MICREL KSZ8041TL

KSZ8041TL/FTL
10Base-T/100Base-TX/100Base-FX
Physical Layer Transceiver
Data Sheet Rev. 1.1
General Description
The KSZ8041TL is a single supply 10Base-T/100Base-TX
Physical Layer Transceiver, which provides MII/RMII/SMII
interfaces to transmit and receive data. It utilizes a unique
mixed-signal design to extend signaling distance while
reducing power consumption.
HP Auto MDI/MDI-X provides the most robust solution for
eliminating the need to differentiate between crossover
and straight-through cables.
Micrel LinkMD® TDR-based cable diagnostics permit
identification of faulty copper cabling.
The KSZ8041TL represents a new level of features and
performance and is an ideal choice of physical layer
transceiver for 10Base-T/100Base-TX applications.
The KSZ8041FTL has all the identical rich features of the
KSZ8041TL plus 100Base-FX support for fiber and media
converter applications.
Both KSZ8041TL and KSZ8041FTL are available in 48pin, lead-free TQFP packages (See Ordering Information).
Data sheets and support documentation can be found 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
April 2007
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Features
Applications
• Single-chip 10Base-T/100Base-TX physical layer
solution
• Fully compliant to IEEE 802.3u Standard
• Low power CMOS design, power consumption of
<180mW
• HP auto MDI/MDI-X for reliable detection and correction
for straight-through and crossover cables with disable
and enable option
• Robust operation over standard cables
• LinkMD® TDR-based cable diagnostics for identification
of faulty copper cabling
• Fiber support: 100Base-FX (KSZ8041FTL only), Backto-Back mode (KSZ8041FTL and KSZ8041TL)
• MII interface support
• RMII interface support with external 50MHz system
clock
• SMII interface support with external 125MHz system
clock and 12.5MHz sync clock from MAC
• MIIM (MDC/MDIO) management bus to 12.5MHz for
rapid PHY register configuration
• Interrupt pin option
• Programmable LED outputs for link, activity and speed
• Power down and power saving modes
• Single power supply (3.3V)
• Built-in 1.8V regulator for core
• Available in 48-pin TQFP package
•
•
•
•
•
•
•
April 2007
2
Printer
LOM
Game Console
IPTV
IP Phone
IP Set-top Box
Media Converter
Ordering Information
Part Number
KSZ8041TL
Temp. Range
0°C to 70°C
(1)
Package
48-Pin TQFP
Lead Finish
Pb-Free
KSZ8041TLI
-40°C to 85°C
48-Pin TQFP
Pb-Free
KSZ8041FTL
0°C to 70°C
48-Pin TQFP
Pb-Free
KSZ8041FTLI(1)
-40°C to 85°C
48-Pin TQFP
Pb-Free
Note:
1.
Contact factory for lead time.
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Revision History
Revision
Date
Summary of Changes
1.0
12/21/06
Data sheet created.
1.1
4/27/07
Added maximum MDC clock speed.
Added 40K +/-30% to note 1 of Pin Description and Strapping Options tables for internal pull-ups/pulldowns.
Changed Model Number in Register 3h – PHY Identifier 2.
Changed polarity (swapped definition) of DUPLEX strapping pin.
Removed DUPLEX strapping pin update to Register 4h – Auto-Negotiation Advertisement bits [8, 6].
Added Back-to-Back mode for KSZ8041TL.
Added Symbol Error to MII/RMII Receive Error description and Register 15h – RXER Counter.
Added a 100pF capacitor on REXT (pin 16) in Pin Description table.
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Contents
Pin Configuration .................................................................................................................................................................. 8
Pin Description .................................................................................................................................................................... 10
Strapping Options............................................................................................................................................................... 15
Functional Description ....................................................................................................................................................... 17
100Base-TX Transmit....................................................................................................................................................... 17
100Base-TX Receive........................................................................................................................................................ 17
PLL Clock Synthesizer...................................................................................................................................................... 17
Scrambler/De-scrambler (100Base-TX only).................................................................................................................... 17
10Base-T Transmit ........................................................................................................................................................... 17
10Base-T Receive ............................................................................................................................................................ 18
SQE and Jabber Function (10Base-T only)...................................................................................................................... 18
Auto-Negotiation ............................................................................................................................................................... 18
MII Management (MIIM) Interface .................................................................................................................................... 20
Interrupt (INTRP) .............................................................................................................................................................. 20
MII Data Interface ............................................................................................................................................................. 20
MII Signal Definition.......................................................................................................................................................... 21
Transmit Clock (TXC) ................................................................................................................................................. 21
Transmit Enable (TXEN)............................................................................................................................................. 21
Transmit Data [3:0] (TXD[3:0])................................................................................................................................... 21
Receive Clock (RXC) .................................................................................................................................................. 21
Receive Data Valid (RXDV) ........................................................................................................................................ 22
Receive Data [3:0] (RXD[3:0]) .................................................................................................................................... 22
Receive Error (RXER)................................................................................................................................................. 22
Carrier Sense (CRS) ................................................................................................................................................... 22
Collision (COL) ........................................................................................................................................................... 22
Reduced MII (RMII) Data Interface................................................................................................................................... 22
RMII Signal Definition ....................................................................................................................................................... 23
Reference Clock (REF_CLK) ..................................................................................................................................... 23
Transmit Enable (TX_EN)........................................................................................................................................... 23
Transmit Data [1:0] (TXD[1:0])................................................................................................................................... 23
Carrier Sense/Receive Data Valid (CRS_DV) ........................................................................................................... 23
Receive Data [1:0] (RXD[1:0]) .................................................................................................................................... 23
Receive Error (RX_ER)............................................................................................................................................... 23
Collision Detection ..................................................................................................................................................... 24
Serial MII (SMII) Data Interface ........................................................................................................................................ 24
SMII Signal Definition ....................................................................................................................................................... 24
Clock Reference (CLOCK) ......................................................................................................................................... 24
Sync Pulse (SYNC) ..................................................................................................................................................... 24
Transmit Data and Control (TX) ................................................................................................................................ 24
Receive Data and Control (RX).................................................................................................................................. 25
Collision Detection ..................................................................................................................................................... 26
HP Auto MDI/MDI-X.......................................................................................................................................................... 27
Straight Cable ............................................................................................................................................................. 27
Crossover Cable ......................................................................................................................................................... 28
LinkMD® Cable Diagnostics.............................................................................................................................................. 29
Access ......................................................................................................................................................................... 29
Usage ........................................................................................................................................................................... 29
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Power Management.......................................................................................................................................................... 29
Power Saving Mode.................................................................................................................................................... 29
Power Down Mode...................................................................................................................................................... 29
Reference Clock Connection Options .............................................................................................................................. 30
Reference Circuit for Power and Ground Connections .................................................................................................... 31
100Base-FX Fiber Operation (KSZ8041FTL only) ........................................................................................................... 32
Fiber Signal Detect ..................................................................................................................................................... 32
Far-End Fault............................................................................................................................................................... 32
Back-to-Back Media Converter......................................................................................................................................... 33
MII Back-to-Back Mode .............................................................................................................................................. 33
RMII Back-to-Back Mode............................................................................................................................................ 34
Register Map........................................................................................................................................................................ 35
Register Description ........................................................................................................................................................... 35
Absolute Maximum Ratings(1) ............................................................................................................................................ 43
Operating Ratings(2) ............................................................................................................................................................ 43
Electrical Characteristics(3) ................................................................................................................................................ 43
Timing Diagrams ................................................................................................................................................................. 45
MII SQE Timing (10Base-T) ............................................................................................................................................. 45
MII Transmit Timing (10Base-T) ....................................................................................................................................... 46
MII Receive Timing (10Base-T) ........................................................................................................................................ 47
MII Transmit Timing (100Base-TX) .................................................................................................................................. 48
MII Receive Timing (100Base-TX) ................................................................................................................................... 49
RMII Timing....................................................................................................................................................................... 50
Auto-Negotiation Timing ................................................................................................................................................... 51
MDC/MDIO Timing ........................................................................................................................................................... 52
Reset Timing..................................................................................................................................................................... 53
Reset Circuit ........................................................................................................................................................................ 54
Selection of Isolation Transformer.................................................................................................................................... 56
Selection of Reference Crystal .......................................................................................................................................... 56
Package Information........................................................................................................................................................... 57
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
List of Figures
Figure 1. Auto-Negotiation Flow Chart................................................................................................................................. 19
Figure 2. SMII Transmit Data/Control Segment................................................................................................................... 25
Figure 3. SMII Receive Data/Control Segment.................................................................................................................... 26
Figure 4. Typical Straight Cable Connection ....................................................................................................................... 27
Figure 5. Typical Crossover Cable Connection ................................................................................................................... 28
Figure 6. 25MHz Crystal / Oscillator Reference Clock for MII Mode ................................................................................... 30
Figure 7. 50MHz Oscillator Reference Clock for RMII Mode............................................................................................... 30
Figure 8. 125MHz Oscillator Reference Clock for SMII Mode ............................................................................................. 30
Figure 9. KSZ8041TL/FTL Power and Ground Connections............................................................................................... 31
Figure 10. KSZ8041FTL / KSZ8041TL Back-to-Back Media Converter .............................................................................. 33
Figure 11. MII SQE Timing (10Base-T) ............................................................................................................................... 45
Figure 12. MII Transmit Timing (10Base-T) ......................................................................................................................... 46
Figure 13. MII Receive Timing (10Base-T) .......................................................................................................................... 47
Figure 14. MII Transmit Timing (100Base-TX)..................................................................................................................... 48
Figure 15. MII Receive Timing (100Base-TX)...................................................................................................................... 49
Figure 16. RMII Timing – Data Received from RMII ............................................................................................................ 50
Figure 17. RMII Timing – Data Input to RMII ....................................................................................................................... 50
Figure 18. Auto-Negotiation Fast Link Pulse (FLP) Timing ................................................................................................. 51
Figure 19. MDC/MDIO Timing.............................................................................................................................................. 52
Figure 20. Reset Timing....................................................................................................................................................... 53
Figure 21. Recommended Reset Circuit.............................................................................................................................. 54
Figure 22. Recommended Reset Circuit for Interfacing with CPU/FPGA Reset Output ..................................................... 54
Figure 23. Reference Circuits for LED Strapping Pins......................................................................................................... 55
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
List of Tables
Table 1. MII Management Frame Format ............................................................................................................................ 20
Table 2. MII Signal Definition ............................................................................................................................................... 21
Table 3. RMII Signal Description.......................................................................................................................................... 23
Table 4. SMII Signal Description.......................................................................................................................................... 24
Table 5. SMII TX Bit Description .......................................................................................................................................... 25
Table 6. SMII TXD[0:7] Encoding Table .............................................................................................................................. 25
Table 7. SMII RX Bit Description.......................................................................................................................................... 26
Table 8. SMII RXD[0:7] Encoding Table .............................................................................................................................. 26
Table 9. MDI/MDI-X Pin Definition ....................................................................................................................................... 27
Table 10. KSZ8041TL/FTL Power Pin Description .............................................................................................................. 31
Table 11. Copper and Fiber Mode Selection ....................................................................................................................... 32
Table 12. MII Signal Connection for MII Back-to-Back Mode .............................................................................................. 33
Table 13. RMII Signal Connection for RMII Back-to-Back Mode......................................................................................... 34
Table 14. MII SQE Timing (10Base-T) Parameters ............................................................................................................. 45
Table 15. MII Transmit Timing (10Base-T) Parameters ...................................................................................................... 46
Table 16. MII Receive Timing (10Base-T) Parameters ....................................................................................................... 47
Table 17. MII Transmit Timing (100Base-TX) Parameters .................................................................................................. 48
Table 18. MII Receive Timing (100Base-TX) Parameters ................................................................................................... 49
Table 19. RMII Timing Parameters ...................................................................................................................................... 50
Table 20. Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters ............................................................................... 51
Table 21. MDC/MDIO Timing Parameters ........................................................................................................................... 52
Table 22. Reset Timing Parameters .................................................................................................................................... 53
Table 23. Transformer Selection Criteria ............................................................................................................................. 56
Table 24. Qualified Single Port Magnetics........................................................................................................................... 56
Table 25. Typical Reference Crystal Characteristics ........................................................................................................... 56
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
48
47
46
45
44
43
42
41
40
39
38
37
NC
RST#
NC
NC
NC
LED1 /
SPEED
LED0 /
NWAYEN
CRS /
CONFIG1
COL /
CONFIG0
TXD3
TXD2
GND
Pin Configuration
1
GND
TXD1 / TXD[1] /
SYNC
36
2
GND
TXD0 / TXD[0] /
TX
35
3
GND
TXEN /
TX_EN
34
4
VDDA_1.8
TXC
33
5
VDDA_1.8
INTRP
32
6
V1.8_OUT
VDD_1.8
31
7
VDDA_3.3
GND
30
8
VDDA_3.3
RXER / RX_ER /
ISO
29
9
RX-
RXC
28
10
RX+
RXDV / CRSDV /
CONFIG2
27
11
TX-
VDDIO_3.3
26
12
TX+
VDDIO_3.3
25
GND
XO
XI / REFCLK /
CLOCK
REXT
GND
MDIO
MDC
RXD3 /
PHYAD0
RXD2 /
PHYAD1
RXD1 / RXD[1] /
PHYAD2
RXD0 / RXD[0] / RX
DUPLEX
GND
KSZ8041TL
13
14
15
16
17
18
19
20
21
22
23
24
48-Pin TQFP
April 2007
8
M9999-042707-1.1
48
47
46
45
44
43
42
41
40
39
38
37
RST#
NC
NC
NC
LED1 /
SPEED / no FEF
LED0 /
NWAYEN
CRS /
CONFIG1
COL /
CONFIG0
TXD3
TXD2
GND
KSZ8041TL/FTL
FXSD /
FXEN
Micrel, Inc.
