- 您现在的位置：买卖IC网 > PDF目录10798 > KSZ9021RN (Micrel Inc)IC TXRX 10/100/1000 SGL 48QFN PDF资料下载
参数资料
| 型号： | KSZ9021RN |
| 厂商： | Micrel Inc |
| 文件页数： | 46/58页 |
| 文件大小： | 0K |
| 描述： | IC TXRX 10/100/1000 SGL 48QFN |
| 特色产品： | KSZ9021RN Single-port Gigabit Transceiver |
| 标准包装： | 260 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 8/8 |
| 规程： | 千兆位以太网 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（7x7） |
| 包装： | 托盘 |
| 配用： | 576-3874-ND - BOARD EVALUATION FOR KSZ9021RN |
| 其它名称： | 576-3637 KSZ9021RN-ND |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页当前第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页
MCP444X/446X
DS22265A-page 50
2010 Microchip Technology Inc.
5.2
Wiper
Each tap point (between the RS resistors) is a
connection point for an analog switch. The opposite
side of the analog switch is connected to a common
signal which is connected to the Terminal W (Wiper)
pin.
A value in the volatile wiper register selects which
analog switch to close, connecting the W terminal to
the selected node of the resistor ladder.
The wiper can connect directly to Terminal B or to
Terminal A. A zero scale connections, connects the
Terminal W (wiper) to Terminal B (wiper setting of
000h). A full scale connection, connects the Terminal W
(wiper) to Terminal A (wiper setting of 100h or 80h). In
these configurations, the only resistance between the
Terminal W and the other Terminal (A or B) is that of the
analog switches.
A wiper setting value greater than full scale (wiper
setting of 100h for 8-bit device or 80h for 7-bit devices)
will also be a Full Scale setting (Terminal W (wiper)
connected to Terminal A). Table 5-1 illustrates the full
wiper setting map.
Equation 5-2 illustrates the calculation used to
determine the resistance between the wiper and
terminal B.
EQUATION 5-2:
RWB CALCULATION
TABLE 5-1:
VOLATILE WIPER VALUE VS.
WIPER POSITION MAP
5.3
WiperLock Technology
The MCP44XX device’s WiperLock technology allows
application-specific calibration settings to be secured in
the EEPROM without requiring the use of an additional
write-protect pin. There are four WiperLock Technology
configuration bits (WL0, WL1, WL2, and WL3). These
bits prevent the Nonvolatile and Volatile addresses and
bits for the specified resistor network from being writ-
ten.
The WiperLock technology prevents the serial
commands from doing the following:
Changing a volatile wiper value
Writing to the specified nonvolatile wiper memory
location
Changing the related volatile TCON register bits
For either Resistor Network 0, Resistor Network 1,
Resistor Network 2, or Resistor Network 3 (Potx), the
WLx bit controls the following:
Nonvolatile Wiper Register
Volatile Wiper Register
Volatile TCON register bits RxHW, RxA, RxW, and
RxB
High Voltage commands are required to enable and
disable WiperLock. Please refer to the Modify Write
command for operation.
5.3.1
POR/BOR OPERATION WHEN
WIPERLOCK TECHNOLOGY
ENABLED
The WiperLock Technology state is not affected by a
POR/BOR event. A POR/BOR event will load the
Volatile Wiper register value with the Nonvolatile Wiper
register value, refer to Section 4.1.
Wiper Setting
Properties
7-bit
8-bit
3FFh –
081h
3FFh –
101h
Reserved (Full Scale (W = A)),
Increment and Decrement
commands ignored
080h
100h
Full Scale (W = A),
Increment commands ignored
07Fh –
041h
0FFh –
081h
W = N
040h
080h
W = N (Mid Scale)
03Fh –
001h
07Fh –
001h
W = N
000h
Zero Scale (W = B)
Decrement command ignored
R
WB
R
ABN
256
()
--------------R
W
+
=
N = 0 to 256 (decimal)
R
WB
R
ABN
128
()
--------------R
W
+
=
N = 0 to 128 (decimal)
8-bit Device
7-bit Device
相关PDF资料 |
PDF描述 |
|---|---|
| VI-J5Y-MY-S | CONVERTER MOD DC/DC 3.3V 33W |
| VI-J5Y-MX-S | CONVERTER MOD DC/DC 3.3V 49.5W |
| VI-J5Y-MW-S | CONVERTER MOD DC/DC 3.3V 66W |
| LT6700CS6-3#TRMPBF | IC COMP DUAL 400MV REF TSOT23-6 |
| KSZ9021GN | TXRX ETHERNET GB GMII/MII 64-MLF |
相关代理商/技术参数 |
参数描述 |
|---|---|
| KSZ9021RN-EVAL | 功能描述:以太网开发工具 Gigabit Ethernet Transceiver with RGMII - Evaluation Board RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
| KSZ9021RNI | 功能描述:以太网 IC Gigabit Ethernet Transceiver with RGMII, I-Temp 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 |
| KSZ9031MNX | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:The KSZ9031MNX is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physicallayer transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable. |
| KSZ9031MNXCA | 功能描述:以太网 IC 1-Port Gigabit Ethernet PHY 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 |
| KSZ9031MNXCA TR | 功能描述:以太网 IC 1-Port Gigabit Ethernet PHY 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 |
发布紧急采购，3分钟左右您将得到回复。