KSZ8851-16MLL Micrel Inc, KSZ8851-16MLL Datasheet - Page 60

• Manufacturer Part Number: KSZ8851-16MLL
• Description: Single Ethernet Port + Generic (16-bit) Bus Interface( )
• Manufacturer: Micrel Inc

Specifications of KSZ8851-16MLL

• Controller Type: Ethernet Controller, MAC/PHY
• Interface: Bus
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-3292 - BOARD EVALUATION KSZ8851-16MLL
• Current - Supply: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-3252

August 2009
Micrel, Inc.
Bit
14
13
12
11-8
7
6
5-2
1-0
Default Value
0
0
0
0x0
0
0
0x0
0x0
R/W
RW
RW
RW
RW
RW
RW
RO
(W1C)
RW
Description
PME Delay Enable
This bit is used to enable the delay of PME output pin assertion.
When this bit is set to 1, the device will not assert the PME output till the device’s all clocks
are running and ready for host access.
When this bit is set to 0, the device will assert the PME output without delay.
This bit is only valid when Auto Wake-Up Enable (bit7) is set to 1 in this register.
Reserved
PME Output Polarity
This bit is used to control the PME output pin polarity.
When this bit is set to 1, the PME output pin is active high.
When this bit is set to 0, the PME output pin is active low.
Wake-on-LAN to PME Output Enable
These four bits are used to enable the PME output pin asserted when one of these wake-
on-LAN events is detected:
Bit 11: is corresponding to receive wake-up frame.
Bit 10: is corresponding to receive magic packet.
Bit 9: is corresponding to link change from down to up.
Bit 8: is corresponding to signal energy detected.
When the bit is set to 1, the PME pin will be asserted when a corresponding wake-on-LAN
event is occurred.
When this bit is set to 0, the PME pin will be not asserted when a corresponding wake-on-
LAN event is occurred.
Auto Wake-Up Enable
This bit is used to enable automatically wake-up from low power state to normal power
state in energy detect mode if carrier (signal energy) is present more than wake-up time in
GSWUTR register. During the normal power state, the device can receive and transmit
packets.
When this bit is set to 1, the auto wake-up is enabled in energy detect mode.
When this bit is set to 0, the auto wake-up is disabled in energy detect mode.
Wake-Up to Normal Operation Mode
This bit is used to control the device wake-up from low power state in energy detect mode
to normal operation mode if signal energy is detected longer than the programmed wake-
up time in GSWUTR register.
When this bit is set to 1, the device will automatically go to the normal operation mode from
energy detect mode.
When this bit is set to 0, the device will not automatically go to the normal mode from
energy detect mode.
This bit is only valid when Auto Wake-Up Enable (bit7) is set to 1.
Wake-Up Event Indication
These four bits are used to indicate the KSZ8851-16MLL wake-up event status as below:
0000: No wake-up event.
0001: Wake-up from energy event detected. (Bit 2 also set to 1 in ISR register)
0010: Wake-up from link up event detected. (Bit 3 also set to 1 in ISR register)
0100: Wake-up from magic packet event detected.
1000: Wake-up from wakeup frame event detected.
If Wake-on-LAN to PME Output Enable bit[11:8] are set, the KSZ8851-16MLL also asserts
the PME pin. These bits are cleared on power up reset or by write 1. It is not modified by
either hardware or software reset. When these bits are cleared, the KSZ8851-16MLL
deasserts the PME pin.
Power Management Mode
These two bits are used to control the KSZ8851-16MLL power management mode as
below:
00: Normal Operation Mode.
01: Energy Detect Mode. (two states in this mode either low power or normal power)
60
KSZ8851-16MLL/MLLI
M9999-083109-2.0