參數(shù)資料
型號(hào)： KSZ8851SNL-EVAL
廠商： Micrel Inc
文件頁數(shù)： 25/80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： 否
已用 IC / 零件： KSZ8851SNL
主要屬性： 1 個(gè)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)
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576-3299-1-ND - IC CTLR MAC/PHY NON-PCI 32-MLF
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其它名稱： 576-3293
Micrel, Inc.
KSZ8851SNL/SNLI
August 2009
31
M9999-083109-2.0
In order to read received frames from RXQ without error, the software driver must use following steps:
1.
When receive interrupt occurred and software driver writes “1” to clear the RX interrupt in ISR register; the
KSZ8851 will update Receive Frame Counter (RXFCTR) Register for this interrupt.
2.
When software driver reads back Receive Frame Count (RXFCTR) Register; the KSZ8851 will update both
Receive Frame Header Status and Byte Count Registers (RXFHSR/RXFHBCR).
3.
When software driver reads back both Receive Frame Header Status and Byte Count Registers
(RXFHSR/RXFHBCR); the KSZ8851 will update next receive frame header status and byte count registers
(RXFHSR/RXFHBCR).
EEPROM Interface
It is optional in the KSZ8851SNL to use an external EEPROM. The EED_IO (pin 6) must be pulled high to use external
EEPROM otherwise this pin pulled low or floating without EEPROM.
An external serial EEPROM with a standard microwire bus interface is used for non-volatile storage of information such as
the host MAC address. The KSZ8851SNL can detect if the EEPROM is a 1KB (93C46) or 4KB (93C66) EEPROM device
(the 93C46 and the 93C66 are typical EEPROM devices). The EEPROM must be organized as 16-bit mode.
If the EED_IO pin is pulled high, then the KSZ8851SNL performs an automatic read of the external EEPROM words 0H to
3H after the de-assertion of Reset. The EEPROM values are placed in certain host-accessible registers. EEPROM
read/write functions can also be performed by software read/writes to the EEPCR (0x22) registers.
The KSZ8851SNL EEPROM format is given in Table 12.
WORD
15
8
7
0
0H
Reserved
1H
Host MAC Address Byte 2
Host MAC Address Byte 1
2H
Host MAC Address Byte 4
Host MAC Address Byte 3
3H
Host MAC Address Byte 6
Host MAC Address Byte 5
4H – 6H
Reserved
7H-3FH
Not used for KSZ8851SNL (available for user to use)
Table 12. KSZ8851SNL EEPROM Format
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