KSZ8995MA B3 Micrel Inc, KSZ8995MA B3 Datasheet - Page 53

• Manufacturer Part Number: KSZ8995MA B3
• Manufacturer: Micrel Inc

Specifications of KSZ8995MA 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

Semptember 2008
Register 28 (0x1C): Port 1 Control 12
Register 44 (0x2C): Port 2 Control 12
Register 60 (0x3C): Port 3 Control 12
Register 76 (0x4C): Port 4 Control 12
Register 92 (0x5C): Port 5 Control 12
Address
3
2
1
0
Address
7
6
5
4
3
2
1
Name
High Priority Receive
Rate Flow Control Enable
Transmit Differential
Priority Rate Control
Low Priority Transmit
Rate Control Enable
High Priority Transmit
Rate Control Enable
Name
Disable Auto-Negotiation
Forced Speed
Forced Duplex
Advertised Flow Control
Capability
Advertised 100BT Full-
Duplex Capability
Advertised 100BT Half-
Duplex Capability
Advertised 10BT Full-
Duplex Capability
Description
1, flow control may be asserted if the port’s high priority
receive rate is exceeded. To use this, differential
receive rate control must be on.
0, flow control is not asserted if the port’s high priority
receive rate is exceeded.
1, transmit rate control on both high and low priority
packets based on the rate counters defined by the high
and low priority packets respectively.
0, transmit rate control on any packets. The rate
counters defined in low priority will be used.
1, enable the port’s low priority transmit rate control
feature.
0, disable the port’s low priority transmit rate control
feature.
1, enable the port’s high priority transmit rate control
feature.
0, disable the port’s high priority transmit rate control
feature.
Description
1, disable auto-negotiation, speed and duplex are
decided by bit 6 and 5 of the same register.
0, auto-negotiation is on.
1, forced 100BT if AN is disabled (bit 7).
0, forced 10BT if AN is disabled (bit 7).
1, forced full-duplex if (1) AN is disabled or (2) AN is
enabled but failed.
0, forced half-duplex if (1) AN is disabled or (2) AN is
enabled but failed.
1, advertise flow control capability.
0, suppress flow control capability from transmission to
link partner.
1, advertise 100BT full-duplex capability.
0, suppress 100BT full-duplex capability from
transmission to link partner.
1, advertise 100BT half-duplex capability.
0, suppress 100BT half-duplex capability from
transmission to link partner.
1, advertise 10BT full-duplex capability.
0, suppress 10BT full-duplex capability from
transmission to link partner.
53
Mode
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0 For port 4 only,
there is a special
configure pin to
set the default pin
PCRS strap
option. Pull-down
(0): Force half-
duplex. Pull-up
(1): Force full-
duplex. Note:
PCRS has
internal pull down .
M9999-091508
Default
Default
0
0
0
0
0
1
1
1
1
1