參數(shù)資料
型號: KSZ8851SNL-EVAL
廠商: Micrel Inc
文件頁數(shù): 20/80頁
文件大?。?/td> 0K
描述: BOARD EVALUATION KSZ8851SNL
產(chǎn)品培訓(xùn)模塊: KSZ8851 10/100 Embedded Controllers
標(biāo)準(zhǔn)包裝: 1
系列: LinkMD®
主要目的: 接口,以太網(wǎng)控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8851SNL
主要屬性: 1 個端口,100BASE-TX/10BASE-T
次要屬性: SPI 接口,LinkMD 線纜診斷
已供物品: 板,文檔
產(chǎn)品目錄頁面: 1081 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: 576-3299-6-ND - IC CTLR MAC/PHY NON-PCI 32-MLF
576-3299-1-ND - IC CTLR MAC/PHY NON-PCI 32-MLF
576-3299-2-ND - IC CTLR MAC/PHY NON-PCI 32-MLF
576-3254-ND - IC CTLR MAC/PHY NON-PCI 32-QFN
其它名稱: 576-3293
Micrel, Inc.
KSZ8851SNL/SNLI
August 2009
27
M9999-083109-2.0
Figure 11. Host TX Single Frame in Manual Enqueue Flow Diagram
Host receives an Ethernet pkt from
upper layer and prepares transmit pkt
data (data, data_length, frame ID).
The transmit queue frame format is
shown in Table 6
Check if KSZ8851SNL TXQ
Memory size is available for this
transmit pkt?
(Read TXMIR Reg)
Write an 1?to RXQCR[3] reg to enable
TXQ write access, then Host issues a
SPI opcode=11 to start write transmit
data (control word, byte count and pkt
data) to TXQ memory. This is moving
transmit data from Host to KSZ8851SNL
TXQ memory until whole pkt is finished
Write an 0?to RXQCR[3] reg to end
TXQ write access
Write an 1?to TXQCR[0] reg to issue a
transmit command (manual-enqueue)
to the TXQ. The TXQ will transmit this
pkt data to the PHY port
Option to Read ISR[14] reg, it indicates
that the TXQ has completed to transmit
at least one pkt to the PHY port, then
Write 1?to clear this bit
Yes
No
Write the total amount of TXQ buffer
space which is required for next
transmit frame size in double-word
count in TXNTFSR[15:0] register
Set bit 1=1 in TXQCR register to
enable the TXQ memory available
monitor
Wait for interrupt
and check if the bit 6=1
(memory space available)
in ISR register
?
Yes
No
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