KSZ8842-PMBLAM MICREL [Micrel Semiconductor], KSZ8842-PMBLAM Datasheet - Page 55
![no-image](/images/no-image-200.jpg)
KSZ8842-PMBLAM
Manufacturer Part Number
KSZ8842-PMBLAM
Description
2-Port Ethernet Switch with PCI Interface
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
1.KSZ8842-PMBLAM.pdf
(119 pages)
- Current page: 55 of 119
- Download datasheet (961Kb)
Micrel, Inc.
Switch Global Control Register 3 (Offset 0x0406): SGCR3
This register contains the global control for the switch function.
October 2007
Rate: 148,800 frames/sec * 67 ms/interval * 1% = 99 frames/interval (approx.) = 0x63
15 – 8
2 – 0
Bit
Bit
3
2
1
0
7
6
5
4
3
Default
Default
0x63
000
0
0
0
1
0
0
0
0
0
R/W
R/W
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Description
No excessive collision drop
1 = the switch will not drop packets when 16 or more collisions occur.
0 = the switch will drop packets when 16 or more collisions occur.
Huge packet support
1 = will accept packet sizes up to 1916 bytes (inclusive). This bit setting
will override setting from bit 1 of the same register.
0 = the max packet size will be determined by bit 1 of this register.
Legal Maximum Packet size check enable
0 = will accept packet sizes up to 1536 bytes (inclusive).
1 = 1522 bytes for tagged packets, 1518 bytes for untagged packets. Any
packets larger than the specified value will be dropped.
Priority Buffer reserve
1 = each ports pre-allocated 48 buffers, used exclusively for high priority
packets(q3,q2,q1). Effective only when multiple queues feature is turned
on.
0 = each ports pre-allocated 48 buffers, used for all priority packets
(q3,q2,q1,q0).
Description
Broadcast storm protection rate
Bit [7:0]
These bits, along with SGCR3[2:0], determines how many “64-byte
blocks” of packet data are allowed on an input port in a preset period. The
period is 67ms for 100Base-T or 670ms for 10Base-T. The default is 1%.
Repeater mode
1 = enable repeater mode
0 = normal mode
Note: The Repeater only supports 100Base-T, halfduplex modes. When
set to repeater mode, need to disable follow control in register MDTXC[9]
Switch host port duplex mode
1 = enable switch host interface half duplex mode.
0 = enable switch host interface full duplex mode. (Keep default value to
match DMA MAC to the full duplex mode only).
Switch host port flow control enable
1 = enable full duplex flow control on Switch host interface.
0 = disable full duplex flow control on Switch host interface.
Reserved (must be 0)
Null VID replacement
1 = replaces NULL VID with port VID(12 bits)
0 = no replacement for NULL VID
Broadcast storm protection rate
Bit [10:8]
These bits, along with SGCR3[15-8], determines how many “64-byte
blocks” of packet data allowed on an input port in a preset period. The
period is 67ms for 100Base-T or 670ms for 10Base-T. The default is 1%.
55
KSZ8842-PMQL/PMBL
M9999-100207-1.5
Related parts for KSZ8842-PMBLAM
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![KSZ8842](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![KSZ8842-16MBL-EVAL](/images/no-image3.png)
Part Number:
Description:
2-Port Ethernet Switch with Non-PCI Interface
Manufacturer:
MICREL [Micrel Semiconductor]
Datasheet:
![KSZ8842-16](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
2-port Ethernet Switch with PCI Interface
Manufacturer:
Micrel Semiconductor
Datasheet:
![MIC5219YM5](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![MIC50395CN](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Six Decade Counter / Display Decoder
Manufacturer:
Micrel Semiconductor
Datasheet:
![MIC2524-2BN](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![MIC5015BN](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![LM2574BWM](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![MIC4574BWM](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
200kHz Simple 0.5A Buck Voltage Regulator
Manufacturer:
Micrel Semiconductor
Datasheet:
![SY100EL32VZITR](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![SY100EL92ZGTR](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![SY100ELT23ZCTR](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![MIC4685](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet:
![MIC5255-3.0BM5](/images/manufacturer_photos/0/4/435/micrel_semiconductor_tmb.jpg)
Part Number:
Description:
Manufacturer:
Micrel Semiconductor
Datasheet: