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| 型号： | KSZ8851-16MLLI |
| 厂商： | Micrel Inc |
| 文件页数： | 25/84页 |
| 文件大小： | 0K |
| 描述： | IC MAC CTLR 1PORT W/BUS 48-TQFP |
| 标准包装： | 250 |
| 控制器类型： | 以太网控制器，MAC/PHY |
| 接口： | 总线 |
| 电源电压： | 1.8V，2.5V，3.3V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 托盘 |
| 产品目录页面： | 1081 (CN2011-ZH PDF) |
| 其它名称： | 576-3505 |
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Micrel, Inc.
KSZ8851-16MLL/MLLI
March 11, 2014
31
Revision 2.2
In order to read received frames from RXQ without error, the software driver must use following steps:
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.
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).
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 KSZ8851-16MLL to use an external EEPROM. The EED_IO (pin 9) 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 KSZ8851-16MLL 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 KSZ8851-16MLL 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 KSZ8851-16MLL EEPROM format is given in Table 11.
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 KSZ8851-16MLL (available for user to use)
Table 11. KSZ8851-16MLL EEPROM Format
Loopback Support
The KSZ8851-16MLL provides two loopback modes, one is Near-end (Remote) loopback to support for remote diagnostic
of failure at line side, and the other is Far-end (Local) loopback to support for local diagnostic of failure at host side. In
loopback mode, the speed at the PHY port will be set to 100BASE-TX full-duplex mode.
Near-End (Remote) Loopback
Near-end (Remote) loopback is conducted at PHY port 1 of the KSZ8851-16MLL. The loopback path starts at the PHY
port’s receive inputs (RXP1/RXM1), wraps around at the same PHY port’s PMD/PMA, and ends at the PHY port’s transmit
outputs (TXP1/TXM1).
Bit [9] of register P1SCLMD (0xF4) is used to enable near-end loopback. The ports 1 near-end loopback path is illustrated
in the following Figure 9.
Far-End (Local) Loopback
Far-end (Local) loopback is conducted at Host of the KSZ8851-16MLL. The loopback path starts at the host port’s
transmit inputs (Tx data), wraps around at the PHY port’s PMD/PMA, and ends at the host port’s receive outputs (Rx data)
Bit [14] of register P1MBCR (0xE4) is used to enable far-end loopback at host side. The host far-end loopback path is
illustrated in Figure 9.
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相关代理商/技术参数 |
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| KSZ8851-16MLLI TR | 功能描述:以太网 IC 10/100BT Ethernet MAC + PHY with Generic (8, 16-bit) Bus Interface (I-Temp, Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8851-16MLLJ | 功能描述:以太网 IC Single-Port Ethernet MAC Controller with 8/16-Bit Non-PCI Interface (125C support) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8851-16MLLJ_10 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Single-Port Ethernet MAC Controller with 8-Bit or 16-Bit Non-PCI Interface |
| KSZ8851-16MLLU | 功能描述:以太网 IC Single-Port Ethernet Controller (Automotive Grade) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8851-16MLLU TR | 功能描述:以太网 IC Single-Port Ethernet Controller (Automotive Grade) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
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