參數(shù)資料
型號: STE10/100E
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP128
封裝: 14 X 20 MM, 2.70 MM HEIGHT, PLASTIC, QFP-128
文件頁數(shù): 49/66頁
文件大?。?/td> 396K
代理商: STE10/100E
53/66
STE10/100A
or to the unicast address to which the MAC control client requests to inhibit its transmission of data
frames.
s
The MAC Control Opcode field set to 0001h.
s
2 Octets of PAUSE time specified in the MAC Control parameter field to indicate the length of time
for which the destination is requested to inhibit data frame transmission.
s
Receive Operation for PAUSE function
Upon reception of a valid MAC Control frame, the STE10/100A will start a timer for the length of time
specified by the MAC Control Parameters field. When the timer value reaches zero, the STE10/100A
exits the PAUSE state. However, a PAUSE frame will not affect the transmission of a frame that has
been submitted to the MAC (i.e., once a transmit out of the MAC is begun, it can’t be interrupted).
Conversely, the STE10/100A will not begin to transmit a frame more than one slot-time after valid
PAUSE frame is received a with a non-zero PAUSE time. If the STE10/100A receives a PAUSE frame
with a zero PAUSE time value, the STE10/100A exits the PAUSE state immediately.
Figure 15. PAUSE operation receive state diagram
Wait for Transmission Completed
transmission_in_progress = false *
DA
≠ (01-80-C2-00-00-01 + Phys-address)
DA = (01-80-C2-00-00-01 + Phys-address)
PAUSE FUNCTION
n_slots_rx = data [17:32]
Start pause_timer (n_slots_rx * slot_time)
UCT
END PAUSE
Opcode = PAUSE Function
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