TXD1 / TXD[1] /
SYNC
36
GND
TXD0 / TXD[0] /
TX
35
3
GND
TXEN /
TX_EN
34
4
VDDA_1.8
TXC
33
5
VDDA_1.8
INTRP
32
6
V1.8_OUT
VDD_1.8
31
7
VDDA_3.3
GND
30
8
VDDA_3.3
RXER / RX_ER /
ISO
29
9
RX-
RXC
28
10
RX+
RXDV / CRSDV /
CONFIG2
27
11
TX-
VDDIO_3.3
26
12
TX+
VDDIO_3.3
25
REXT
GND
MDIO
MDC
RXD3 /
PHYAD0
RXD2 /
PHYAD1
RXD1 / RXD[1] /
PHYAD2
RXD0 / RXD[0] / RX
DUPLEX
GND
KSZ8041FTL
XI / REFCLK /
CLOCK
2
XO
GND
GND
1
13
14
15
16
17
18
19
20
21
22
23
24
48-Pin TQFP
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Pin Description
(1)
Pin Number
Pin Name
1
GND
Gnd
Ground
2
GND
Gnd
Ground
3
GND
Gnd
Ground
4
VDDA_1.8
P
1.8V analog VDD
5
VDDA_1.8
P
1.8V analog VDD
6
V1.8_OUT
P
1.8V output voltage from chip
7
VDDA_3.3
P
3.3V analog VDD
8
VDDA_3.3
P
3.3V analog VDD
Type
Pin Function
9
RX-
I/O
Physical receive or transmit signal (- differential)
10
RX+
I/O
Physical receive or transmit signal (+ differential)
11
TX-
I/O
Physical transmit or receive signal (- differential)
12
TX+
I/O
Physical transmit or receive signal (+ differential)
13
GND
Gnd
Ground
14
XO
O
Crystal feedback
This pin is used only in MII mode when a 25 MHz crystal is used.
This pin is a no connect if oscillator or external clock source is used, or if RMII
mode or SMII mode is selected.
15
XI /
I
CLOCK
16
REXT
Crystal / Oscillator / External Clock Input
MII Mode:
REFCLK /
I/O
25MHz +/-50ppm (crystal, oscillator, or external clock)
RMII Mode:
50MHz +/-50ppm (oscillator, or external clock only)
SMII Mode:
125MHz +/-100ppm (oscillator, or external clock only)
Set physical transmit output current
Connect a 6.49KΩ resistor in parallel with a 100pF capacitor to ground on this
pin. See KSZ8041TL-FTL reference schematics.
17
GND
Gnd
Ground
18
MDIO
I/O
Management Interface (MII) Data I/O
19
MDC
I
This pin requires an external 4.7KΩ pull-up resistor.
Management Interface (MII) Clock Input
This pin is synchronous to the MDIO data interface.
20
RXD3 /
Ipu/O
PHYAD0
21
RXD2 /
Ipd/O
PHYAD1
22
April 2007
RXD1 /
Ipd/O
(2)
/
MII Mode:
Receive Data Output[3]
Config Mode:
The pull-up/pull-down value is latched as PHYADDR[0] during
power-up / reset. See “Strapping Options” section for details.
MII Mode:
Receive Data Output[2]
Config Mode:
The pull-up/pull-down value is latched as PHYADDR[1] during
power-up / reset. See “Strapping Options” section for details.
MII Mode:
Receive Data Output[1]
(2)
/
(3)
/
(2)
/
RXD[1] /
RMII Mode:
Receive Data Output[1]
PHYAD2
Config Mode:
The pull-up/pull-down value is latched as PHYADDR[2] during
power-up / reset. See “Strapping Options” section for details.
10
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Pin Number
Pin Name
23
RXD0 /
(1)
Type
Ipu/O
RXD[0] /
Pin Function
MII Mode:
RMII Mode:
RX
DUPLEX
(2)
Receive Data Output[0]
(3)
/
/
(4)
/
SMII Mode:
Receive Data and Control
Config Mode:
Latched as DUPLEX (register 0h, bit 8) during power-up /
reset. See “Strapping Options” section for details.
24
GND
Gnd
25
VDDIO_3.3
P
3.3V digital VDD
26
VDDIO_3.3
P
3.3V digital VDD
RXDV /
Ipd/O
27
Receive Data Output[0]
Ground
MII Mode:
Receive Data Valid Output /
CRSDV /
RMII Mode:
Carrier Sense/Receive Data Valid Output /
CONFIG2
Config Mode:
The pull-up/pull-down value is latched as CONFIG2 during
power-up / reset. See “Strapping Options” section for details.
28
RXC
O
MII Mode:
Receive Clock Output
29
RXER /
Ipd/O
MII Mode:
Receive Error Output /
RMII Mode:
Receive Error Output /
Config Mode:
The pull-up/pull-down value is latched as ISOLATE during
power-up / reset. See “Strapping Options” section for details.
RX_ER /
ISO
30
GND
Gnd
31
VDD_1.8
P
32
INTRP
Opu
Ground
1.8V digital VDD
Interrupt Output: Programmable Interrupt Output
Register 1Bh is the Interrupt Control/Status Register for programming the
interrupt conditions and reading the interrupt status. Register 1Fh bit 9 sets the
interrupt output to active low (default) or active high.
33
34
TXC
TXEN /
I/O
I
TX_EN
35
36
TXD0 /
I
MII Mode:
Transmit Clock Output
MII Back-to Back Mode:
Transmit Clock Input
MII Mode:
Transmit Enable Input /
RMII Mode:
Transmit Enable Input
MII Mode:
Transmit Data Input[0]
(5)
/
(6)
/
TXD[0] /
RMII Mode:
Transmit Data Input[0]
TX
SMII Mode:
Transmit Data and Control
MII Mode:
Transmit Data Input[1]
TXD1 /
I
TXD[1] /
SYNC
37
GND
Gnd
38
TXD2
I
(7)
RMII Mode:
Transmit Data Input[1]
SMII Mode:
SYNC Clock Input
(5)
/
(6)
/
(5)
/
(5)
/
Ground
MII Mode:
Transmit Data Input[2]
39
TXD3
I
MII Mode:
Transmit Data Input[3]
40
COL /
Ipd/O
MII Mode:
Collision Detect Output /
Config Mode:
The pull-up/pull-down value is latched as CONFIG0 during
power-up / reset. See “Strapping Options” section for details.
MII Mode:
Carrier Sense Output /
Config Mode:
The pull-up/pull-down value is latched as CONFIG1 during
power-up / reset. See “Strapping Options” section for details.
CONFIG0
41
CRS /
CONFIG1
April 2007
Ipd/O
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M9999-042707-1.1
Micrel, Inc.
Pin Number
KSZ8041TL/FTL
Pin Name
42
LED0 /
(KSZ8041TL)
NWAYEN
(1)
Type
Ipu/O
Pin Function
LED Output:
Programmable LED0 Output /
Config Mode:
Latched as Auto-Negotiation Enable (register 0h, bit 12)
during power-up / reset. See “Strapping Options” section for
details.
The LED0 pin is programmable via register 1Eh bits [15:14], and is defined as
follows.
LED mode = [00]
Link/Activity
Pin State
LED Definition
No Link
H
OFF
Link
L
ON
Activity
Toggle
Blinking
Link
Pin State
LED Definition
No Link
H
OFF
Link
L
ON
LED mode = [01]
LED mode = [10]
Reserved
LED mode = [11]
Reserved
42
LED0 /
(KSZ8041FTL)
NWAYEN
Ipu/O
LED Output:
Programmable LED0 Output /
Config Mode:
If copper mode (FXEN=0), latched as Auto-Negotiation
Enable (register 0h, bit 12) during power-up / reset.
If fiber mode (FXEN=1), this pin configuration is always
strapped to disable Auto-Negotiation.
See “Strapping Options” section for details.
The LED0 pin is programmable via register 1Eh bits [15:14], and is defined as
follows.
LED mode = [00]
Link/Activity
Pin State
LED Definition
No Link
H
OFF
Link
L
ON
Activity
Toggle
Blinking
Link
Pin State
LED Definition
No Link
H
OFF
Link
L
ON
LED mode = [01]
LED mode = [10]
Reserved
LED mode = [11]
Reserved
April 2007
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Micrel, Inc.
Pin Number
KSZ8041TL/FTL
Pin Name
43
LED1 /
(KSZ8041TL)
SPEED
(1)
Type
Ipu/O
Pin Function
LED Output:
Programmable LED1 Output /
Config Mode:
Latched as SPEED (register 0h, bit 13) during power-up /
reset. See “Strapping Options” section for details.
The LED1 pin is programmable via register 1Eh bits [15:14], and is defined as
follows.
