TXC_P1
RXD1_P1
RXD0_P1
RXC_P1
MDIO
RXD3_U1
RXD1_U1
RXD2_U1
RXC_U1
TXER_U1
TXD2_U1
TXD3_U1
MII_TXC
MII_MDC
MII_RXC
RXER_U1
MII_MDIO
MII_RXD2
MII_RXD3
COL
MII_RXDV
MII_RXD1
MII_RXD0
CRS_U1
MII_TXD2
MII_TXD3
MII_TXD0
MII_TXD1
MII_TXEN
INTRP_U1
RXP_U1
RXM_U1
TXP_U1
TXM_U1
TXER_U1
TXD0_U1
RXD2_P1
RXDV_P1
RXER_P1
RXD3_P1
TXEN_U1
INTRP_U1
TXD1_U1
CRS_U1
XI_D1XO_D1
XI_U1
XO_U1
COL
MII_TXEN
TXC_U1
RXC_U1
RXD0_U1
RXD1_U1
RXD2_U1
RXD3_U1
RXDV_U1
RXER_U1
MII_RXD2
CRS_U1
RXDV_U1
RXER_U1
RXD0_U1
SIGD
XO_U1
XI_PLXO_PL
MII_RXC
MII_RXD0
MII_RXD1
MII_RXDV
MII_RXD3
MII_TXC
MII_TXEN
MII_TXD0
MII_TXD1
MII_TXD2
MII_TXD3
XI_U1
RESET_IN
RST#_U1
SIGD_P1
SIGD
RESET_IN
SIGDINTRP_U1
MDIO_H10
MDC_H10
MDIO_H10
MII_TXC
MII_RXC
MII_RXD2
MII_RXD3
MII_RXDV
MII_RXD1
MII_RXD0
MII_TXD2
MII_TXD3
MII_TXD0
MII_TXD1
MII_TXEN
RXER_U1
RESET_IN
MDC
MDC
MDIO MDIO_H10
MDC_H10
MDC
MDIO MII_MDIO
MII_MDC
TXER_U1
TXD3_U1
TXD2_U1
TXD1_U1
TXD0_U1
TXEN_U1
TXC_U1
RXC_U1
RXDV_U1
RXD0_U1
RXD1_U1
RXD2_U1
RXD3_U1
VDDIO
AVDDL
AVDDH
VDDIO
DVDDL
DVDDL
AVDDH
VDDIO
VDDIO
VDDIO
AVDDL
5V_HDR
5.0V
VDDIO
VDDIO
3.3V
3.3V
3.3V
RXP_U1(4)
RXM_U1(4)
TXP_U1(4)
TXM_U1(4)
SIGD (6)
CLK_U2 (5)
MDC (5)
MDIO (5)
PHY_TXD3 (5)
PHY_TXD2 (5)
PHY_TXD1 (5)
PHY_TXD0 (5)
PHY_TXEN (5)
PHY_TXC (5)
PHY_RXD1 (5)
PHY_RXD2 (5)
PHY_RXD3 (5)
PHY_RXDV (5)
PHY_RXC (5)
PHY_RXD0 (5)
CONFIG2
PHYAD0
CONFIG1
CONFIG0
Q-WIRE_DISABLE
PHYAD2
Strapping Options (Refer to data sheet for descriptions)
PHYAD1
AUTO_NEG_DIS
010
MII normal mode; Auto-MDI/MDI-X disabled000
Mode (description)CONFIG[2:0]
MII normal mode; Auto-MDI/MDI-X enabled
NAND_Tree#
KSZ8061
Push
Button
Reset
(32-QFN)
Notes:
1. Place all MII bus resistors on the traces
to U1 to minimize stubs.
2. Place R11-R26 and R211-R226 on opposite
sides of the board - mirror image.
MII Back-to-Back mode is required
for MII loopback, and when connecting
KSZ8061 to KSZ8081.
MII normal mode is used when interfacing
via the MII Connector.
1) PL135-27 (default): Install R62. Remove R91, R92
or
2) Y1: Install R91, R92. Remove R62.
0.1uF at U1 pin 15
0.1uF at U1 pins 9, 30
0.1uF at U1 pin 3
0.1uF at U1 pin 8
Labels for 5x2 Header:
1
3
5
7
9
2
4
6
8
10
GND / BLACK
MDIO / GREEN
5V / RED
SIG_DET
RESET#
MDC / ORANGE
MDIO / YELLOW
5V / RED
INTERRUPT#
GND / BLACK
KSZ8061 Clock Options
RX_ER Flip Flop
Male MII Connector: Connect to switch or SOC/CPU board.
Put KSZ8061 in normal mode.
Unpower KSZ8081 (remove JP1).
Female MII Connector: Connect back-to-back with another PHY.
5V is supplied to the attached board.
Put KSZ8061 in Back-to-Back mode.
Unpower KSZ8081 (remove JP1).
SIG DET
1. KSZ8061 has a Paddle Ground on bottom side of chip.
Refer to datasheet for mechanical dimensions.
Notes:
CLEAR RX_ER FFLOP
GND
Place this GND test
point on bottom side;
Center and connect to
Paddle Ground of U1.
