参数资料
型号: KSZ8864RMNI
厂商: Micrel Inc
文件页数: 4/111页
文件大小: 0K
描述: IC ETHERNET SWITCH 4PORT 64QFN
特色产品: KSZ8864RMN Ethernet Switches
标准包装: 348
系列: *
其它名称: 576-3995
1997 Microchip Technology Inc.
DS30444E - page 101
PIC16C9XX
13.5
Voltage Generation
There are two methods for LCD voltage generation,
internal charge pump, or external resistor ladder.
13.5.1
CHARGE PUMP
The LCD charge pump is shown in Figure 13-13. The
1.0V - 2.3V regulator will establish a stable base volt-
age from the varying battery voltage. This regulator is
adjustable through the range by connecting a variable
external resistor from VLCDADJ to ground. The poten-
tiometer provides contrast adjustment for the LCD. This
base voltage is connected to VLCD1 on the charge
pump. The charge pump boosts VLCD1 into VLCD2 =
2*VLCD1 and VLCD3 = 3 * VLCD1. When the charge pump
is not operating, Vlcd3 will be internally tied to VDD. See
the Electrical Specications section for charge pump
capacitor and potentiometer values.
13.5.2
EXTERNAL R-LADDER
The LCD module can also use an external resistor lad-
der
(R-Ladder)
to
generate
the
LCD
voltages.
Figure 13-13 shows external connections for static and
1/3 bias. The VGEN (LCDCON<4>) bit must be cleared
to use an external R-Ladder.
FIGURE 13-13:CHARGE PUMP AND RESISTOR LADDER
C2
VLCD2
VLCD1
VLCD3
C1
VDD
VLCDADJ
10
A
Connections for
internal charge
pump, VGEN = 1
VDD
Connections for
external R-ladder,
1/3 Bias,
VGEN = 0
Connections for
external R-ladder,
Static Bias,
VGEN = 0
nominal
Charge Pump
LCDEN
SLPEN
0.47
F*
0.47
F*
0.47
F*
0.47
F*
10k*
5k*
10k*
130k*
100k*
* These values are provided for design guidance only and should be
optimized to the application by the designer.
相关PDF资料
PDF描述
KSZ8873FLLI IC ETHERNET SWITCH 3PORT 64LQFP
KSZ8873MLLJ IC ETHERNET SWITCH 3PORT 64LQFP
KSZ8873MMLI IC ETHERNET SWITCH 3PORT 64LQFP
KSZ8893FQL IC SWITCH FAST ETH 3PORT 128PQFP
KSZ8895MQI IC ETHERNET SWITCH 5PORT 128PQFP
相关代理商/技术参数
参数描述
KSZ8864RMNU 功能描述:以太网 IC 4-Port 10/100BT Switch with MII/RMII (Automotive) 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
KSZ8864RMNU TR 制造商:Micrel Inc 功能描述:IC ETHERNET SWITCH 4PORT 64MLF
KSZ8873FLL 功能描述:以太网 IC 3-Port Fast Ethernet Switch with 2x FX Ports - 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
KSZ8873FLL-EVAL 功能描述:以太网开发工具 3-Port Fast Ethernet Switch with 2x FX Ports - 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:
KSZ8873FLLI 功能描述:以太网 IC 3-Port Fast Ethernet Switch with 2x FX Ports (Industrial 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