LED mode = [00]
Speed
Pin State
LED Definition
10BT
H
OFF
100BT
L
ON
Activity
Pin State
LED Definition
No Activity
H
OFF
Activity
Toggle
Blinking
LED mode = [01]
LED mode = [10]
Reserved
LED mode = [11]
Reserved
43
LED1 /
(KSZ8041FTL)
SPEED /
Ipu/O
LED Output:
Programmable LED1 Output /
Config Mode:
If copper mode (FXEN=0), latched as SPEED (register 0h, bit
13) during power-up / reset.
no FEF
If fiber mode (FXEN=1), latched as no FEF (no Far-End Fault)
during power-up / reset.
See “Strapping Options” section for details.
The LED1 pin is programmable via register 1Eh bits [15:14], and is defined as
follows.
LED mode = [00]
Speed
Pin State
LED Definition
10BT
H
OFF
100BT
L
ON
Pin State
LED Definition
LED mode = [01]
Activity
No Activity
H
OFF
Activity
Toggle
Blinking
LED mode = [10]
Reserved
LED mode = [11]
Reserved
44
NC
-
No connect
45
NC
-
No connect
46
NC
-
No connect
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
(1)
Pin Number
Pin Name
47
RST#
I
Chip Reset (active low)
48
NC
-
No connect
48
FXSD /
Ipd
(KSZ8041FTL)
FXEN
Type
Pin Function
(KSZ8041TL)
FXSD:
Signal Detect for 100Base-FX fiber mode
FXEN:
Fiber Enable for 100Base-FX fiber mode
If FXEN=0, fiber mode is disabled. PHY is in copper mode. The default is “0”.
See “100Base-FX Operation” section for details.
Notes:
1. P = Power supply.
Gnd = Ground.
I = Input.
O = Output.
I/O = Bi-directional.
Ipd = Input with internal pull-down (40K +/-30%).
Ipu = Input with internal pull-up (40K +/-30%).
Opu = Output with internal pull-up (40K +/-30%).
Ipu/O = Input with internal pull-up (40K +/-30%) during power-up/reset; output pin otherwise.
Ipd/O = Input with internal pull-down (40K +/-30%) during power-up/reset; output pin otherwise.
2. MII Rx Mode: The RXD[3..0] bits are synchronous with RXCLK. When RXDV is asserted, RXD[3..0] presents valid data to MAC through the MII.
RXD[3..0] is invalid when RXDV is de-asserted.
3. RMII Rx Mode: The RXD[1:0] bits are synchronous with REF_CLK. For each clock period in which CRS_DV is asserted, two bits of recovered
data are sent from the PHY.
4. SMII Rx Mode: Receive data and control information are sent in 10 bit segments. In 100MBit mode, each segment represents a new byte of
data. In 10MBit mode, each segment is repeated ten times; therefore, every ten segments represent a new byte of data. The MAC can sample
any one of every 10 segments in 10MBit mode.
5. MII Tx Mode: The TXD[3..0] bits are synchronous with TXCLK. When TXEN is asserted, TXD[3..0] presents valid data from the MAC through
the MII. TXD[3..0] has no effect when TXEN is de-asserted.
6. RMII Tx Mode: The TXD[1:0] bits are synchronous with REF_CLK. For each clock period in which TX_EN is asserted, two bits of data are
received by the PHY from the MAC.
7. SMII Tx Mode: Transmit data and control information are received in 10 bit segments. In 100MBit mode, each segment represents a new byte
of data. In 10MBit mode, each segment is repeated ten times; therefore, every ten segments represent a new byte of data. The PHY can
sample any one of every 10 segments in 10MBit mode.
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KSZ8041TL/FTL
Strapping Options
(1)
Pin Number
Pin Name
22
PHYAD2
Ipd/O
21
PHYAD1
Ipd/O
The PHY Address is latched at power-up / reset and is configurable to any value from
1 to 7.
20
PHYAD0
Ipu/O
The default PHY Address is 00001.
Type
Pin Function
PHY Address bits [4:3] are always set to ‘00’.
27
CONFIG2
Ipd/O
41
CONFIG1
Ipd/O
40
CONFIG0
Ipd/O
29
ISO
Ipd/O
The CONFIG[2:0] strap-in pins are latched at power-up / reset and are defined as
follows:
CONFIG[2:0]
Mode
000
MII (default)
001
RMII
010
SMII
011
Reserved – not used
100
PCS Loopback
101
RMII back-to-back
110
MII back-to-back
111
Reserved – not used
ISOLATE mode
Pull-up = Enable
Pull-down (default) = Disable
During power-up / reset, this pin value is latched into register 0h bit 10.
43
SPEED
Ipu/O
(KSZ8041TL)
SPEED mode
Pull-up (default) = 100Mbps
Pull-down = 10Mbps
During power-up / reset, this pin value is latched into register 0h bit 13 as the Speed
Select, and also is latched into register 4h (Auto-Negotiation Advertisement) as the
Speed capability support.
43
SPEED /
(KSZ8041FTL)
Ipu/O
If copper mode (FXEN=0), pin strap-in is SPEED mode.
Pull-up (default) = 100Mbps
Pull-down = 10Mbps
During power-up / reset, this pin value is latched into register 0h bit 13 as the Speed
Select, and also is latched into register 4h (Auto-Negotiation Advertisement) as the
Speed capability support.
no FEF
If fiber mode (FXEN=1), pin strap-in is no FEF.
Pull-up (default) = Enable Far-End Fault
Pull-down = Disable Far-End Fault
This pin value is latched during power-up / reset.
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Pin Number
Pin Name
23
DUPLEX
(1)
Type
Ipu/O
Pin Function
DUPLEX mode
Pull-up (default) = Half Duplex
Pull-down = Full Duplex
During power-up / reset, this pin value is latched into register 0h bit 8 as the Duplex
Mode.
42
NWAYEN
Ipu/O
(KSZ8041TL)
Nway Auto-Negotiation Enable
Pull-up (default) = Enable Auto-Negotiation
Pull-down = Disable Auto-Negotiation
During power-up / reset, this pin value is latched into register 0h bit 12.
42
(KSZ8041FTL)
NWAYEN
Ipu/O
If copper mode (FXEN=0), pin strap-in is Nway Auto-Negotiation Enable.
Pull-up (default) = Enable Auto-Negotiation
Pull-down = Disable Auto-Negotiation
During power-up / reset, this pin value is latched into register 0h bit 12.
If fiber mode (FXEN=1), this pin configuration is always strapped to disable AutoNegotiation.
Note:
1.
Ipu/O = Input with internal pull-up (40K +/-30%) during power-up/reset; output pin otherwise.
Ipd/O = Input with internal pull-down (40K +/-30%) during power-up/reset; output pin otherwise.
Pin strap-ins are latched during power-up or reset. In some systems, the MAC receive input pins may drive high during
power-up or reset, and consequently cause the PHY strap-in pins on the MII/RMII/SMII signals to be latched high. In this
case, it is recommended to add 1K pull-downs on these PHY strap-in pins to ensure the PHY does not strap-in to
ISOLATE or PCS Loopback mode, or is not configured with an incorrect PHY Address.
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KSZ8041TL/FTL
Functional Description
The KSZ8041TL is a single 3.3V supply Fast Ethernet transceiver. It is fully compliant with the IEEE 802.3u Specification.
On the media side, the KSZ8041TL supports 10Base-T and 100Base-TX with HP auto MDI/MDI-X for reliable detection of
and correction for straight-through and crossover cables.
The KSZ8041TL offers a choice of MII, RMII, or SMII data interface connection to a MAC processor. The MII management
bus option gives the MAC processor complete access to the KSZ8041TL control and status registers. Additionally, an
interrupt pin eliminates the need for the processor to poll for PHY status change.
Physical signal transmission and reception are enhanced through the use of patented analog circuitries that make the
design more efficient and allow for lower power consumption and smaller chip die size.
The KSZ8041FTL has all the identical rich features of the KSZ8041TL plus 100Base-FX fiber support.
100Base-TX Transmit
The 100Base-TX transmit function performs parallel-to-serial conversion, 4B/5B coding, scrambling, NRZ-to-NRZI
conversion, and MLT3 encoding and transmission.
The circuitry starts with a parallel-to-serial conversion, which converts the MII 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, and then transmitted in MLT3 current output.
The output current is set by an external 6.49 KΩ 1% resistor for the 1:1 transformer ratio. It has typical rise/fall times of 4
ns and complies with the ANSI TP-PMD standard regarding amplitude balance, overshoot and timing jitter. The waveshaped 10Base-T output drivers are also incorporated into the 100Base-TX drivers.
100Base-TX Receive
The 100Base-TX receiver function performs adaptive equalization, DC restoration, MLT3-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. Since the amplitude loss and phase distortion is 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 upon
comparisons of incoming signal strength against some known cable characteristics, and 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 is used to
compensate for the effect of baseline wander and to improve the dynamic range. The differential data conversion circuit
converts the MLT3 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 MII format and provided as the input data to the MAC.
PLL Clock Synthesizer
The KSZ8041TL/FTL generates 125 MΗz, 25 MΗz and 20 MΗz clocks for system timing. Internal clocks are generated
from an external 25 MHz crystal or oscillator. In RMII mode, these internal clocks are generated from an external 50 MHz
oscillator or system clock.
Scrambler/De-scrambler (100Base-TX only)
The purpose of the scrambler is to spread the power spectrum of the signal in order to reduce EMI and baseline wander.
10Base-T Transmit
The 10Base-T drivers are incorporated with the 100Base-TX drivers to allow for transmission using the same magnetic.
The drivers also perform internal wave-shaping and pre-emphasize, and output 10Base-T signals with a typical amplitude
of 2.5V peak. The 10Base-T signals have harmonic contents that are at least 27dB below the fundamental frequency
when driven by an all-ones Manchester-encoded signal.
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KSZ8041TL/FTL
10Base-T Receive
On the receive side, input buffer and level detecting squelch circuits are employed. A differential input receiver circuit and
a PLL performs 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 400 mV or with short pulse widths to prevent noise at the RX+ and
RX- inputs from falsely trigger the decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming
signal and the KSZ8041TL/FTL decodes a data frame. The receive clock is kept active during idle periods in between
data reception.
SQE and Jabber Function (10Base-T only)
In 10Base-T operation, a short pulse is put out on the COL pin after each frame is transmitted. This SQE Test is required
as a test of the 10Base-T transmit/receive path. If transmit enable (TXEN) is high for more than 20 ms (jabbering), the
10Base-T transmitter is disabled and COL is asserted high. If TXEN is then driven low for more than 250 ms, the 10BaseT transmitter is re-enabled and COL is de-asserted (returns to low).
Auto-Negotiation
The KSZ8041TL/FTL conforms to the auto-negotiation protocol, defined in Clause 28 of the IEEE 802.3u specification.
Auto-negotiation is enabled by either hardware pin strapping (pin 30) or software (register 0h bit 12).
Auto-negotiation allows unshielded twisted pair (UTP) link partners to select the highest common mode of operation. Link
partners advertise their capabilities 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 mode
of operation.
The following list shows the speed and duplex operation mode from highest to lowest.
•
Priority 1: 100Base-TX, full-duplex
•
Priority 2: 100Base-TX, half-duplex
•
Priority 3: 10Base-T, full-duplex
• Priority 4: 10Base-T, half-duplex
If auto-negotiation is not supported or the KSZ8041TL/FTL link partner is forced to bypass auto-negotiation, the
KSZ8041TL/FTL sets its operating mode by observing the signal at its receiver. This is known as parallel detection, and
allows the KSZ8041TL/FTL to establish link by listening for a fixed signal protocol in the absence of auto-negotiation
advertisement protocol.
The auto-negotiation link up process is shown in the following flow chart.
