (no traffic)
11.5
mA
10Base-T full-duplex @ 100% utilization
13.7
mA
Software power-down mode (Reg. 0.11 = 1)
9.3
mA
Chip power-down mode
(strap-in pins MODE[3:0] = 0111)
2.2
mA
Supply Current – Transceiver
(Equivalent to current draw through external transformer center taps for PHY transceivers with current-mode transmit
drivers.)
IAVDDH_2.5
IAVDDH_3.3
1000Base-T link-up (no traffic)
58.8
mA
1000Base-T full-duplex @ 100% utilization
57.9
mA
100Base-TX link-up (no traffic)
24.9
mA
2.5V for Transceiver
100Base-TX full-duplex @ 100% utilization
24.9
mA
(Recommended for commercial
temperature range operation
only)
10Base-T link-up (no traffic)
11.5
mA
10Base-T full-duplex @ 100% utilization
25.3
mA
Software power-down mode
(Reg. 0.11 = 1)
3.1
mA
Chip power-down mode
(strap-in pins MODE[3:0] = 0111)
0.02
mA
1000Base-T link-up (no traffic)
67.4
mA
1000Base-T full-duplex @ 100% utilization
66.3
mA
100Base-TX link-up (no traffic)
28.7
mA
100Base-TX full-duplex @ 100% utilization
28.6
mA
10Base-T link-up (no traffic)
15.9
mA
10Base-T full-duplex @ 100% utilization
28.6
mA
Software power-down mode
(Reg. 0.11 = 1)
4.2
mA
Chip power-down mode
(strap-in pins MODE[3:0] = 0111)
0.02
mA
3.3V for Transceiver
May 14, 2015
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Micrel, Inc.
KSZ9031RNX
Electrical Characteristics(10) (Continued)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
CMOS Inputs
VIH
VIL
IIHL
Input High Voltage
Input Low Voltage
Input High Leakage Current
DVDDH (digital I/Os) = 3.3V
2.0
V
DVDDH (digital I/Os) = 2.5V
1.5
V
DVDDH (digital I/Os) = 1.8V
1.1
V
DVDDH (digital I/Os) = 3.3V
1.3
V
DVDDH (digital I/Os) = 2.5V
1.0
V
DVDDH (digital I/Os) = 1.8V
0.7
V
-2.0
2.0
µA
-2.0
2.0
µA
-120
-40
µA
DVDDH = 3.3V and VIH = 3.3V
All digital input pins
DVDDH = 3.3V and VIL = 0.0V
IILL
Input Low Leakage Current
All digital input pins, except MDC, MDIO,
RESET_N.
DVDDH = 3.3V and VIL = 0.0V
MDC, MDIO, RESET_N pins with internal
pull-ups
CMOS Outputs
DVDDH (digital I/Os) = 3.3V, IOH (min) = 10mA
All digital output pins
VOH
Output High Voltage
DVDDH (digital I/Os) = 2.5V, IOH (min) = 10mA
All digital output pins
DVDDH (digital I/Os) = 1.8V, IOH (min) = 13mA
All digital output pins, except LED1, LED2
2.7
V
2.0
V
1.5
V
DVDDH (digital I/Os) = 3.3V, IOL (min) = 10mA
All digital output pins
VOL
Output Low Voltage
DVDDH (digital I/Os) = 2.5V, IOL (min) = 10mA
All digital output pins
DVDDH (digital I/Os) = 1.8V, IOL (min) = 13mA
All digital output pins, except LED1, LED2
|Ioz|
Output Tri-State Leakage
0.3
V
0.3
V
0.3
V
10
µA
LED Outputs
ILED
Output Drive Current
DVDDH (digital I/Os) = 3.3V or 2.5V and VOL
at 0.3V
10
mA
Each LED pin (LED1, LED2)
Pull-Up Pins
(Measured with pin input voltage level at 1/2 DVDDH)
pu
Internal Pull-Up Resistance
(MDC, MDIO, RESET_N pins)
May 14, 2015
DVDDH (digital I/Os) = 3.3V
13
22
31
kΩ
DVDDH (digital I/Os) = 2.5V
16
28
39
kΩ
DVDDH (digital I/Os) = 1.8V
26
44
62
kΩ
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Revision 2.2
Micrel, Inc.
