KS8842-32MQL Micrel Inc, KS8842-32MQL Datasheet - Page 76

• Manufacturer Part Number: KS8842-32MQL
• Description: IC SWITCH 10/100 32BIT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8842-32MQL

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• 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
• Package Type: PQFP
• 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: KS8842-PMQL-EVAL - EVAL KIT EXPERIMENTAL KS8842KS8842-16MQL-EVAL - EVAL KIT EXPERIMENTAL KS8842
• Lead Free Status / RoHS Status: Not Compliant, Lead free / RoHS Compliant
• Other names: 576-1459

Bank 32 Switch Global Control Register 3 (0x06): SGCR3
This register contains the global control for the switch function.
Rate: 148,800 frames/sec * 67 ms/interval * 1% = 99 frames/interval (approx.) = 0x63.
Note 1: User has to set bit 13 (100Mbps), bit 12 (auto-negotiation disabled) and bit 8 (half duplex) in both P1MBCR and
P2MBCR registers for repeater mode.
Bank 32 Switch Global Control Register 4 (0x08): SGCR4
This register contains the global control for the switch function.
Micrel, Inc.
Bit
15-8
7
6
5
4
3
2-0
Bit
15-0
October 2007
Default
0
0
0
0
0
Default
0x63
0x0
0x2400
R/W
RW
RW
RW
RW
RW
RW
RW
R/W
RW
Description
Broadcast Storm Protection Rate Bit [7:0]
These bits, along with SGCR3[2:0], determine how many 64-byte blocks of packet
data are allowed on an input port in a preset period. The period is 67ms for 100BT or
670ms for 10BT. The default is 1%.
Repeater Mode (Note 1)
1 = enable repeater mode.
0 = normal mode.
The switch supports only half duplex , 100BT in repeater mode.
Switch Host Half-Duplex Mode
The KSZ8842M supports only half-duplex 100-BaseT throughput in repeater mode.
1 = enable host port interface half-duplex mode, this bit must be set for repeater mode
0 = enable host port interface full-duplex mode..
Switch Flow Control Enable
1 = enable full-duplex flow control on Switch Host port.
0 = disable full-duplex flow control on Switch Host port
Reserved
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] determine how many 64-byte blocks of packet
data are allowed on an input port in a preset period. The period is 67ms for 100BT or
670ms for 10BT. The default is 1%.
Description
Reserved
76
KSZ8842-16/32 MQL/MVL/MVLI/MBL
M9999-102207-1.9