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KSZ8041TL/FTL
Start Auto Negotiation
Force Link Setting
N
o
Parallel
Operation
Yes
Bypass Auto Negotiation
and Set Link Mode
Attempt Auto
Negotiation
Listen for 100BASE-TX
Idles
Listen for 10BASE-T
Link Pulses
No
Join
Flow
Link Mode Set ?
Yes
Link Mode Set
Figure 1. Auto-Negotiation Flow Chart
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KSZ8041TL/FTL
MII Management (MIIM) Interface
The KSZ8041TL/FTL 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
KSZ8041TL/FTL. An external device with MIIM capability is used to read the PHY status and/or configure the PHY
settings. Further detail on the MIIM interface can be found in Clause 22.2.4.5 of the IEEE 802.3u 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 aforementioned physical connection that allows an external controller
to communicate with one or more KSZ8041TL/FTL devices. Each KSZ8041TL/FTL device is assigned a PHY
address between 1 and 7 by the PHYAD[2:0] strapping pins.
•
An internal addressable set of thirteen 16-bit MDIO registers. Register [0:6] are required, and their functions are
defined by the IEEE 802.3u Specification. The additional registers are provided for expanded functionality.
The KSZ8041TL/FTL supports MIIM in MII mode, RMII mode and SMII mode.
The following table shows the MII Management frame format for the KSZ8041TL/FTL.
Preamble
Start of
Frame
Read/Write
PHY
REG
OP Code
Address
Address
Bits [4:0]
Bits [4:0]
TA
Data
Idle
Bits [15:0]
Read
32 1’s
01
10
00AAA
RRRRR
Z0
DDDDDDDD_DDDDDDDD
Z
Write
32 1’s
01
01
00AAA
RRRRR
10
DDDDDDDD_DDDDDDDD
Z
Table 1. MII Management Frame Format
Interrupt (INTRP)
INTRP (pin 21) is an optional interrupt signal that is used to inform the external controller that there has been a status
update in the KSZ8041TL/FTL PHY register. Bits[15:8] of register 1Bh are the interrupt control bits, and are used to
enable and disable the conditions for asserting the INTRP signal. Bits[7:0] of register 1Bh are the interrupt status bits, and
are used to indicate which interrupt conditions have occurred. The interrupt status bits are cleared after reading register
1Bh.
Bit 9 of register 1Fh sets the interrupt level to active high or active low.
MII Data Interface
The Media Independent Interface (MII) is specified in Clause 22 of the IEEE 802.3u Specification. It provides a common
interface between physical layer and MAC layer devices, and has the following key characteristics:
•
Supports 10Mbps and 100Mbps data rates.
•
Uses a 25 MHz reference clock, sourced by the PHY.
•
Provides independent 4-bit wide (nibble) transmit and receive data paths.
•
Contains two distinct groups of signals: one for transmission and the other for reception.
By default, the KSZ8041TL/FTL is configured in MII mode after it is power-up or reset with the following:
•
A 25 MHz crystal connected to XI, XO (pins 15, 14), or an external 25MHz clock source (oscillator) connected to
XI.
•
CONFIG[2:0] (pins 27, 41, 40) set to ‘000’ (default setting).
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KSZ8041TL/FTL
MII Signal Definition
The following table describes the MII signals. Refer to Clause 22 of the IEEE 802.3u Specification for detailed information.
MII
Signal Name
Direction
(with respect to PHY,
KSZ8041TL/FTL signal)
Direction
(with respect to MAC)
Description
TXC
Output
Input
Transmit Clock
(2.5 MHz for 10Mbps; 25 MHz for 100Mbps)
TXEN
Input
Output
Transmit Enable
TXD[3:0]
Input
Output
Transmit Data [3:0]
RXC
Output
Input
Receive Clock
(2.5 MHz for 10Mbps; 25 MHz for 100Mbps)
RXDV
Output
Input
Receive Data Valid
RXD[3:0]
Output
Input
Receive Data [3:0]
RXER
Output
Input, or (not required)
Receive Error
CRS
Output
Input
Carrier Sense
COL
Output
Input
Collision Detection
Table 2. MII Signal Definition
Transmit Clock (TXC)
TXC is sourced by the PHY. It is a continuous clock that provides the timing reference for TXEN and TXD[3:0].
TXC is 2.5MHz for 10Mbps operation and 25MHz for 100Mbps operation.
Transmit Enable (TXEN)
TXEN indicates the MAC is presenting nibbles on TXD[3:0] for transmission. It is asserted synchronously with the first
nibble of the preamble and remains asserted while all nibbles to be transmitted are presented on the MII, and is negated
prior to the first TXC following the final nibble of a frame.
TXEN transitions synchronously with respect to TXC.
Transmit Data [3:0] (TXD[3:0])
TXD[3:0] transitions synchronously with respect to TXC. When TXEN is asserted, TXD[3:0] are accepted for transmission
by the PHY. TXD[3:0] is ”00” to indicate idle when TXEN is de-asserted. Values other than “00” on TXD[3:0] while TXEN
is de-asserted are ignored by the PHY.
Receive Clock (RXC)
RXC provides the timing reference for RXDV, RXD[3:0], and RXER.
•
In 10Mbps mode, RXC is recovered from the line while carrier is active. RXC is derived from the PHY’s reference
clock when the line is idle, or link is down.
•
In 100Mbps mode, RXC is continuously recovered from the line. If link is down, RXC is derived from the PHY’s
reference clock.
RXC is 2.5MHz for 10Mbps operation and 25MHz for 100Mbps operation.
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Receive Data Valid (RXDV)
RXDV is driven by the PHY to indicate that the PHY is presenting recovered and decoded nibbles on RXD[3:0].
•
In 10Mbps mode, RXDV is asserted with the first nibble of the SFD (Start of Frame Delimiter), “5D”, and remains
asserted until the end of the frame.
• In 100Mbps mode, RXDV is asserted from the first nibble of the preamble to the last nibble of the frame.
RXDV transitions synchronously with respect to RXC.
Receive Data [3:0] (RXD[3:0])
RXD[3:0] transitions synchronously with respect to RXC. For each clock period in which RXDV is asserted, RXD[3:0]
transfers a nibble of recovered data from the PHY.
Receive Error (RXER)
RXER is asserted for one or more RXC periods to indicate that a Symbol Error (e.g. a coding error that a PHY is capable
of detecting, and that may otherwise be undetectable by the MAC sub-layer) was detected somewhere in the frame
presently being transferred from the PHY.
RXER transitions synchronously with respect to RXC. While RXDV is de-asserted, RXER has no effect on the MAC.
Carrier Sense (CRS)
CRS is asserted and de-asserted as follows:
•
In 10Mbps mode, CRS assertion is based on the reception of valid preambles. CRS de-assertion is based on the
reception of an end-of-frame (EOF) marker.
•
In 100Mbps mode, CRS is asserted when a start-of-stream delimiter, or /J/K symbol pair is detected. CRS is deasserted when an end-of-stream delimiter, or /T/R symbol pair is detected. Additionally, the PMA layer de-asserts
CRS if IDLE symbols are received without /T/R.
Collision (COL)
COL is asserted in half-duplex mode whenever the transmitter and receiver are simultaneously active on the line. This is
used to inform the MAC that a collision has occurred during its transmission to the PHY.
COL transitions asynchronously with respect to TXC and RXC.
Reduced MII (RMII) Data Interface
The Reduced Media Independent Interface (RMII) specifies a low pin count Media Independent Interface (MII). It provides
a common interface between physical layer and MAC layer devices, and has the following key characteristics:
•
Supports 10Mbps and 100Mbps data rates.
•
Uses a single 50 MHz reference clock provided by the MAC or the system board.
•
Provides independent 2-bit wide (di-bit) transmit and receive data paths.
•
Contains two distinct groups of signals: one for transmission and the other for reception.
The KSZ8041TL/FTL is configured in RMII mode after it is power-up or reset with the following:
•
A 50 MHz reference clock connected to REFCLK (pin 15).
•
CONFIG[2:0] (pins 27, 41, 40) set to ‘001’.
In RMII mode, unused MII signals, TXD[3:2] (pins 39, 38), are tied to ground.
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KSZ8041TL/FTL
RMII Signal Definition
The following table describes the RMII signals. Refer to RMII Specification for detailed information.
RMII
Signal Name
Direction
(with respect to PHY,
KSZ8041TL/FTL signal)
Direction
(with respect to MAC)
REF_CLK
Input
Input, or Output
Synchronous 50 MHz clock reference for
receive, transmit and control interface
TX_EN
Input
Output
Transmit Enable
TXD[1:0]
Input
Output
Transmit Data [1:0]
CRS_DV
Output
Input
Carrier Sense/Receive Data Valid
RXD[1:0]
Output
Input
Receive Data [1:0]
RX_ER
Output
Input, or (not required)
Receive Error
Description
Table 3. RMII Signal Description
Reference Clock (REF_CLK)
REF_CLK is sourced by the MAC or system board. It is a continuous 50 MHz clock that provides the timing reference for
TX_EN, TXD[1:0], CRS_DV, RXD[1:0], and RX_ER.
Transmit Enable (TX_EN)
TX_EN indicates that the MAC is presenting di-bits on TXD[1:0] for transmission. It is asserted synchronously with the first
nibble of the preamble and remains asserted while all di-bits to be transmitted are presented on the RMII, and is negated
prior to the first REF_CLK following the final di-bit of a frame.
TX_EN transitions synchronously with respect to REF_CLK.
Transmit Data [1:0] (TXD[1:0])
TXD[1:0] transitions synchronously with respect to REF_CLK. When TX_EN is asserted, TXD[1:0] are accepted for
transmission by the PHY. TXD[1:0] is ”00” to indicate idle when TX_EN is de-asserted. Values other than “00” on TXD[1:0]
while TX_EN is de-asserted are ignored by the PHY.
Carrier Sense/Receive Data Valid (CRS_DV)
CRS_DV is asserted by the PHY when the receive medium is non-idle. It is asserted asynchronously on detection of
carrier. This is when squelch is passed in 10Mbps mode, and when 2 non-contiguous zeroes in 10 bits are detected in
100Mbps mode. Loss of carrier results in the de-assertion of CRS_DV.
So long as carrier detection criteria are met, CRS_DV remains asserted continuously from the first recovered di-bit of the
frame through the final recovered di-bit, and it is negated prior to the first REF_CLK that follows the final di-bit. The data
on RXD[1:0] is considered valid once CRS_DV is asserted. However, since the assertion of CRS_DV is asynchronous
relative to REF_CLK, the data on RXD[1:0] is "00" until proper receive signal decoding takes place.
Receive Data [1:0] (RXD[1:0])
RXD[1:0] transitions synchronously to REF_CLK. For each clock period in which CRS_DV is asserted, RXD[1:0] transfers
two bits of recovered data from the PHY. RXD[1:0] is "00" to indicate idle when CRS_DV is de-asserted. Values other
than “00” on RXD[1:0] while CRS_DV is de-asserted are ignored by the MAC.
Receive Error (RX_ER)
RX_ER is asserted for one or more REF_CLK periods to indicate that a Symbol Error (e.g. a coding error that a PHY is
capable of detecting, and that may otherwise be undetectable by the MAC sub-layer) was detected somewhere in the
frame presently being transferred from the PHY.
RX_ER transitions synchronously with respect to REF_CLK. While CRS_DV is de-asserted, RX_ER has no effect on the
MAC.