KSZ9031RNX
Electrical Characteristics(10) (Continued)
100Base-TX Transmit
(Measured differentially after 1:1 transformer)
VO
Peak Differential Output
Voltage
100Ω termination across differential output
VIMB
Output Voltage Imbalance
100Ω termination across differential output
tr , tf
Rise/Fall Time
Rise/Fall Time Imbalance
0.95
1.05
V
2
%
3
5
ns
0
0.5
ns
±0.25
ns
5
%
Duty Cycle Distortion
Overshoot
Output Jitter
Peak-to-peak
0.7
ns
10Base-T Transmit
(Measured differentially after 1:1 transformer)
VP
Peak Differential Output
Voltage
100Ω termination across differential output
Jitter Added
Peak-to-peak
Harmonic Rejection
Transmit all-one signal sequence
2.2
2.8
V
3.5
ns
–31
dB
400
mV
1.2
V
10Base-T Receive
VSQ
Squelch Threshold
5MHz square wave
300
Transmitter – Drive Setting
VSET
Reference Voltage of ISET
R(ISET) = 12.1kΩ
LDO Controller – Drive Range
VLDO_O
Output Drive Range for LDO_O
(Pin 43) to Gate Input of
P-Channel MOSFET
May 14, 2015
AVDDH = 3.3V for MOSFET source voltage
0.85
2.8
AVDDH = 2.5V for MOSFET source voltage
(recommended for commercial temperature
range operation only)
0.85
2.0
68
V
Revision 2.2
Micrel, Inc.
KSZ9031RNX
Timing Diagrams
RGMII Timing
As the default, after power-up or reset, the KSZ9031RNX RGMII timing conforms to the timing requirements in the RGMII
Version 2.0 Specification for internal PHY chip delay.
For the transmit path (MAC to KSZ9031RNX), the KSZ9031RNX does not add any delay locally at its GTX_CLK, TX_EN
and TXD[3:0] input pins, and expects the GTX_CLK delay to be provided on-chip by the MAC. If MAC does not provide
any delay or insufficient delay for the GTX_CLK, the KSZ9031RNX has pad skew registers that can provide up to 1.38ns
on-chip delay.
For the receive path (KSZ9031RNX to MAC), the KSZ9031RNX adds 1.2ns typical delay to the RX_CLK output pin with
respect to RX_DV and RXD[3:0] output pins. If necessary, the KSZ9031RNX has pad skew registers that can adjust the
RX_CLK on-chip delay up to 2.58ns from the 1.2ns default delay.
It is common to implement RGMII PHY-to-MAC designs that either PHY, MAC, or both PHY and MAC are not fully RGMII
v2.0 compliant with on-chip clock delay. These combinations of mixed RGMII v1.3/v2.0 designs and plus sometimes nonmatching RGMII PCB trace routings require a review of the entire RGMII system timings (PHY on-chip, PCB trace delay,
MAC on-chip) to compute the aggregate clock delay and determine if the clock delay timing is met. If timing adjustment is
needed, pad skew registers are provided by the KSZ9031RNX. Refer to RGMII Pad Skew Registers section.
The following Figure 12, Figure 13 and Table 19 from the RGMII v2.0 Specification are provided as references to
understanding RGMII v1.3 external delay and RGMII v2.0 on-chip delay timings.
Figure 12. RGMII v2.0 Spec (Figure 2 – Multiplexing and Timing Diagram – Original RGMII (v1.3) with external delay)
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Micrel, Inc.
KSZ9031RNX
Figure 13. RGMII v2.0 Spec (Figure 3 – Multiplexing and Timing Diagram – RGMII-ID (v2.0) with internal chip delay)
The following notes provides clarification for Figure 13.
TXC (SOURCE DATA), solid line, is the MAC GTX_CLK clock output timing per RGMII v1.3 Specification (PCB delay line
required or PHY internal delay required)
TXC (SOURCE DATA) WITH INTERNAL DELAY ADDED, dotted line, is the MAC GTX_CLK clock output timing per
RGMII v2.0 Specification (no PCB delay required and no PHY internal delay required)
RXC (SOURCE DATA), solid line, is the PHY RX_CLK clock output timing per RGMII v1.3 Specification (PCB delay line
required or MAC internal delay required)
RXC (SOURCE DATA) WITH INTERNAL DELAY ADDED, dotted line, is the PHY RX_CLK clock output timing per
RGMII v2.0 Specification (no PCB delay required and no MAC internal delay required)
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KSZ9031RNX
Table 19. RGMII v2.0 Specification (Timing Specifics from Table 2)
Timing Parameter
Description
Min.
