AN983B-BG-T-V8 Infineon Technologies, AN983B-BG-T-V8 Datasheet - Page 30
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AN983B-BG-T-V8
Manufacturer Part Number
AN983B-BG-T-V8
Description
IC PCI TO ETHERNET LAN 128-PQFP
Manufacturer
Infineon Technologies
Datasheet
1.AN983B-BG-T-V8.pdf
(116 pages)
Specifications of AN983B-BG-T-V8
Applications
Ethernet Controller
Interface
USB
Voltage - Supply
3 V ~ 3.6 V
Package / Case
128-BFQFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
AN983BBGTV8
SP000074652
SP000074652
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AN983B-BG-T-V8
Manufacturer:
Infineon Technologies
Quantity:
10 000
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MAC Control Frame and PAUSE Frame
Figure 14
The MAC Control frame is distinguished from other MAC frames only by their Length/Type field identifier. The MAC
Control Opcode defined in MAC Control Frame format for PAUSE function is 0001h. Besides, the PAUSE time is
specified in the MAC Control Parameters field with 2 Octets, unsigned integer, in the units of Slot-Times. The
range of possible PAUSE time is 0 to 65535 Slot-Times.
So, a valid PAUSE frame issued by a MAC control client (could be a switch or a bridge) will contain:
1. The destination address is set equal to the globally assigned 48 bit mulitcast address 01-80-C2-00-00-01, or
2. Filled the MAC Control Opcode field with 0001
3. 2 Octets of PAUSE time specified in the MAC Control parameter field to indicate the length of time for which
Receive Operation for PAUSE Function
Upon reception of a valid MAC Control frame, the AN983B/BX will start a timer for the length of time specified by
the MAC Control Parameters field. When the timer value reaches zero then the AN983B/BX ends PAUSE state.
However, a PAUSE frame should not affect the transmission of a frame that has been submitted to the MAC
(started Transmit out of the MAC and can’t be interrupted). On the other hand, the AN983B/BX shall not begin to
transmit a frame more than one Slot-Times after received a valid PAUSE frame with a non-zero PAUSE time. If
the AN983B/BX receives a PAUSE frame with a zero PAUSE time value, the AN983B/BX ends the PAUSE state
immediately.
Data Sheet
equal to the unicast address which the MAC control client wishes to inhibit its transmission of data frames.
the destination is wished to inhibit data frame transmission.
MAC Control Frame Format
(minFrameSize-160) / 8
6 Octets
6 Octets
2 Octets
2 Octets
Octets
H
.
30
Destination Address
Source Address
Length/Type=88-08h
MAC Control OPcode
MAC Control Parameter
Reserved(pads with
zeroes)
Functional Descriptions
Rev. 1.81, 2005-12-15
AN983B/BX
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