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Collision Detection
The MAC regenerates the COL signal of the MII from TX_EN and CRS_DV.
Serial MII (SMII) Data Interface
The Serial Media Independent Interface (SMII) is the lowest pin count Media Independent Interface (MII). It provides a
common interface between physical layer and MAC layer devices, and has the following key characteristics:
•
Supports 10Mbps and 100Mbps data rates.
•
Uses 125 MHz reference clock provided by the MAC or the system board.
•
Uses 12.5 MHz sync pulse provided by the MAC.
•
Provides independent single-bit wide transmit and receive data paths for data and control information.
The KSZ8041TL/FTL is configured in SMII mode after it is power-up or reset with the following:
•
A 125 MHz reference clock connected to CLOCK (pin 15).
•
A 12.5 MHz sync pulse connected to SYNC (pin 36).
•
CONFIG[2:0] (pins 27, 41, 40) set to ‘010’.
In SMII mode, unused MII signals, TXD[3:2] (pins 39, 38), are tied to ground.
SMII Signal Definition
The following table describes the SMII signals. Refer to SMII Specification for detailed information.
SMII
Signal Name
Direction
(with respect to PHY,
KSZ8041TL/FTL signal)
Direction
(with respect to MAC)
CLOCK
Input
Input, or Output
125 MHz clock reference for receive and
transmit data and control
SYNC
Input
Output
12.5 MHz sync pulse from MAC
TX
Input
Output
Transmit Data and Control
RX
Output
Input
Receive Data and Control
Description
Table 4. SMII Signal Description
Clock Reference (CLOCK)
CLOCK is sourced by the MAC or system board. It is a continuous 125 MHz clock that provides the timing reference for
SYNC, TX, and RX.
Sync Pulse (SYNC)
SYNC is a 12.5 MHz synchronized pulse derived from CLOCK by the MAC. It is used to indicate the segment boundary
for each transmit data/control segment, or receive data/control segment. Each segment is comprised of ten bits.
SYNC is generated continuously by the MAC at every ten cycles of CLOCK.
Transmit Data and Control (TX)
TX provides transmit data and control information from MAC-to-PHY in 10-bit segments.
•
In 10Mbps mode, each segment is repeated ten times. Therefore, every ten segments represent a new byte of
data. The PHY can sample any one of every ten segments.
•
In 100Mbps mode, each segment represents a new byte of data.
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The following figure and table shows the transmit data/control format for each segment:
CLOCK
SYNC
TX
TX_ER
TX_EN
TXD0
TXD1
TXD2
TXD3
TXD4
TXD5
TXD6
TXD7
Figure 2. SMII Transmit Data/Control Segment
SMII TX Bit
Description
TX_ER
Transmit Error
TX_EN
Transmit Enable
TXD[0:7]
Encoded Data
See SMII TXD[0:7] Encoding Table (below)
Table 5. SMII TX Bit Description
TX_ER
TX_EN
TXD0
TXD1
TXD2
TXD3
TXD4
TXD5
TXD6
TXD7
X
0
Use to
force an
error in a
direct
MAC-toMAC
connection
Speed
Duplex
Link
Jabber
1
1
1
0=10M
1=100M
0=Half
1=Full
0=Down
1=Up
0=No
1=Yes
X
1
One Data Byte
Table 6. SMII TXD[0:7] Encoding Table
Receive Data and Control (RX)
RX provides receive data and control information from PHY-to-MAC in 10-bit segments.
•
In 10Mbps mode, each segment is repeated ten times. Therefore, every ten segments represent a new byte of
data. The MAC can sample any one of every ten segments.
•
In 100Mbps mode, each segment represents a new byte of data.
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KSZ8041TL/FTL
The following figure and table shows the receive data/control format for each segment:
CLOCK
SYNC
RX
CRS
RX_DV
RXD0
RXD1
RXD2
RXD3
RXD4
RXD5
RXD6
RXD7
Figure 3. SMII Receive Data/Control Segment
SMII RX Bit
Description
CRS
Carrier Sense
RX_DV
Receive Data Valid
RXD[0:7]
Encoded Data
See SMII RXD[0:7] Encoding Table (below)
Table 7. SMII RX Bit Description
CRS
RX_DV
RXD0
RXD1
RXD2
RXD3
RXD4
RXD5
RXD6
RXD7
X
0
RX_ER
from
pervious
frame
Speed
Duplex
Link
Jabber
0=Half
1=Full
0=Down
1=Up
0=No
1=Yes
False
Carrier
Detected
1
0=10M
1=100M
Upper
Nibble
X
1
0=Invalid
1=Valid
One Data Byte
Table 8. SMII RXD[0:7] Encoding Table
Collision Detection
Collisions occur when CRS and TX_EN are simultaneously asserted. The MAC regenerates the MII collision signal from
CRS and TX_EN.
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KSZ8041TL/FTL
HP Auto MDI/MDI-X
HP Auto MDI/MDI-X configuration eliminates the confusion of whether to use a straight cable or a crossover cable
between the KSZ8041TL/FTL and its link partner. This feature allows the KSZ8041TL/FTL to use either type of cable to
connect with a link partner that is in either MDI or MDI-X mode. The auto-sense function detects transmit and receive
pairs from the link partner, and then assigns transmit and receive pairs of the KSZ8041TL/FTL accordingly.
HP Auto MDI/MDI-X is enabled by default. It is disabled by writing a one to register 1F bit 13. MDI and MDI-X mode is
selected by register 1F bit 14 if HP Auto MDI/MDI-X is disabled.
An isolation transformer with symmetrical transmit and receive data paths is recommended to support auto MDI/MDI-X.
The IEEE 802.3u Standard defines MDI and MDI-X as follow:
MDI
MDI-X
RJ-45 Pin
Signal
RJ-45 Pin
Signal
1
TD+
1
RD+
2
TD-
2
RD-
3
RD+
3
TD+
6
RD-
6
TD-
Table 9. MDI/MDI-X Pin Definition
Straight Cable
A straight cable connects a MDI device to a MDI-X device, or a MDI-X device to a MDI device. The following diagram
depicts a typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X).
10/100 Ethernet
Media Dependent Interface
10/100 Ethernet
Media Dependent Interface
1
1
2
2
Transmit Pair
Receive Pair
3
Straight
Cable
3
4
4
5
5
6
6
7
7
8
8
Receive Pair
Transmit Pair
Modular Connector
(RJ-45)
HUB
(Repeater or Switch)
Modular Connector
(RJ-45)
NIC
Figure 4. Typical Straight Cable Connection
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KSZ8041TL/FTL
Crossover Cable
A crossover cable connects a MDI device to another MDI device, or a MDI-X device to another MDI-X device. The
following diagram depicts a typical crossover cable connection between two switches or hubs (two MDI-X devices).
10/100 Ethernet
Media Dependent Interface
1
Receive Pair
10/100 Ethernet
Media Dependent Interface
Crossover
Cable
1
Receive Pair
2
2
3
3
4
4
5
5
6
6
7
7
8
8
Transmit Pair
Transmit Pair
Modular Connector (RJ-45)
HUB
(Repeater or Switch)
Modular Connector (RJ-45)
HUB
(Repeater or Switch)
Figure 5. Typical Crossover Cable Connection
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KSZ8041TL/FTL
LinkMD® Cable Diagnostics
The LinkMD® feature utilizes time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems,
such as open circuits, short circuits and impedance mismatches.
LinkMD® works by sending a pulse of known amplitude and duration down the MDI and MDI-X pairs, and then analyzing
the shape of the reflected signal. Timing the pulse duration gives an indication of the distance to the cabling fault with
maximum distance of 200m and accuracy of +/-2m. Internal circuitry computes the TDR information and presents it in a
user-readable digital format.
Note: Cable diagnostics are only valid for copper connections and do not support fiber optic operation.
Access
LinkMD® is initiated by accessing register 1Dh, the LinkMD® Control/Status Register, in conjunction with register 1Fh, the
PHY Control 2 Register.
Usage
The following test procedure demonstrates how to use LinkMD® for cable diagnostic:
1. Disable auto MDI/MDI-X by writing a ‘1’ to register 1Fh bit 13 to enable manual control over the differential pair
used to transmit the LinkMD® pulse.
2. Select the differential pair to transmit the LinkMD® pulse with register 1Fh bit 14.
3. Start cable diagnostic test by writing a ‘1’ to register 1Dh bit 15. This enable bit is self-clearing.
4. Wait (poll) for register 1Dh bit 15 to return a ‘0’, indicating cable diagnostic test is completed.
5. Read cable diagnostic test results in register 1Dh bits [14:13]. The results are as follows:
00 = normal condition (valid test)
01 = open condition detected in cable (valid test)
10 = short condition detected in cable (valid test)
11 = cable diagnostic test failed (invalid test)
The ‘11’ case, invalid test, occurs if the KSZ8041TL/FTL is unable to shut down the link partner. In this instance,
the test is not run, since it would be impossible for the KSZ8041TL/FTL to determine if the detected signal is a
reflection of the signal generated by the KSZ8041TL/FTL, or a signal from its link partner.
6. Get distance to fault by multiplying the decimal value in register 1Dh bits [8:0] by a constant of 0.4. The distance,
D (expressed in meters), to the cable fault is determined by the following formula:
D (distance to cable fault) = 0.4 x {decimal value of register 1Dh bits [8:0]}
The 0.4 constant can be calibrated for different cable types and cabling conditions, such as cables with velocity of
propagation that varies significantly from the norm.
Power Management
The KSZ8041TL/FTL offers the following power management modes:
Power Saving Mode
This mode is used to reduce power consumption when the cable is unplugged. It is in effect when auto-negotiation mode
is enabled, cable is disconnected, and register 1Fh bit 10 is set to 1 (default setting). Under power saving mode, the
KSZ8041TL/FTL shuts down all transceiver blocks, except for energy detect and PLL circuits. Additionally, in MII mode,
the RXC clock output is disabled. RXC clock is enabled after the cable is connected and link is established.
Power saving mode is disabled by writing a zero to register 1Fh bit 10.
Power Down Mode
This mode is used to power down the entire KSZ8041TL/FTL device when it is not in use. Power down mode is enabled
by writing a one to register 0h bit 11. In the power down state, the KSZ8041TL/FTL disables all internal functions, except
for the MII management interface.
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KSZ8041TL/FTL
Reference Clock Connection Options
A crystal or clock source, such as an oscillator, is used to provide the reference clock for the KSZ8041TL/FTL. The
reference clock is 25 MHz for MII mode, 50 MHz for RMII mode, and 125 MHz for SMII mode. The following three figures
illustrate how to connect the reference clock to XI / REFCLK / CLOCK (pin 9) and XO (pin 8) of the KSZ8041TL/FTL.
22pF
22pF
XI
XI
25MHz OSC
+/-50ppm
22pF
22pF
XO
NC
XO
NC
25MHz XTAL
+/-50ppm
Figure 6. 25MHz Crystal / Oscillator Reference Clock for MII Mode
Figure 7. 50MHz Oscillator Reference Clock for RMII Mode
CLOCK
125MHz OSC
+/-100ppm
NC
XO
NC
Figure 8. 125MHz Oscillator Reference Clock for SMII Mode
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KSZ8041TL/FTL
Reference Circuit for Power and Ground Connections
The KSZ8041TL/FTL is a single 3.3V supply device with a built-in 1.8V low noise regulator. The power and ground
connections are shown in the following figure and table.