Typ.
Max.
Unit
–500
500
ps
2.6
ns
TskewT
Data to clock output skew (at transmitter) per RGMII v1.3 (external
delay)
TskewR
Data to clock input skew (at receiver) per RGMII v1.3 (external delay)
1.0
TsetupT
Data to clock output setup (at transmitter – integrated delay)
1.2
2.0
ns
TholdT
Clock to data output hold (at transmitter – integrated delay)
1.2
2.0
ns
TsetupR
Data to clock input setup (at receiver – integrated delay)
1.0
2.0
ns
TholdR
Clock to data input hold (at receiver – integrated delay)
1.0
2.0
ns
Tcyc (1000Base-T)
Clock cycle duration for 1000Base-T
7.2
8
8.8
ns
Tcyc (100Base-TX)
Clock cycle duration for 100Base-TX
36
40
44
ns
Tcyc (10Base-T)
Clock cycle duration for 10Base-T
360
400
440
ns
The RGMII Version 2.0 Specification defines the RGMII data-to-clock skews only for 1000Mbps operation, which uses
both clock edges for sampling the data and control signals at the 125MHz clock frequency (8ns period). For 10/100Mbps
operations, the data signals are sampled on the rising clock edge and the control signals are sampled on both clock
edges. With slower clock frequencies, 2.5MHz (400ns period) for 10Mbps and 25MHz (40ns period) for 100Mbps, the
RGMII data-to-clock skews for 10/100Mbps operations will have greater timing margins than for 1000Mbps operation, and
therefore can be relaxed from 2.6ns (maximum) for 1000Mbps to 160ns (maximum) for 10Mbps and 16ns (maximum) for
100Mbps.
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Auto-Negotiation Timing
Figure 14. Auto-Negotiation Fast Link Pulse (FLP) Timing
Table 20. Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters
Timing Parameter
Description
Min.
Typ.
Max.
Units
8
16
24
ms
tBTB
FLP burst to FLP burst
tFLPW
FLP burst width
tPW
Clock/data pulse width
tCTD
Clock pulse to data pulse
55.5
64
69.5
µs
tCTC
Clock pulse to clock pulse
111
128
139
µs
Number of clock/data pulses per FLP burst
17
2
ms
100
ns
33
The KSZ9031RNX Fast Link Pulse (FLP) burst-to-burst transmit timing for Auto-Negotiation defaults to 8ms. IEEE 802.3
Standard specifies this timing to be 16ms +/-8ms. Some PHY link partners need to receive the FLP with 16ms centered
timing; otherwise, there can be intermittent link failures and long link-up times.
After KSZ9031RNX power-up/reset, program the following register sequence to set the FLP timing to 16ms:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Write Register Dh = 0x0000 // Set up register address for MMD – Device Address 0h
Write Register Eh = 0x0004 // Select Register 4h of MMD – Device Address 0h
Write Register Dh = 0x4000 // Select register data for MMD – Device Address 0h, Register 4h
Write Register Eh = 0x0006 // Write value 0x0006 to MMD – Device Address 0h, Register 4h
Write Register Dh = 0x0000 // Set up register address for MMD – Device Address 0h
Write Register Eh = 0x0003 // Select Register 3h of MMD – Device Address 0h
Write Register Dh = 0x4000 // Select register data for MMD – Device Address 0h, Register 3h
Write Register Eh = 0x1A80 // Write value 0x1A80 to MMD – Device Address 0h, Register 3h
Write Register 0h, Bit [9] = 1 // Restart Auto-Negotiation
The above setting for 16ms FLP transmit timing is compatible with all PHY link partners.
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MDC/MDIO Timing
Figure 15. MDC/MDIO Timing
Table 21. MDC/MDIO Timing Parameters
Timing Parameter
Description
tP
MDC period
Min.
Typ.
120
400
Max.
Unit
ns
t1MD1
MDIO (PHY input) setup to rising edge of MDC
10
ns
tMD2
MDIO (PHY input) hold from rising edge of MDC
10
ns
tMD3
MDIO (PHY output) delay from rising edge of MDC
0
ns
The typical MDC clock frequency is 2.5MHz (400ns clock period).
