KSZ8995XA B3 Micrel Inc, KSZ8995XA B3 Datasheet - Page 30

• Manufacturer Part Number: KSZ8995XA B3
• Manufacturer: Micrel Inc

Specifications of KSZ8995XA B3

• Number Of Primary Switch Ports: 5
• Internal Memory Buffer Size: 64
• Operating Supply Voltage (typ): 1.8/2.5/3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII/SNI
• 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 Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

September 2008
Register Map
Global Registers
Decimal
Address
Register 0 (0x00): Chip ID0
7-0
Register 1 (0x01): Chip ID1/Start Switch
7-4
3-1
0
Register 2 (0x02): Global Control 0
7
6-4
104-109
96-103
12-15
16-29
30-31
32-45
46-47
48-61
62-63
64-77
78-79
80-93
94-95
2-11
0-1
Offset
0x0C-0x0F
0x10-0x1D
0x1E-0x2F
0x20-0x2D
0x2E-0x2F
0x30-0x3D
0x3E-0x3F
0x40-0x4D
0x4E-0x4F
0x50-0x5D
0x5E-0x5F
0x68-0x6D
0x02-0x0B
0x00-0x01
0x60-0x67
Name
Family ID
Chip ID
Revision ID
Start switch
Reserved
802.1p base priority
Hex
Description
Chip ID Registers
Global Control Registers
Reserved
Port 1 Control Registers
Port 1 Status Registers
Port 2 Control Registers
Port 2 Status Registers
Port 3 Control Registers
Port 3 Status Registers
Port 4 Control Registers
Port 4 Status Registers
Port 5 Control Registers
Port 5 Status Registers
TOS Priority Control Registers
MAC Address Registers
Description
Chip family
0x0 is assigned to 95 series. (95XA)
Revision ID
The chip starts automatically after trying to read the
external EEPROM. If EEPROM does not exist, the
chip will use default values for all internal registers. If
EEPROM is present, the contents in the EEPROM
will be checked. The switch will check: (1) Register 0
= 0x95, (2) Register 1 [7:4] = 0x0. If this check is
OK, the contents in the EEPROM will override chip
register default values.
Reserved
Used to classify priority for incoming 802.1q packets.
“User priority” is compared against this value ≥:
classified as high priority < : classified as low priority
30
Mode
R/W
R/W
RW
RO
RO
RO
Based on real chip
revision, 0x02=B2,
0x03=B3, 0x04=B4,
0x05=B5, etc.
M9999-091508
Default
0x95
0x0
0x0
0x0
0x4