KS8721B A4 Micrel Inc, KS8721B A4 Datasheet - Page 7

• Manufacturer Part Number: KS8721B A4
• Manufacturer: Micrel Inc

Specifications of KS8721B A4

• Lead Free Status / RoHS Status: Not Compliant

Note 1.
March 2006
Pin Number
Pin Number
Pin Number
25
25
25
25
25
22
22
22
22
22
23
23
23
23
23
26
26
26
26
26
27
27
27
27
27
28
28
28
28
28
29
29
29
29
29
30
30
30
30
30
31
31
31
31
31
32
32
32
32
32
33
33
33
33
33
34
34
34
34
34
35
35
35
35
35
36
36
36
36
36
Pwr = power supply
GND = ground
I = input
O = output
I/O = bi-directional
Ipu = input w/ internal pull-up
Ipd = input w/ internal pull-down
Ipd/O = input w/ internal pull-down during reset, output pin otherwise
Ipu/O = input w/ internal pull-up during reset, output pin otherwise
PU = strap pin pull-up
PD = strap pin pull-down
NC = No connect
FXSD/FXEN
FXSD/FXEN
FXSD/FXEN
FXSD/FXEN
FXSD/FXEN
LED0/TEST
LED0/TEST
LED0/TEST
LED0/TEST
LED0/TEST
Pin Name
Pin Name
Pin Name
RMII_BTB
RMII_BTB
RMII_BTB
RMII_BTB
RMII_BTB
NWAYEN
NWAYEN
NWAYEN
NWAYEN
NWAYEN
SPD100/
SPD100/
SPD100/
SPD100/
SPD100/
PHYAD0
PHYAD0
PHYAD0
PHYAD0
PHYAD0
DUPLEX
DUPLEX
DUPLEX
DUPLEX
DUPLEX
VDDRX
VDDRX
VDDRX
VDDRX
VDDRX
noFEF
noFEF
noFEF
noFEF
LED1/
LED1/
LED1/
LED1/
LED1/
LED2/
LED2/
LED2/
LED2/
LED2/
LED3/
LED3/
LED3/
LED3/
LED3/
INT#/
INT#/
INT#/
INT#/
INT#/
CRS/
CRS/
CRS/
CRS/
CRS/
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
PD#
PD#
PD#
PD#
PD#
RX+
RX+
RX+
RX+
RX+
RX-
RX-
RX-
RX-
RX-
Type
Type
Type
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipd/O
Ipd/O
Ipd/O
Ipd/O
Ipd/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipd/O
Ipd/O
Ipd/O
Ipd/O
Ipd/O
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
Pwr
Pwr
Pwr
Pwr
Pwr
Ipu
Ipu
Ipu
Ipu
Ipu
(Note 1)
I
I
I
I
I
I
I
I
I
I
Pin Function
Pin Function
Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up
Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up
Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up
Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up
Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up
/reset. See “Strapping Options” section for details.
/reset. See
/reset. See
/reset. See
/reset. See
MII Carrier Sense Output: The pull-up/pull-down value is latched as RMII BTB
MII Carrier Sense Output: The pull-up/pull-down value is latched as RMII BTB
MII Carrier Sense Output: The pull-up/pull-down value is latched as RMII BTB
MII Carrier Sense Output: The pull-up/pull-down value is latched as RMII BTB
MII Carrier Sense Output: The pull-up/pull-down value is latched as RMII BTB
during reset when RMII mode is selected. See “Strapping Options” section
during reset when RMII mode is selected. See
during reset when RMII mode is selected. See
during reset when RMII mode is selected. See
during reset when RMII mode is selected. See
for details.
for details.
for details.
for details.
for details.
Ground.
Ground.
Ground.
Ground.
Ground.
Link/Activity LED Output:
Link/Activity LED Output:
Link/Activity LED Output:
Link/Activity LED Output:
Link/Activity LED Output:
Lnk/Act
Lnk/Act
Lnk/Act
Lnk/Act
Lnk/Act
Lnk/Act
Lnk/Act
No Link
No Link
No Link
No Link
No Link
No Link
No Link
Link
Link
Link
Link
Link
Link
Link
Act
Act
Act
Act
Act
Act
Act
The external pull-down enable test mode and only used for the factory test.
The external pull-down enable test mode and only used for the factory test.
The external pull-down enable test mode and only used for the factory test.
The external pull-down enable test mode and only used for the factory test.
The external pull-down enable test mode and only used for the factory test.
Speed LED Output: Latched as SPEED (Register 0, bit 13) during power-up/reset.
Speed LED Output: Latched as SPEED (Register 0, bit 13) during power-up/reset.
Speed LED Output: Latched as SPEED (Register 0, bit 13) during power-up/reset.
Speed LED Output: Latched as SPEED (Register 0, bit 13) during power-up/reset.
Speed LED Output: Latched as SPEED (Register 0, bit 13) during power-up/reset.
See “Strapping Options” section for details.
See
See
See
See
Speed
Speed
Speed
Speed
Speed
Speed
Speed
10BT
10BT
10BT
10BT
10BT
10BT
10BT
100BT
100BT
100BT
100BT
100BT
100BT
100BT
Full-duplex LED Output: Latched as DUPLEX (register 0h, bit 8) during power-up/