The KSZ9031RNX can operate with MDC clock frequencies generated from bit banging with GPIO pin in the 10s/100s of
Hertz and have been tested up to a MDC clock frequency of 8.33MHz (120ns clock period). Test condition for 8.33MHz is
for one KSZ9031RNX PHY on the MDIO line with a 1.0kΩ pull-up to the DVDDH supply rail.
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Power-Up/Power-Down/Reset Timing
Figure 16. Power-Up/Power-Down/Reset Timing
Note 1:
The recommended power-up sequence is to have the transceiver (AVDDH) and digital I/O (DVDDH) voltages power up
before the 1.2V core (DVDDL, AVDDL, AVDDL_PLL) voltage. If the 1.2V core must power up first, the maximum lead time
for the 1.2V core voltage with respect to the transceiver and digital I/O voltages should be 200µs.
There is no power sequence requirement between transceiver (AVDDH) and digital I/O (DVDDH) power rails.
The power-up waveforms should be monotonic for all supply voltages to the KSZ9031RNX.
Note 2:
After the de-assertion of reset, wait a minimum of 100µs before starting programming on the MIIM (MDC/MDIO) interface.
Note 3:
The recommended power-down sequence is to have the 1.2V core voltage power-down before powering down the
transceiver and digital I/O voltages.
Table 22. Power-Up/Power-Down/Reset Timing Parameters
Parameter
Description
Min
Max
Units
tVR
Supply voltages rise time (must be monotonic)
200
µs
tSR
Stable supply voltages to de-assertion of reset
10
ms
tCS
Strap-in pin configuration setup time
5
ns
tCH
Strap-in pin configuration hold time
5
ns
tRC
De-assertion of reset to strap-in pin output
6
ns
tPC
Supply voltages cycle off-to-on time
150
ms
Before the next power-up cycle, all supply voltages to the KSZ9031RNX should reach less than 0.4V and there should be
a minimum wait time of 150ms from power-off to power-on.
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Reset Circuit
The following are some reset circuit suggestions.
Figure 17 illustrates the reset circuit for powering up the KSZ9031RNX if reset is triggered by the power supply.
Figure 17. Reset Circuit for triggering by Power Supply
Figure 18 illustrates the reset circuit for applications where reset is driven by another device (for example, the CPU or an
FPGA). At power-on-reset, R, C, and D1 provide the monotonic rise time to reset the KSZ9031RNX device. The
RST_OUT_N from the CPU/FPGA provides the warm reset after power-up.
The KSZ9031RNX and CPU/FPGA references the same digital I/O voltage (DVDDH).
Figure 18. Reset Circuit for Interfacing with CPU/FPGA Reset Output
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Figure 19 illustrates the reset circuit with MIC826 Voltage Supervisor driving the KSZ9031RNX reset input.
DVDDH
KSZ9031RNX
RESET_N
DVDDH
Part
Number
MIC826
Reset
Threshold
MIC826TYMT / 3.075V
MIC826ZYMT / 2.315V
MIC826WYMT / 1.665V
RESET#
DVDDH = 3.3V, 2.5V, or 1.8V
Figure 19. Rest Circuit with MIC826 Voltage Supervisor
Reference Circuits – LED Strap-In Pins
The pull-up and pull-down reference circuits for the LED2/PHYAD1 and LED1/PHYAD0 strapping pins are shown in
Figure 20 for 3.3V and 2.5V DVDDH.
Figure 20. Reference Circuits for LED Strapping Pins
For 1.8V DVDDH, LED indication support requires voltage level shifters between LED[2:1] pins and LED indicator diodes
to ensure the multiplexed PHYAD[1:0] strapping pins are latched in high/low correctly. If LED indicator diodes are not
implemented, the PHYAD[1:0] strapping pins just need 10kΩ pull-up to 1.8V DVDDH for a value of 1, and 1.0kΩ pull-down
to ground for a value of 0.
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Reference Clock – Connection and Selection
A crystal or external clock source, such as an oscillator, is used to provide the reference clock for the KSZ9031RNX. The
reference clock is 25MHz for all operating modes of the KSZ9031RNX.