MII Bus Connection
KSZ8061 to KSZ8081
KSZ8061 to MII Connectors J4, J5
KSZ8061 MII loopback
R1 - R6
Remove
Remove
Install
R11 - R26
Optional
Install
Remove
R211 - R226
Install
Optional
Remove
110 MII Back-to-Back; Auto-MDI/MDI-X enabled
Configuration options for KSZ8061MNX
Y1
25MHz
Y1
25MHz
C31
0.1uF
C31
0.1uF
R33 33R33 33
D8
BAV16W-7 SOD-123
D8
BAV16W-7 SOD-123
21
R212 0R212 0
R77
10K
R77
10K
C10
15pF
C10
15pF
R213 0R213 0
R22 0R22 0
R7633 R7633
R53 optR53 opt
R5 Opt/0R5 Opt/0
R81 0R81 0
C11
22pF
C11
22pF
R83 33R83 33
R12 0R12 0
D6
BAV16W-7 SOD-123
D6
BAV16W-7 SOD-123
2 1
R214 0R214 0
R16 0R16 0
R78 4.7KR78 4.7K
R122 10KR122 10K
Y2
25MHz
Y2
25MHz
R226 0R226 0
C7
2.2uF
C7
2.2uF
R91 Opt/0R91 Opt/0
R62
0
R62
0
R60 0R60 0
R63 0R63 0
C65
0.1uF
C65
0.1uF
R86 33R86 33
R215 0R215 0
R35 1KR35 1K
D1
BAV16W-7 SOD-123
D1
BAV16W-7 SOD-123
2 1
C12
22pF
C12
22pF
R84 33R84 33
C8
0.1uF
C8
0.1uF
R216 0R216 0
R1 Opt/0R1 Opt/0
C73
0.1uF
C73
0.1uF
R2 Opt/0R2 Opt/0
R15 0R15 0
R11 0R11 0
R6 Opt/0R6 Opt/0
J4
Female MII Connector
J4
Female MII Connector
VCC
1
MDIO
2
MDC
3
RXD3
4
RXD2
5
RXD1
6
RXD0
7
RX_DV
8
RX_CLK
9
RX_ER
10
TX_ER
11
TX_CLK
12
TX_EN
13
TXD0
14
TXD1
15
TXD2
16
TXD3
17
COL
18
CRS
19
VCC
20
VCC
21
NC
22
NC
23
NC
24
NC
25
NC
26
NC
27
NC
28
NC
29
NC
30
NC
31
NC
32
NC
33
NC
34
NC
35
NC
36
NC
37
NC
38
NC
39
VCC
40
R123
220
R123
220
R26 0R26 0
C68
0.1uF
C68
0.1uF
R3 Opt/0R3 Opt/0
R221 0R221 0
R23 0R23 0
R21 0R21 0
R61
0
R61
0
R87 33R87 33
R92 Opt/0R92 Opt/0
TP5TP5
R222 0R222 0
R120
220
R120
220
R36 Opt/4.7KR36 Opt/4.7K
C76
0.1uF
C76
0.1uF
R85 33R85 33
R42 4.7KR42 4.7K
TP6TP6
R20 33R20 33
J7
Header 5x2
J7
Header 5x2
1
3
5
7
9
8
6
4
2
10
R24 0R24 0
R37 Opt/4.7KR37 Opt/4.7K
D10
LED - GREEN SMD
D10
LED - GREEN SMD
21
U1
KSZ8061MNX
U1
KSZ8061MNX
XI
1
XO
2
AVDDH
3
TXP
4
TXM
5
RXP
6
RXM
7
AVDDL
8
VDDL
9
MDIO
10
MDC
11
RXER
12
RXDV
13
RXD3
14
VDDIO
15
RXD2
16
RXD1
17
RXD0
18
RXC
19
TXC
20
TXEN
21
TXD0
22
TXD1
23
LED0/TXER
24
TXD2
25
TXD3
26
CRS
27
RESET#
28
INTRP
29
VDDL
30
REXT
31
SIGDET
32
PAD_GND
33
D9
BAV16W-7 SOD-123
D9
BAV16W-7 SOD-123
21
R14 0R14 0
R28 33R28 33
R82 33R82 33
R27 33R27 33
R44 Opt/4.7KR44 Opt/4.7K
R51 4.7kR51 4.7k
J5
Male MII Connector
J5
Male MII Connector
VCC
1
MDIO
2
MDC
3
RXD3
4
RXD2
5
RXD1
6
RXD0
7
RX_DV
8
RX_CLK
9
RX_ER
10
TX_ER
11
TX_CLK
12
TX_EN
13
TXD0
14
TXD1
15
TXD2
16
TXD3
17
COL
18
CRS
19
VCC
20
VCC
21
NC
22
NC
23
NC
24
NC
25
NC
26
NC
27
NC
28
NC
29
NC
30
NC
31
NC
32
NC
33
NC
34
NC
35
NC
36
NC
37
NC
38
NC
39
VCC
40
R223 0R223 0
D3
LED - GREEN SMD
D3
LED - GREEN SMD
21
U3
Micrel PL135-27
U3
Micrel PL135-27
XIN
1
CLK1
2
GND
3
CLK0
4
VDD
5
XOUT
6
S1
SW PUSHBUTTON
S1
SW PUSHBUTTON
1 2
3 4
R121 220R121 220
R224 0R224 0
R41 4.7KR41 4.7K
R88 33R88 33
R47
6.04K
R47
6.04K
S3
SW PUSHBUTTON
S3
SW PUSHBUTTON
1 2
3 4
R4 Opt/0R4 Opt/0
R43 Opt/1KR43 Opt/1K
C3
10uF
C3
10uF
R25 0R25 0 R225 0R225 0
D4
LED - RED SMD
D4
LED - RED SMD
2 1
R40 4.7KR40 4.7K
R90 33R90 33
C9
15pF
C9
15pF
R13 0R13 0
R31 33R31 33
R211 0R211 0
R39 Opt/4.7KR39 Opt/4.7K
U7
74LVC1G175
U7
74LVC1G175
CLK
1
GND
2
D
3
Q
4
VCC
5
CLR#
6
R38 Opt/4.7KR38 Opt/4.7K
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