KSZ8041RNL Micrel Inc, KSZ8041RNL Datasheet - Page 14

• Manufacturer Part Number: KSZ8041RNL
• Description: TXRX 10/100 3.3V PHY RMII 32-MLF
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of KSZ8041RNL

• Number Of Drivers/receivers: 1/1
• Protocol: RMII
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 32-MLF®, QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3503

Micrel, Inc.
Strapping Options – KSZ8041NL
Note:
1.
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 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 mode, or is not configured with an incorrect PHY Address.
September 2010
15
14
13
18
29
28
20
31
16
30
Pin Number
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 Name
PHYAD2
PHYAD1
PHYAD0
CONFIG2
CONFIG1
CONFIG0
ISO
SPEED
DUPLEX
NWAYEN
Ipd/O
Ipd/O
Ipu/O
Ipd/O
Ipd/O
Ipd/O
Ipd/O
Ipu/O
Ipu/O
Ipu/O
Type
(1)
Pin Function
The PHY Address is latched at power-up / reset and is configurable to any value from
1 to 7.
The default PHY Address is 00001.
PHY Address bits [4:3] are always set to ‘00’.
The CONFIG[2:0] strap-in pins are latched at power-up / reset and are defined as
follows:
ISOLATE mode
During power-up / reset, this pin value is latched into register 0h bit 10.
SPEED mode
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.
DUPLEX mode
During power-up / reset, this pin value is latched into register 0h bit 8 as the Duplex
Mode.
Nway Auto-Negotiation Enable
During power-up / reset, this pin value is latched into register 0h bit 12.
CONFIG[2:0]
000
001
010
011
100
101
110
111
Pull-up = Enable
Pull-down (default) = Disable
Pull-up (default) = 100Mbps
Pull-down = 10Mbps
Pull-up (default) = Half Duplex
Pull-down = Full Duplex
Pull-up (default) = Enable Auto-Negotiation
Pull-down = Disable Auto-Negotiation
Mode
MII (default)
RMII
Reserved – not used
Reserved – not used
MII 100Mbps Preamble Restore
Reserved – not used
Reserved – not used
Reserved – not used
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M9999-090910-1.4
KSZ8041NL/RNL