Figure 9. KSZ8041TL/FTL Power and Ground Connections
Power Pin
Pin Number
Pin Type
V1.8_OUT
6
Output
VDD_1.8
31
Input
Description
1.8V supply output from KSZ8041TL/FTL
Decouple with 22uF and 0.1uF capacitors-to-ground.
Connect to V1.8_OUT (pin 6) thru ferrite bead.
Decouple with 0.1uF capacitor-to-ground.
VDDA_1.8
4, 5
Input
Connect to V1.8_OUT (pin 6) thru ferrite bead.
Decouple with 0.1uF capacitor on each pin-to-ground.
VDDIO_3.3
25, 26
Input
VDDA_3.3
7, 8
Input
Connect to board’s 3.3V supply.
Decouple with 22uF and 0.1uF capacitors-to-ground.
Connect to board’s 3.3V supply thru ferrite bead.
Decouple with 22uF and 0.1uF capacitors-to-ground.
Table 10. KSZ8041TL/FTL Power Pin Description
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KSZ8041TL/FTL
100Base-FX Fiber Operation (KSZ8041FTL only)
100Base-FX fiber operation is similar to 100Base-TX copper operation with the differences being that the scrambler/descrambler and MLT3 encoder/decoder are bypassed on transmission and reception. In addition, auto-negotiation is
bypassed, auto MDI/MDI-X is disabled, and speed is set to 100Mbps. The duplex can be set to either half or full. Usually,
it is set to full-duplex.
Fiber Signal Detect
In 100Base-FX operation, FXSD (fiber signal detect), input pin 48, is usually connected to the fiber transceiver SD (signal
detect) output pin. 100Base-FX mode is activated when the FXSD input pin is greater than 1V. When FXSD is between
1V and 1.8V, no fiber signal is detected and a Far-End Fault is generated. When FXSD is over 2.2V, the fiber signal is
detected.
100Base-FX mode and signal detection is summarized in the following table:
FXSD Input Voltage
Mode
Less than 0.2V
Copper mode
Greater than 1V, but less than 1.8V
Fiber mode
No signal detected
Far-End Fault generated (if enabled)
Greater than 2.2V
Fiber mode
Signal detected
Table 11. Copper and Fiber Mode Selection
To ensure proper operation, a resistive voltage divider is recommended to adjust the fiber transceiver SD (signal detect)
output voltage swing to match the FXSD pin’s input voltage threshold.
Alternatively, the Far-End Fault feature can be disabled. In this case, the FXSD input pin is tied high to 3.3V to force
100Base-FX mode.
Far-End Fault
A Far-End Fault (FEF) occurs when the signal detection is logically false on the receive side of the fiber transceiver. The
KSZ8041FTL detects a FEF when its FXSD input (pin 48) is between 1V and 1.8V. When a FEF is detected, the
KSZ8041FTL signals its fiber link partner that a FEF has occurred by transmitting a repetitive pattern of 84-ones and 1zero. This pattern is used to inform the fiber link partner that there is a faulty link on its transmit side.
By default, FEF is enabled. FEF is disabled by strapping “no FEF” (pin 43) low. See “Strapping Options” section for detail.
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KSZ8041TL/FTL
Back-to-Back Media Converter
A KSZ8041FTL and a KSZ8041TL can be connected back-to-back to provide a low cost media converter solution. In
back-to-back mode, media conversion is between 100Base-FX fiber and 100Base-TX copper. On the copper side, link up
at 10Base-T is not allowed, and is blocked during auto-negotiation.
Figure 10. KSZ8041FTL / KSZ8041TL Back-to-Back Media Converter
The KSZ8041FTL and KSZ8041TL support MII Back-to-Back mode and RMII Back-to-Back mode for media conversion.
MII Back-to-Back Mode
The KSZ8041FTL and KSZ8041TL are configured in MII Back-to-Back mode after it is power-up or reset with the following:
•
CONFIG[2:0] (pins 27, 41, 40) set to ‘110’ for both KSZ8041FTL and KSZ8041TL.
•
A common 25 MHz reference clock connected to XI (pin 15) of both KSZ8041FTL and KSZ8041TL.
•
MII signals connected as shown in the following table between KSZ8041FTL in fiber mode and KSZ8041TL in
copper mode.
KSZ8041FTL in fiber mode
Pin Name
KSZ8041TL in copper mode
Pin Number
Pin Type
Pin Name
Pin Number
Pin Type
RXC
28
Output
TXC
33
Input
RXDV
27
Output
TXEN
34
Input
RXD3
20
Output
TXD3
39
Input
RXD2
21
Output
TXD2
38
Input
RXD1
22
Output
TXD1
36
Input
RXD0
23
Output
TXD0
35
Input
TXC
33
Input
RXC
28
Output
TXEN
34
Input
RXDV
27
Output
TXD3
39
Input
RXD3
20
Output
TXD2
38
Input
RXD2
21
Output
TXD1
36
Input
RXD1
22
Output
TXD0
35
Input
RXD0
23
Output
Table 12. MII Signal Connection for MII Back-to-Back Mode
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KSZ8041TL/FTL
RMII Back-to-Back Mode
The KSZ8041FTL and KSZ8041TL are configured in RMII Back-to-Back mode after it is power-up or reset with the
following:
•
CONFIG[2:0] (pins 27, 41, 40) set to ‘101’ for both KSZ8041FTL and KSZ8041TL.
•
A common 50 MHz reference clock connected to REFCLK (pin 15) of both KSZ8041FTL and KSZ8041TL.
•
RMII signals connected as shown in the following table between KSZ8041FTL in fiber mode and KSZ8041TL in
copper mode.
KSZ8041FTL in fiber mode
KSZ8041TL in copper mode
Pin Name
Pin Number
Pin Type
Pin Name
Pin Number
Pin Type
CRSDV
27
Output
TXEN
34
Input
RXD1
22
Output
TXD1
36
Input
RXD0
23
Output
TXD0
35
Input
TXEN
34
Input
CRSDV
27
Output
TXD1
36
Input
RXD1
22
Output
TXD0
35
Input
RXD0
23
Output
Table 13. RMII Signal Connection for RMII Back-to-Back Mode
RMII Back-to-Back mode provides the option to disable and tri-state the transmitter on both copper and fiber sides if the
cable is disconnected on the copper side. On the copper side, RXD2 (pin 21) indicates if there is energy detected at the
receive inputs of the UTP port. RXD2 outputs a low if there is no energy detected (cable disconnected), and outputs a
high if there is energy detected (cable connected). The RXD2 output is connected thru an inverter to drive TXD2 (pin 38)
input high to disable and tri-state the transmitters for both copper and fiber sides.
The TXD3 and TXD2 pins should be pulled down with 1K resistors, and RXD3 and RXD2 pins should be left floating, if
they are not used.
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KSZ8041TL/FTL
Register Map
Register Number (Hex)
Description
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
Link Partner Next Page Ability
9h – 14h
Reserved
15h
RXER Counter
16h – 1Ah
Reserved
1Bh
Interrupt Control/Status
1Ch
Reserved
1Dh
LinkMD® Control/Status
1Eh
PHY Control 1
1Fh
PHY Control 2
Register Description
Address
Name
(1)
Description
Mode
Default
1 = Software reset
RW/SC
0
RW
0
RW
Set by SPEED strapping pin.
Register 0h – Basic Control
0.15
Reset
0 = Normal operation
This bit is self-cleared after a ‘1’ is written to it.
0.14
Loop-back
1 = Loop-back mode
0 = Normal operation
0.13
Speed Select
(LSB)
1 = 100Mbps
See “Strapping Options” section
for details.
0 = 10Mbps
This bit is ignored if auto-negotiation is enabled
(register 0.12 = 1).
0.12
0.11
AutoNegotiation
Enable
1 = Enable auto-negotiation process
Power Down
1 = Power down mode
RW
Set by NWAYEN strapping pin.
See “Strapping Options” section
for details.
0 = Disable auto-negotiation process
If enabled, auto-negotiation result overrides
settings in register 0.13 and 0.8.
RW
0
RW
Set by ISO strapping pin.
0 = Normal operation
0.10
Isolate
1 = Electrical isolation of PHY from MII and
TX+/TX-
See “Strapping Options” section
for details.
0 = Normal operation
0.9
Restart AutoNegotiation
1 = Restart auto-negotiation process
RW/SC
0
0 = Normal operation.
This bit is self-cleared after a ‘1’ is written to it.
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KSZ8041TL/FTL
(1)
Address
Name
Description
Mode
0.8
Duplex Mode
1 = Full-duplex
RW
Collision Test
Set by DUPLEX strapping pin.
See “Strapping Options” section
for details.
0 = Half-duplex
0.7
Default
1 = Enable COL test
RW
0
RO
000_000
RW
0
RO
0
RO
1
RO
1
RO
1
RO
1
RO
0000
RO
1
RO
0
RO/LH
0
RO
1
RO/LL
0
RO/LH
0
1 = Supports extended capabilities registers
RO
1
Assigned to the 3rd through 18th bits of the
Organizationally Unique Identifier (OUI).
Kendin Communication’s OUI is 0010A1 (hex)
RO
0022h
0 = Disable COL test
0.6:1
Reserved
0.0
Disable
0 = Enable transmitter
Transmitter
1 = Disable transmitter
Register 1h – Basic Status
1.15
100Base-T4
1 = T4 capable
0 = Not T4 capable
1.14
100Base-TX
Full Duplex
1 = Capable of 100Mbps full-duplex
1.13
100Base-TX
Half Duplex
1 = Capable of 100Mbps half-duplex
10Base-T Full
Duplex
1 = Capable of 10Mbps full-duplex
1.11
10Base-T Half
Duplex
1 = Capable of 10Mbps half-duplex
1.10:7
Reserved
1.6
No Preamble
1.5
AutoNegotiation
Complete
1 = Auto-negotiation process completed
1.4
Remote Fault
1 = Remote fault
1.3
AutoNegotiation
Ability
1 = Capable to perform auto-negotiation
Link Status
1 = Link is up
1.12
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
1 = Preamble suppression
0 = Normal preamble
0 = Auto-negotiation process not completed
0 = No remote fault
1.2
0 = Not capable to perform auto-negotiation
0 = Link is down
1.1
Jabber Detect
1 = Jabber detected
0 = Jabber not detected (default is low)
1.0
Extended
Capability
Register 2h – PHY Identifier 1
2.15:0
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PHY ID
Number
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Address
KSZ8041TL/FTL
Name
(1)
Description
Mode
Default
Register 3h – PHY Identifier 2
3.15:10
PHY ID
Number
Assigned to the 19th through 24th bits of the
Organizationally Unique Identifier (OUI).
Kendin Communication’s OUI is 0010A1 (hex)
RO
0001_01
3.9:4
Model Number
Six bit manufacturer’s model number
RO
01_0001
3.3:0
Revision
Number
Four bit manufacturer’s model number
RO
0010
RW
0
RO
0
RW
0
RO
00
RW
0
RO
0
RW
Set by SPEED strapping pin.
Register 4h – Auto-Negotiation Advertisement
4.15
Next Page
1 = Next page capable
4.14
Reserved
4.13
Remote Fault
4.12:11
Reserved
4.10
Pause
1 = PAUSE function supported
4.9
100Base-T4
1 = T4 capable
0 = No next page capability.