The KSZ9031RNX uses the AVDDH supply, analog 3.3V (or analog 2.5V option for commercial temp only), for the crystal/
clock pins (XI, XO). If the 25MHz reference clock is provided externally, the XI input pin should have a minimum clock
voltage peak-to-peak (Vp-p) swing of 2.5V reference to ground. If Vp-p is less than 2.5V, series capacitive coupling is
recommended. With capacitive coupling, the Vp-p swing can be down to 1.5V. Maximum Vp-p swing is 3.3V +5%.
Figure 21 and Table 23 shows the reference clock connection to XI and XO of the KSZ9031RNX, and the reference clock
selection criteria.
Figure 21. 25MHz Crystal/Oscillator Reference Clock Connection
Table 23. Reference Crystal/Clock Selection Criteria
Characteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (maximum)
±50
ppm
Crystal series resistance (typical)
40
Ω
Crystal load capacitance (typical)
22
pF
On-Chip LDO Controller – MOSFET Selection
If the optional LDO controller is used to generate 1.2V for the core voltage, the selected MOSFET should exceed the
following minimum requirements:
•
•
•
•
•
P-channel
500mA (continuous current)
3.3V or 2.5V (source – input voltage)
1.2V (drain – output voltage)
VGS in the range of:
(-1.2V to -1.5V) @ 500mA for 3.3V source voltage
(-1.0V to -1.1V) @ 500mA for 2.5V source voltage
The VGS for the MOSFET needs to be operating in the constant current saturated region, and not towards the VGS(th), the
threshold voltage for the cut-off region of the MOSFET.
See the end of Electrical Characteristics section for LDO controller output driving range to the gate input of the MOSFET.
Refer to application note ANLAN206 – KSZ9031 Gigabit PHY Optimized Power Scheme for High Efficiency, Low-Power
Consumption and Dissipation as design reference.
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Magnetic – Connection and Selection
A 1:1 isolation transformer is required at the line interface. Use one with integrated common-mode chokes for designs
exceeding FCC requirements. An optional auto-transformer stage following the chokes provides additional common-mode
noise and signal attenuation.
The KSZ9031RNX design incorporates voltage-mode transmit drivers and on-chip terminations.
With the voltage-mode implementation, the transmit drivers supply the common-mode voltages to the four differential
pairs. Therefore, the four transformer center tap pins on the KSZ9031RNX side should not be connected to any power
supply source on the board; rather, the center tap pins should be separated from one another and connected through
separate 0.1µF common-mode capacitors to ground. Separation is required because the common-mode voltage could be
different between the four differential pairs, depending on the connected speed mode.
Figure 22 shows the typical gigabit magnetic interface circuit for the KSZ9031RNX.
Figure 22. Typical Gigabit Magnetic Interface Circuit
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Table 24 lists recommended magnetic characteristics.
Table 24. Magnetics Selection Criteria
Parameter
Value
Test Condition
Turns ratio
1 CT : 1 CT
Open-circuit inductance (minimum)
350µH
100mV, 100kHz, 8mA
Insertion loss (maximum)
1.0dB
0MHz to 100MHz
HIPOT (minimum)
1500Vrms
Table 25 is a list of compatible single-port magnetics with separated transformer center tap pins on the G-PHY chip side
that can be used with the KSZ9031RNX.
Table 25. Compatible Single-Port 10/100/1000 Magnetics
Manufacturer
Part Number
Bel Fuse
0826-1G1T-23-F
Yes
0°C to 70°C
Yes
HALO
TG1G-E001NZRL
No
–40°C to 85°C
No
HALO
TG1G-S001NZRL
No
0°C to 70°C
No
HALO
TG1G-S002NZRL
Yes
0°C to 70°C
No
Pulse
H5007NL
Yes
0°C to 70°C
No
Pulse
H5062NL
Yes
0°C to 70°C
No
Pulse
HX5008NL
Yes
–40°C to 85°C
No
Pulse
JK0654219NL
Yes
0°C to 70°C
Yes
Pulse
JK0-0136NL
No
0°C to 70°C
Yes
TDK
TLA-7T101LF
No
0°C to 70°C
No
Wurth/Midcom
000-7093-37R-LF1
Yes
0°C to 70°C
No
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KSZ9031RNX
Package Information(11) and Recommended Land Pattern
48-Pin (7mm × 7mm) QFN
Note:
11. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
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Package Information(11) and Recommended Land Pattern (Continued)
48-Pin (7mm × 7mm) WQFN
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MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing & communications
markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock
management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company
customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products.
Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and
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of distributors and reps worldwide.
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
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can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
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