參數(shù)資料
型號(hào)： KSZ8851-16MLL TR
廠商： Micrel Inc
文件頁(yè)數(shù)： 24/84頁(yè)
文件大?。?/td> 0K
描述： IC MAC CTLR 1PORT W/BUS 48LQFP
產(chǎn)品培訓(xùn)模塊： KSZ8851 10/100 Embedded Controllers
標(biāo)準(zhǔn)包裝： 1,000
控制器類(lèi)型： 以太網(wǎng)控制器，MAC/PHY
接口： 總線
電源電壓： 1.8V，2.5V，3.3V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 48-LQFP
供應(yīng)商設(shè)備封裝： 48-LQFP（7x7）
包裝： 帶卷 (TR)
Micrel, Inc.
KSZ8851-16MLL/MLLI
March 11, 2014
30
Revision 2.2
Driver Routine for Receive Packet from KSZ8851-16MLL to Host Processor
The software driver receives data packet frames from the KSZ8851-16MLL device either as a result of polling or an
interrupt based service. When an interrupt is received, the OS invokes the interrupt service routine that is in the interrupt
vector table.
If your system has OS support, to minimize interrupt lockout time, the interrupt service routine should handle at interrupt
level only those tasks that require minimum execution time, such as error checking or device status change. The routine
should queue all the time-consuming work to transfer the packet from the KSZ8851-16MLL RXQ into system memory at
task level. The following Figure 8 shows the step-by-step for receive packets from KSZ8851-16MLL to host processor.
Note: Each DMA read operation from the host CPU to read RXQ frame buffer, the first read data (byte in 8-bit bus mode,
word in 16-bit bus mode and double word in 32-bit bus mode) is dummy data and must be discarded by host CPU.
Afterward, host CPU must read each frame data to align with double word boundary at end. For example, the host CPU
has to read up to 68 bytes if received frame is 65 bytes.
Figure 8. Host RX Single or Multiple Frames in Auto-Dequeue Flow Diagram
To program Rx frame count threshold in
RXFCTR, Rx data byte count threshold in
RXDBCTR or Rx frame duration timer
threshold in RXDTTR.
Enable all thresholds bits in RXQCR[5:7].
Set bit 4 in RXQCR to enable RXQ frame
buffer auto-dequeue
Enable Rx interrupt in IER[13]
Is Rx interrupt status bit set in
ISR[13] when interrupt asserted?
Rx interrupt source can be read from
bits in RXQCR[10:12]. Mask out further
Rx interrupt by set bit 13 to 0 in IER
and clear Rx interrupt status by write 1
to bit 13 in ISR.
Read total Rx frame count in RXFCTR
and read Rx frame header status in
RXFHSR and byte count in RXFHBCR.
Write 0x000 to RXFDPR[10:0] to clear
RX frame pointer
Write an “1” to RXQCR[3] reg to enable
RXQ read access, the Host CPU starts
read frame data from RXQ buffer.
Write an “0” to RXQCR[3] reg to end
RXQ read access
Yes
Is all Rx frames read?
No
Yes
No
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KSZ8851-16MLLU 功能描述:以太網(wǎng) IC Single-Port Ethernet Controller (Automotive Grade) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ8851-16MLLU TR 功能描述:以太網(wǎng) IC Single-Port Ethernet Controller (Automotive Grade) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ8851-16MQL 功能描述:以太網(wǎng) IC Single Ethernet Port + Generic (16-bit) Bus Interface(Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ8851-16MQL-EVAL 功能描述:以太網(wǎng)開(kāi)發(fā)工具 Single Ethernet Port + Generic (16-bit) Bus Interface(Lead Free) Eval Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類(lèi)型:Ethernet Transceivers 工具用于評(píng)估:KSZ8873RLL 接口類(lèi)型:RMII 工作電源電壓:
KSZ8851-16MQLI 功能描述:以太網(wǎng) IC Single Ethernet Port + Generic (16-bit) Bus Interface(Lead Free, I-Temp) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
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