1 = Remote fault supported
0 = No remote fault
0 = No PAUSE function supported
0 = No T4 capability
4.8
4.7
4.6
4.5
4.4:0
100Base-TX
Full-Duplex
1 = 100Mbps full-duplex capable
100Base-TX
Half-Duplex
1 = 100Mbps half-duplex capable
10Base-T
Full-Duplex
1 = 10Mbps full-duplex capable
10Base-T
Half-Duplex
1 = 10Mbps half-duplex capable
Selector Field
[00001] = IEEE 802.3
See “Strapping Options” section
for details.
0 = No 100Mbps full-duplex capability
RW
Set by SPEED strapping pin.
See “Strapping Options” section
for details.
0 = No 100Mbps half-duplex capability
RW
1
RW
1
RW
0_0001
RO
0
RO
0
RO
0
RO
0
RO
00
0 = No 10Mbps full-duplex capability
0 = No 10Mbps half-duplex capability
Register 5h – Auto-Negotiation Link Partner Ability
5.15
Next Page
1 = Next page capable
0 = No next page capability
5.14
Acknowledge
1 = Link code word received from partner
0 = Link code word not yet received
5.13
Remote Fault
5.12
Reserved
5.11:10
Pause
1 = Remote fault detected
0 = No remote fault
[00] = No PAUSE
[10] = Asymmetric PAUSE
[01] = Symmetric PAUSE
[11] = Asymmetric & Symmetric PAUSE
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KSZ8041TL/FTL
(1)
Address
Name
Description
Mode
Default
5.9
100Base-T4
1 = T4 capable
RO
0
5.8
100Base-TX
Full-Duplex
1 = 100Mbps full-duplex capable
RO
0
100Base-TX
Half-Duplex
1 = 100Mbps half-duplex capable
RO
0
10Base-T
Full-Duplex
1 = 10Mbps full-duplex capable
RO
0
5.5
10Base-T
Half-Duplex
1 = 10Mbps half-duplex capable
RO
0
5.4:0
Selector Field
[00001] = IEEE 802.3
RO
0_0001
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
RW
000_0000_0001
RO
0
0 = No T4 capability
5.7
5.6
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
6.4
Parallel
Detection Fault
1 = Fault detected by parallel detection
Link Partner
Next Page
Able
1 = Link partner has next page capability
Next Page
Able
1 = Local device has next page capability
Page Received
1 = New page received
6.3
6.2
6.1
0 = No fault detected by parallel detection.
0 = Link partner does not have next page
capability
0 = Local device does not have next page
capability
0 = New page not received yet
6.0
Link Partner
AutoNegotiation
Able
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
1 = Additional next page(s) will follow
0 = Last page
1 = Message page
0 = Unformatted page
7.12
Acknowledge2
1 = Will comply with message
0 = Cannot comply with message
7.11
Toggle
1 = Previous value of the transmitted link code
word equaled logic one
0 = Logic zero
7.10:0
Message Field
11-bit wide field to encode 2048 messages
Register 8h – Link Partner Next Page Ability
8.15
Next Page
1 = Additional Next Page(s) will follow
0 = Last page
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KSZ8041TL/FTL
(1)
Address
Name
Description
Mode
Default
8.14
Acknowledge
1 = Successful receipt of link word
RO
0
8.13
Message Page
1 = Message page
RO
0
RO
0
RO
0
RO
000_0000_0000
RO/SC
0000h
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RO/SC
0
RO/SC
0
RO/SC
0
RO/SC
0
0 = No successful receipt of link word
0 = Unformatted page
8.12
Acknowledge2
1 = Able to act on the information
0 = Not able to act on the information
8.11
Toggle
1 = Previous value of transmitted link code
word equal to logic zero
0 = Previous value of transmitted link code
word equal to logic one
8.10:0
Message Field
Register 15h – RXER Counter
15.15:0
RXER Counter
Receive error counter for Symbol Error frames
Register 1Bh – Interrupt Control/Status
Jabber
Interrupt
Enable
1 = Enable Jabber Interrupt
Receive Error
Interrupt
Enable
1 = Enable Receive Error Interrupt
Page Received
Interrupt
Enable
1 = Enable Page Received Interrupt
Parallel Detect
Fault Interrupt
Enable
1 = Enable Parallel Detect Fault Interrupt
Link Partner
Acknowledge
Interrupt
Enable
1 = Enable Link Partner Acknowledge Interrupt
Link Down
Interrupt
Enable
1 = Enable Link Down Interrupt
Remote Fault
Interrupt
Enable
1 = Enable Remote Fault Interrupt
Link Up
Interrupt
Enable
1 = Enable Link Up Interrupt
Jabber
Interrupt
1 = Jabber occurred
1b.6
Receive Error
Interrupt
1 = Receive Error occurred
1b.5
Page Receive
Interrupt
1 = Page Receive occurred
Parallel Detect
Fault Interrupt
1 = Parallel Detect Fault occurred
1b.15
1b.14
1b.13
1b.12
1b.11
1b.10
1b.9
1b.8
1b.7
1b.4
April 2007
0 = Disable Jabber Interrupt
0 = Disable Receive Error Interrupt
0 = Disable Page Received Interrupt
0 = Disable Parallel Detect Fault 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 occurred
0 = Receive Error did not occurred
0 = Page Receive did not occurred
0 = Parallel Detect Fault did not occurred
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
(1)
Address
Name
Description
Mode
Default
1b.3
Link Partner
Acknowledge
Interrupt
1 = Link Partner Acknowledge occurred
RO/SC
0
Link Down
Interrupt
1 = Link Down occurred
RO/SC
0
1b.1
Remote Fault
Interrupt
1 = Remote Fault occurred
RO/SC
0
1b.0
Link Up
Interrupt
1 = Link Up occurred
RO/SC
0
RW/SC
0
RO
00
1b.2
0 = Link Partner Acknowledge did not occurred
0 = Link Down did not occurred
0 = Remote Fault did not occurred
0 = Link Up did not occurred
Register 1Dh – LinkMD® Control/Status
1d.15
1d.14:13
Cable
Diagnostic
Test Enable
1 = Enable cable diagnostic test. After test
has completed, this bit is self-cleared.
Cable
Diagnostic
Test Result
[00] = normal condition
0 = Indicates cable diagnostic test (if enabled)
has completed and the status information
is valid for read.
[01] = open condition has been detected in
cable
[10] = short condition has been detected in
cable
[11] = cable diagnostic test has failed
1d.12:9
Reserved
1d.8:0
Cable Fault
Counter
0000
Distance to fault; it’s approximately
RO
0_0000_0000
RW
00
0.4m*(Cable Fault Counter value in decimal)
Register 1Eh – PHY Control 1
1e.15:14
LED mode
[00] = LED1 : Speed
LED0 : Link/Activity
[01] = LED1 : Activity
LED0 : Link
[10] = Reserved
[11] = Reserved
1e.13
Polarity
0 = Polarity is not reversed
RO
1 = Polarity is reversed
1e.12
Far-End Fault
Detect
0 = Far-End Fault not detected
RO
0
1 = Far-End Fault detected
This bit applies to KSZ8041FTL fiber only.
1e.11
MDI/MDI-X
State
1e.10:8
Reserved
1e.7
Remote
loopback
1e.6:0
Reserved
April 2007
0 = MDI
RO
1 = MDI-X
0 = Normal mode
RW
0
1 = Remote (analog) loop back is enable
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M9999-042707-1.1
Micrel, Inc.
Address
KSZ8041TL/FTL
Name
(1)
Description
Mode
Default
0 = Micrel Auto MDI/MDI-X mode
RW
1
RW
0
RW
0
RO
0
RW
0
RW
0
RW
0
RW
1
RO
0
RO
0
RO
0
RO
000
RW
0
Register 1Fh – PHY Control 2
1f.15
HP_MDIX
1 = HP Auto MDI/MDI-X mode
1f.14
MDI/MDI-X
Select
When Auto MDI/MDI-X is disabled,
0 = MDI Mode
Transmit on TX+/- (pins 12,11) and
Receive on RX+/- (pins 10,9)
1 = MDI-X Mode
Transmit on RX+/- (pins 10,9) and
Receive on TX+/- (pins 12,11)
Pairswap
Disable
1 = Disable auto MDI/MDI-X
1f.12
Energy Detect
1 = Presence of signal on RX+/- analog wire
pair
1f.11
Force Link
1 = Force link pass
1f.13
0 = Enable auto MDI/MDI-X
0 = No signal detected on RX+/0 = Normal link operation
This bit bypasses the control logic and allow
transmitter to send pattern even if there is no
link.
1f.10
Power Saving
1 = Enable power saving
0 = Disable power saving
If power saving mode is enabled and the cable
is disconnected, the RXC clock output (in MII
mode) is disabled. RXC clock is enabled after
the cable is connected and link is established.
1f.9
Interrupt Level
1f.8
Enable Jabber
1 = Interrupt pin active high
0 = Interrupt pin active low
1 = Enable jabber counter
0 = Disable jabber counter
1f.7
1f.6
1f.5
AutoNegotiation
Complete
1 = Auto-negotiation process completed
Enable Pause
(Flow Control)
1 = Flow control capable
PHY Isolate
1 = PHY in isolate mode
0 = Auto-negotiation process not completed
0 = No flow control capability
0 = PHY in normal operation
1f.4:2
Operation
Mode
Indication
[000] = still in auto-negotiation
[001] = 10Base-T half-duplex
[010] = 100Base-TX half-duplex
[011] = reserved
[101] = 10Base-T full-duplex
[110] = 100Base-TX full-duplex
[111] = reserved
1f.1
April 2007
Enable SQE
test
1 = Enable SQE test
0 = Disable SQE test
41
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
(1)
Address
Name
Description
Mode
Default
1f.0
Disable Data
Scrambling
1 = Disable scrambler
RW
0
0 = Enable scrambler
Note:
1.
RW = Read/Write.
RO = Read only.
SC = Self-cleared.
LH = Latch high.
LL = Latch low.
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage
(VDD_1.8, VDDA_1.8, V1.8_OUT) ........................ -0.5V to +2.4V
(VDDIO_3.3, VDDA_3.3) ................................... -0.5V to +4.0V
Input Voltage (all inputs) ............................... -0.5V to +4.0V
Output Voltage (all outputs) .......................... -0.5V to +4.0V
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (Ts) ..........................-55°C to +150°C
Supply Voltage
(VDDIO_3.3, VDDA_3.3) .......................... +3.135V to +3.465V
Ambient Temperature (TA) .............................. 0°C to +70°C
Maximum Junction Temperature (TJ Max) ................. 125°C
Thermal Resistance (θJA) ....................................69.64°C/W
Electrical Characteristics(3)
Symbol
Parameter
Condition
Min
Typ
Max
Units
(4)
Supply Current
IDD1
100Base-TX
Chip only (no transformer);
53
mA
38
mA
Full-duplex traffic @ 100% utilization
IDD2
10Base-T
Chip only (no transformer);
IDD3
Power Saving Mode
Ethernet cable disconnected (reg. 1F.10 = 1)
32
mA
IDD4
Power Down Mode
Software power down (reg. 0.11 = 1)
4
mA
Full-duplex traffic @ 100% utilization
TTL Inputs
VIH
Input High Voltage
VIL
Input Low Voltage
IIN
Input Current
2.0
VIN = GND ~ VDDIO
V
-10
0.8
V
10
µA
TTL Outputs
VOH
Output High Voltage
IOH = -4mA
VOL
Output Low Voltage
IOL = 4mA
|Ioz|
Output Tri-State Leakage
2.4
V
0.4
V
10
µA
1.05
V
2
%
100Base-TX Transmit (measured differentially after 1:1 transformer)
VO
Peak Differential Output Voltage
100Ω termination across differential output
0.95
VIMB
Output Voltage Imbalance
100Ω termination across differential output
tr, tf
Rise/Fall Time
3
5
ns
Rise/Fall Time Imbalance
0
0.5
ns
± 0.25
ns
5
%
Duty Cycle Distortion
Overshoot
VSET
0.65
Reference Voltage of ISET
Output Jitter
0.7
Peak-to-peak
V
1.4
ns
2.8
V
3.5
ns
10Base-T Transmit (measured differentially after 1:1 transformer)
VP
tr, tf
Peak Differential Output Voltage
100Ω termination across differential output
Jitter Added
Peak-to-peak
Rise/Fall Time
2.2
25
ns
400
mV
10Base-T Receive
VSQ
April 2007
Squelch Threshold
5MHz square wave
43
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Notes:
1. Exceeding the absolute maximum rating may damage the device. Stresses greater than the absolute maximum rating may 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.
