KSZ8995M A4 Micrel Inc, KSZ8995M A4 Datasheet - Page 58

• Manufacturer Part Number: KSZ8995M A4
• Manufacturer: Micrel Inc

Specifications of KSZ8995M A4

• 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 Supply Voltage (max): 1.9/2.6/3.6V
• Operating Supply Voltage (min): 1.7/2.4/3V
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Compliant

KS8995M
For port 2, the base is 0x20, same offset definition (0x20-0x3f)
For port 3, the base is 0x40, same offset definition (0x40-0x5f)
For port 4, the base is 0x60, same offset definition (0x60-0x7f)
For port 5, the base is 0x80, same offset definition (ox80-0x9f)
Note:
All port dropped packet MIB counters do not indicate overflow or validity; therefore the application must keep track of overflow and valid conditions.
Examples:
(1) MIB counter read (read port 1 rx 64 counter)
M9999-062309
Address
Format of Per Port MIB Counters (16 entries)
31
30
29-0
Offset
0x100
0x101
0x102
0x103
0x104
0x105
0x106
0x107
0x108
0x109
Address
Format of All Port Dropped Packet MIB Counters
30-16
15-0
Write to reg110 with 0x1c (read MIB counters
selected)
Write to reg111 with 0xe (trigger the read operation)
Then
Read reg117 (counter value 31-24)
// If bit 31 = 1, there was a counter overflow.
// If bit 30 = 0, restart (reread) from this register.
Read reg118 (counter value 23-16)
Read reg119 (counter value 15-8)
Read reg120 (counter value 7-0)
Name
Overflow
Count Valid
Counter values
Counter Name
Port1 Tx Drop Packets
Port2 Tx Drop Packets
Port3 Tx Drop Packets
Port4 Tx Drop Packets
Port5 Tx Drop Packets
Port1 Rx Drop Packets
Port2 Rx Drop Packets
Port3 Rx Drop Packets
Port4 Rx Drop Packets
Port5 Rx Drop Packets
Name
Reserved
Counter values
Table 16. All Port Dropped Packet MIB Counters
Description
1, Counter overflow
0, No Counter overflow
1, Counter value is valid
0, Counter value is not valid
Counter value
Description
Tx packets dropped due to lack of resources
Tx packets dropped due to lack of resources
Tx packets dropped due to lack of resources
Tx packets dropped due to lack of resources
Tx packets dropped due to lack of resources
Rx packets dropped due to lack of resources
Rx packets dropped due to lack of resources
Rx packets dropped due to lack of resources
Rx packets dropped due to lack of resources
Rx packets dropped due to lack of resources
Description
Reserved
Counter value
58
Mode
RO
RO
RO
Mode
N/A
RO
Default
0
0
0
Default
N/A
0
Micrel, Inc.
June 2009