Full-duplex LED Output: Latched as DUPLEX (register 0h, bit 8) during power-up/
Full-duplex LED Output: Latched as DUPLEX (register 0h, bit 8) during power-up/
Full-duplex LED Output: Latched as DUPLEX (register 0h, bit 8) during power-up/
Full-duplex LED Output: Latched as DUPLEX (register 0h, bit 8) during power-up/
reset. See “Strapping Options” section for details.
reset. See
reset. See
reset. See
reset. See
Duplex
Duplex
Duplex
Half
Half
Half
Half
Half
Half
Half
Full
Full
Full
Full
Full
Full
Full
Collision LED Output: Latched as ANEG_EN (register 0h, bit 12) during power-up/
Collision LED Output: Latched as ANEG_EN (register 0h, bit 12) during power-up/
Collision LED Output: Latched as ANEG_EN (register 0h, bit 12) during power-up/
Collision LED Output: Latched as ANEG_EN (register 0h, bit 12) during power-up/
Collision LED Output: Latched as ANEG_EN (register 0h, bit 12) during power-up/
reset. See “Strapping Options” section for details.
reset. See
reset. See
reset. See
reset. See
Collison
Collison
Collison
No Collision
No Collision
No Collision
No Collision
No Collision
No Collision
No Collision
Collision
Collision
Collision
Collision
Collision
Collision
Collision
Power Down. 1 = Normal operation, 0=Power down, Active low.
Power Down. 1 = Normal operation, 0=Power down, Active low.
Power Down. 1 = Normal operation, 0=Power down, Active low.
Power Down. 1 = Normal operation, 0=Power down, Active low.
Power Down. 1 = Normal operation, 0=Power down, Active low.
Analog 2.5V power supply.
Analog 2.5V power supply.
Analog 2.5V power supply.
Analog 2.5V power supply.
Analog 2.5V power supply.
Receive Input: Differential receive input pins for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pins for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pins for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pins for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pins for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pin for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pin for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pin for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pin for FX, 100BaseTX or 10BaseT.
Receive Input: Differential receive input pin for FX, 100BaseTX or 10BaseT.
Fiber Mode Enable / Signal Detect in Fiber Mode. If FXEN = 0, FX mode is
Fiber Mode Enable / Signal Detect in Fiber Mode. If FXEN = 0, FX mode is
Fiber Mode Enable / Signal Detect in Fiber Mode. If FXEN = 0, FX mode is
Fiber Mode Enable / Signal Detect in Fiber Mode. If FXEN = 0, FX mode is
Fiber Mode Enable / Signal Detect in Fiber Mode. If FXEN = 0, FX mode is
disable. The default is “0”. See “100BT FX Mode” section for more details.
disable. The default is “0”. See
disable. The default is “0”. See
disable. The default is “0”. See
disable. The default is “0”. See
Ground.
Ground.
Ground.
Ground.
Ground.
Ground.
Ground.
Ground.
Ground.
Ground.
“Strapping Options” section for details.
“Strapping Options”
“Strapping Options” section for details.
“Strapping Options”
“Strapping Options” section for details.
“Strapping Options”
“Strapping Options” section for details.
“Strapping Options”
Pin State
Pin State
Pin State
Pin State
Pin State
Pin State
Pin State
H
H
H
H
H
H
H
L
L
L
L
L
L
L
—
—
—
—
—
—
—
Pin State
Pin State
Pin State
Pin State
Pin State
Pin State
Pin State
H
H
H
H
H
H
H
L
L
L
L
L
L
L
Pin State
Pin State
Pin State
H
H
H
H
H
H
H
L
L
L
L
L
L
L
Pin State
Pin State
Pin State
H
H
H
H
H
H
H
L
L
L
L
L
L
L
7
“100BT FX Mode” section for more details.
“100BT FX Mode”
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
“off”
“off”
“off”
“off”
“off”
“off”
“off”
“on”
“on”
“on”
“on”
“on”
“on”
“on”
“Toggle”
“Toggle”
“Toggle”
“Toggle”
“Toggle”
“Toggle”
“Toggle”
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
LED Defi nition
“off”
“off”
“off”
“off”
“off”
“off”
“off”
“on”
“on”
“on”
“on”
“on”
“on”
“on”
LED Defi nition
LED Defi nition
LED Defi nition
“off”
“off”
“off”
“off”
“off”
“off”
“off”
“on”
“on”
“on”
“on”
“on”
“on”
“on”
LED Defi nition
LED Defi nition
LED Defi nition
“off”
“off”
“off”
“off”
“off”
“off”
“off”
“on”
“on”
“on”
“on”
“on”
“on”
“on”
“Strapping Options” section
“Strapping Options”
M9999-030106