2. The device is not guaranteed to function outside its operating rating.
3. TA = 25°C. Specification for packaged product only.
4. Current consumption is for the single 3.3V supply KSZ8041TL/FTL device only, and includes the 1.8V supply voltage (VDD_1.8, VDDA_1.8, V1.8_OUT) that is
provided by the KSZ8041TL/FTL. The PHY port’s transformer consumes an additional 45mA @ 3.3V for 100Base-TX and 70mA @ 3.3V for
10Base-T.
April 2007
44
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Timing Diagrams
MII SQE Timing (10Base-T)
tWL
TXC
tWH
tP
TXEN
COL
tSQE
tSQEP
Figure 11. MII SQE Timing (10Base-T)
Timing Parameter
Description
tP
TXC period
Min
Typ
400
Max
Unit
ns
tWL
TXC pulse width low
200
ns
tWH
TXC pulse width high
200
ns
tSQE
COL (SQE) delay after TXEN de-asserted
2.5
µs
tSQEP
COL (SQE) pulse duration
1.0
µs
Table 14. MII SQE Timing (10Base-T) Parameters
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
MII Transmit Timing (10Base-T)
tP
tWL
TXC
TXEN
tWH
tHD2
tSU2
TXD[3:0]
CRS
tSU1
tHD1
tCRS1
tCRS2
Figure 12. MII Transmit Timing (10Base-T)
Timing Parameter
Description
tP
TXC period
Min
Typ
400
Max
Unit
ns
tWL
TXC pulse width low
200
ns
tWH
TXC pulse width high
200
ns
tSU1
TXD[3:0] setup to rising edge of TXC
10
ns
tSU2
TXEN setup to rising edge of TXC
10
ns
tHD1
TXD[3:0] hold from rising edge of TXC
0
ns
tHD2
TXEN hold from rising edge of TXC
0
tCRS1
TXEN high to CRS asserted latency
4
Bit
Time
tCRS2
TXEN low to CRS de-asserted latency
8
Bit
Time
ns
Table 15. MII Transmit Timing (10Base-T) Parameters
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
MII Receive Timing (10Base-T)
Figure 13. MII Receive Timing (10Base-T)
Timing Parameter
Description
tP
RXC period
Min
400
ns
tWL
RXC pulse width low
200
ns
tWH
RXC pulse width high
tOD
(RXD[3:0], RXER, RXDV) output
delay from rising edge of RXC
tRLAT
CRS to (RXD[3:0], RXER, RXDV)
latency
Typ
Max
200
182
ns
225
6.5
Unit
ns
µs
Table 16. MII Receive Timing (10Base-T) Parameters
April 2007
47
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
MII Transmit Timing (100Base-TX)
Figure 14. MII Transmit Timing (100Base-TX)
Timing Parameter
Description
tP
TXC period
Min
Typ
40
Max
Unit
ns
tWL
TXC pulse width low
20
ns
tWH
TXC pulse width high
20
ns
tSU1
TXD[3:0] setup to rising edge of TXC
10
ns
tSU2
TXEN setup to rising edge of TXC
10
ns
tHD1
TXD[3:0] hold from rising edge of TXC
0
ns
tHD2
TXEN hold from rising edge of TXC
0
tCRS1
TXEN high to CRS asserted latency
4
Bit
Time
tCRS2
TXEN low to CRS de-asserted latency
4
Bit
Time
ns
Table 17. MII Transmit Timing (100Base-TX) Parameters
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
MII Receive Timing (100Base-TX)
Figure 15. MII Receive Timing (100Base-TX)
Timing Parameter
Description
Min
Typ
Max
tP
RXC period
tWL
RXC pulse width low
20
ns
tWH
RXC pulse width high
20
ns
tOD
(RXD[3:0], RXER, RXDV) output
delay from rising edge of RXC
19
tRLAT
CRS to (RXD[3:0], RXER, RXDV)
latency
1
40
2
Unit
ns
25
ns
3
Bit
Time
Table 18. MII Receive Timing (100Base-TX) Parameters
April 2007
49
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
RMII Timing
tcyc
T ra n s m it
T im in g
REFCLK
t1
t2
TX_EN
T X D [1 :0 ]
Figure 16. RMII Timing – Data Received from RMII
Receive
Tim ing
tcyc
REFCLK
CRSDV
RXD[1:0]
tod
Figure 17. RMII Timing – Data Input to RMII
Timing Parameter
Description
tcyc
Clock cycle
t1
Setup time
t2
Hold time
tod
Output delay
Min
Typ
Max
20
ns
4
ns
2
2.8
Unit
ns
10
ns
Table 19. RMII Timing Parameters
April 2007
50
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Auto-Negotiation Timing
A u to -N eg o tiatio n
F ast L in k P u ls e (F L P ) T im in g
FLP
B u rst
FLP
B u rst
T X + /T X -
t F LP W
tB T B
T X + /T X -
C lo c k
P u ls e
D a ta
P u ls e
tP W
tP W
D a ta
P u lse
C lo ck
P u ls e
tC T D
tC T C
Figure 18. Auto-Negotiation Fast Link Pulse (FLP) Timing
Timing Parameter
Description
Min
Typ
Max
8
16
24
Units
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 Pulse per
FLP Burst
17
ms
2
ms
100
ns
33
Table 20. Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters
April 2007
51
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
MDC/MDIO Timing
tP
MDC
tMD1
tMD2
MDIO
(PHY input)
Valid
Data
Valid
Data
tMD3
MDIO
(PHY output)
Valid
Data
Figure 19. MDC/MDIO Timing
Timing Parameter
Description
tP
MDC period
Min
t1MD1
MDIO (PHY input) setup to rising edge of MDC
10
tMD2
MDIO (PHY input) hold from rising edge of MDC
10
tMD3
MDIO (PHY output) delay from rising edge of MDC
Typ
400
Max
Unit
ns
ns
ns
222
ns
Table 21. MDC/MDIO Timing Parameters
April 2007
52
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Reset Timing
The KSZ8041TL/FTL reset timing requirement is summarized in the following figure and table.
Supply
Voltage
tsr
RST#
tcs
tch
Strap-In
Value
trc
Strap-In /
Output Pin
Figure 20. Reset Timing
Parameter
Description
Min
Max
Units
tsr
Stable supply voltage to reset high
10
ms
tcs
Configuration setup time
5
ns
tch
Configuration hold time
5
ns
trc
Reset to strap-in pin output
6
ns
Table 22. Reset Timing Parameters
After the de-assertion of reset, it is recommended to wait a minimum of 100µs before starting programming on the MIIM
(MDC/MDIO) Interface.
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Reset Circuit
The following reset circuit is recommended for powering up the KSZ8041TL/FTL if reset is triggered by the power supply.
3.3V
D1: 1N4148
D1
KSZ8041TL/FTL
R 10K
RST#
C 10uF
Figure 21. Recommended Reset Circuit
The following reset circuit is recommended for applications where reset is driven by another device (e.g., CPU or FPGA).
At power-on-reset, R, C and D1 provide the necessary ramp rise time to reset the KSZ8041TL/FTL device. The
RST_OUT_n from CPU/FPGA provides the warm reset after power up.
3.3V
KSZ8041TL/FTL
R 10K
D1
CPU/FPGA
RST#
RST_OUT_n
D2
C 10uF
D1, D2: 1N4148
Figure 22. Recommended Reset Circuit for Interfacing with CPU/FPGA Reset Output
April 2007
54
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
The following figure shows the reference circuits for pull-up, float and pull-down on the LED1 and LED0 strapping pins.
3.3V
Pull-up
KSZ8041TL/FTL
LED pin
3.3V
Float
KSZ8041TL/FTL
LED pin
3.3V
Pull-down
KSZ8041TL/FTL
LED pin
Figure 23. Reference Circuits for LED Strapping Pins
April 2007
55
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Selection of Isolation Transformer
A 1:1 isolation transformer is required at the line interface. An isolation transformer with integrated common-mode chokes
is recommended for exceeding FCC requirements.
The following table gives recommended transformer characteristics.
Parameter
Value
Turns ratio
1 CT : 1 CT
Test Condition
Open-circuit inductance (min.)
350µH
100mV, 100kHz, 8mA
Leakage inductance (max.)
0.4µH
1MHz (min.)
Inter-winding capacitance (max.)
12pF
D.C. resistance (max.)
0.9Ω
Insertion loss (max.)
1.0dB
HIPOT (min.)
1500Vrms
0MHz – 65MHz
Table 23. Transformer Selection Criteria
Magnetic Manufacturer
Part Number
Auto MDI-X
Number of Port
Bel Fuse
S558-5999-U7
Yes
1
Bel Fuse (Mag Jack)
SI-46001
Yes
1
Bel Fuse (Mag Jack)
SI-50170
Yes
1
Delta
LF8505
Yes
1
LanKom
LF-H41S
Yes
1
Pulse
H1102
Yes
1
Pulse (low cost)
H1260
Yes
1
Transpower
HB726
Yes
1
TDK (Mag Jack)
TLA-6T718
Yes
1
Table 24. Qualified Single Port Magnetics
Selection of Reference Crystal
Characteristics
Value
Units
Frequency
25
MHz
Frequency tolerance (max)
±50
ppm
Load capacitance (max)
20
pF
Series resistance
40
Ω
Table 25. Typical Reference Crystal Characteristics
April 2007
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M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
Package Information
N O T ES :
1 . D I M E N S I O N D O E S N O T I N C L U D E M O L D F L A S H O R P R O T RU S I O N S ,
E I T H E R O F W H I C H S H A L L N O T EX C EE D 0 . 2 5 4 M M .
2 . L E A D D I M E N S I O N D O E S N O T I N C LU D E D A M B A R P R O T R U S I O N .
3 . P A C K A G E T O P M O L D D I M E N S I O N S A R E S M A LL E R T H A N B O T T O M
4 . M O L D D IM E N S I O N S A N D T OP O F P A C KA G E W IL L N O T O V E R H A N G
B O T T O M OF PA C K A G E .
48-Pin (7mm x 7mm) TQFP Package
Note:
April 2007
ALL DIMENSIONS ARE IN MILLIMETERS.
57
M9999-042707-1.1
Micrel, Inc.
KSZ8041TL/FTL
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
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
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 into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user.
A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to
fully indemnify Micrel for any damages resulting from such use or sale.
© 2007 Micrel, Incorporated.
April 2007
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M9999-042707-1.1