KSZ8841-16MVL TR Micrel, KSZ8841-16MVL TR Datasheet - Page 85

• Manufacturer Part Number: KSZ8841-16MVL TR
• Description: Ethernet ICs Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free)
• Manufacturer: Micrel

Specifications of KSZ8841-16MVL TR

• Rohs: yes
• Product: Ethernet Controllers
• Package / Case: LQFP-128
• Mounting Style: SMD/SMT

MIB (Management Information Base) Counters
The KSZ8841M provides 32 MIB counters to monitor the port activity for network management. The MIB counters are
formatted as shown below.
Ethernet port MIB counters are read using indirect memory access. The address offset range is 0x00 to 0x1F.
October 2007
Micrel, Inc.
Bit
31
30
29-0
Offset
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
0xC
0xD
0xE
0xF
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
Name
Overflow
Count valid
Counter values
Counter Name
RxLoPriorityByte
Reserved
RxUndersizePkt
RxFragments
RxOversize
RxJabbers
RxSymbolError
RxCRCError
RxAlignmentError
RxControl8808Pkts
RxPausePkts
RxBroadcast
RxMulticast
RxUnicast
Rx64Octets
Rx65to127Octets
Rx128to255Octets
Rx256to511Octets
Rx512to1023Octets
Rx1024to1522Octets
TxLoPriorityByte
Reserved
TxLateCollision
TxPausePkts
TxBroadcastPkts
R/W
RO
RO
RO
Description
1 = counter overflow.
0 = no counter overflow.
1 = counter value is valid.
0 = 0 counter value is not valid.
Counter value (read clear)
Description
Rx lo-priority (default) octet count including bad packets
Reserved.
Rx undersize packets w/ good CRC
Rx fragment packets w/ bad CRC, symbol errors or alignment errors
Rx oversize packets w/ good CRC (max: 1536 bytes)
Rx packets longer than 1536 bytes w/ either CRC errors, alignment errors, or symbol errors
Rx packets w/ invalid data symbol and legal packet size.
Rx packets within (64,1916) bytes w/ an integral number of bytes and a bad CRC
Rx packets within (64,1916) bytes w/ a non-integral number of bytes and a bad CRC
Number of MAC control frames received by a port with 88-08h in EtherType field
Number of PAUSE frames received by a port. PAUSE frame is qualified with EtherType (88-
08h), DA, control opcode (00-01), data length (64B min), and a valid CRC
Rx good broadcast packets (not including error broadcast packets or valid multicast packets)
Rx good multicast packets (not including MAC control frames, error multicast packets or valid
broadcast packets)
Rx good unicast packets
Total Rx packets (bad packets included) that were 64 octets in length
Total Rx packets (bad packets included) that are between 65 and 127 octets in length
Total Rx packets (bad packets included) that are between 128 and 255 octets in length
Total Rx packets (bad packets included) that are between 256 and 511 octets in length
Total Rx packets (bad packets included) that are between 512 and 1023 octets in length
Total Rx packets (bad packets included) that are between 1024 and 1916 octets in length
Tx lo-priority good octet count, including PAUSE packets
Reserved.
The number of times a collision is detected later than 512 bit-times into the Tx of a packet
Number of PAUSE frames transmitted by a port
Tx good broadcast packets (not including error broadcast or valid multicast packets)
Table 11. Format of MIB Counters
85
Default
0
0
0x00000000
KSZ8841-16/32 MQL/MVL/MBL
M9999-102207-1.6