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参数资料
| 型号： | MCP4152-103E/SN |
| 厂商： | Microchip Technology |
| 文件页数： | 22/59页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL SNGL 10K RHEO 8SOIC |
| 标准包装： | 100 |
| 接片： | 257 |
| 电阻（欧姆）： | 10k |
| 电路数： | 1 |
| 温度系数： | 标准值 150 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | 4 线 SPI（芯片选择） |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 管件 |
| 产品目录页面： | 675 (CN2011-ZH PDF) |
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Micrel, Inc.
KSZ8051MNL/RNL
July 2010
29
M9999-070910-1.0
Interrupt (INTRP)
INTRP (pin 21) is an optional interrupt signal that is used to inform the external controller that there has been a status
update to the KSZ8051MNL/RNL PHY register. Register 1Bh, bits [15:8] are the interrupt control bits to enable and
disable the conditions for asserting the INTRP signal. Register 1Bh, bits [7:0] are the interrupt status bits to indicate which
interrupt conditions have occurred. The interrupt status bits are cleared after reading register 1Bh.
Register 1Fh, bit 9 sets the interrupt level to active high or active low. The default is active low.
The MII management bus option gives the MAC processor complete access to the KSZ8051MNL/RNL control and status
registers. Additionally, an interrupt pin eliminates the need for the processor to poll the PHY for status change.
HP Auto MDI/MDI-X
HP Auto MDI/MDI-X configuration eliminates the confusion of whether to use a straight cable or a crossover cable
between the KSZ8051MNL/RNL and its link partner. This feature allows the KSZ8051MNL/RNL to use either type of cable
to connect with a link partner that is in either MDI or MDI-X mode. The auto-sense function detects transmit and receive
pairs from the link partner, and then assigns transmit and receive pairs of the KSZ8051MNL/RNL accordingly.
HP Auto MDI/MDI-X is enabled by default. It is disabled by writing a one to register 1Fh, bit 13. MDI and MDI-X mode is
selected by register 1Fh, bit 14 if HP Auto MDI/MDI-X is disabled.
An isolation transformer with symmetrical transmit and receive data paths is recommended to support auto MDI/MDI-X.
The IEEE 802.3 Standard defines MDI and MDI-X as follows:
MDI
MDI-X
RJ-45 Pin
Signal
RJ-45 Pin
Signal
1
TX+
1
RX+
2
TX-
2
RX-
3
RX+
3
TX+
6
RX-
6
TX-
Table 6. MDI/MDI-X Pin Definition
Straight Cable
A straight cable connects a MDI device to a MDI-X device, or a MDI-X device to a MDI device. The following figure depicts
a typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X).
Figure 6. Typical Straight Cable Connection
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