KSZ8842-32MVL Micrel Inc, KSZ8842-32MVL Datasheet - Page 74
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KSZ8842-32MVL
Manufacturer Part Number
KSZ8842-32MVL
Description
2-Port Ethernet Switch/Repeater + Generic (32-bit) Bus Interface( )
Manufacturer
Micrel Inc
Specifications of KSZ8842-32MVL
Controller Type
Ethernet Switch Controller
Interface
PCI
Voltage - Supply
3.1 V ~ 3.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
128-LQFP
Number Of Primary Switch Ports
2
Internal Memory Buffer Size
32
Operating Supply Voltage (typ)
3.3V
Fiber Support
Yes
Integrated Led Drivers
Yes
Phy/transceiver Interface
MII
Power Supply Type
Analog/Digital
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.5V
Operating Supply Voltage (min)
3.1V
Operating Temperature Classification
Commercial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
576-1635 - BOARD EVALUATION KSZ8842-16MVL
Current - Supply
-
Lead Free Status / RoHS Status
Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
KSZ8842-32MVLI
Manufacturer:
Micrel
Quantity:
915
Bank 32 Switch Global Control Register 2 (0x04): SGCR2
This register contains the global control for the switch function.
Micrel, Inc.
Bit
10
9
8
7-4
3
2-1
0
Bit
15
14
13
12
11
10-9
8
October 2007
Default
1
0
0
-
0x0
-
0
Default
0
0
0
0
0
0
0x0
R/W
RW
RW
RW
RW
RW
RW
RW
R/W
RW
RW
RW
RW
RW
RW
RW
Description
Aging Enable
1 = enable age function in the chip.
0 = disable age function in the chip.
Fast Age Enable
1 = turn on fast age (800us).
Aggressive Back-Off Enable
1 = enable more aggressive back off algorithm in half-duplex mode to enhance
performance. This is not an IEEE standard.
Reserved
Pass Flow Control Packet
1 = switch will not filter 802.1x “flow control” packets.
Reserved
Link Change Age
1 = link change from “link” to “no link” will cause fast aging (<800us) to age address
table faster. After an age cycle is complete, the age logic will return to normal (300 +
75 seconds).
Note: If any port is unplugged, all addresses will be automatically aged out.
Description
802.1Q VLAN Enable
1 = 802.1Q VLAN mode is turned on. VLAN table must be set up before the operation.
0 = 802.1Q VLAN is disabled.
IGMP Snoop Enable On Switch Host port
1 = IGMP snoop is enabled.
All the IGMP packets are forwarded to the Switch host port.
0 = IGMP snoop is disabled.
Ipv6 MLD Snooping Enable
1 = enable IPv6 MLD snooping
Ipv6 MLD Snooping Option
1 = enable IPv6 MLD snooping option
Priority Scheme Select
0 = always TX higher priority packets first.
1 = Weighted Fair Queueing enabled. When all four queues have packets waiting to
transmit, the bandwidth allocation is q3:q2:q1:a0 = 8:4:2:1.
If any queues are empty, the highest non-empty queue gets one more weighting. For
example, if q2 is empty, q3:q1:q0 becomes (8+1): 0:2:1.
Reserved
Sniff Mode Select
1 =performs RX and TX sniff (both the source port and destination port need to
match).
0 = performs RX or TX sniff (either the source port or destination port needs to match).
This is the mode used to implement RX only sniff.
74
KSZ8842-16/32 MQL/MVL/MVLI/MBL
M9999-102207-1.9