Datasheet > AN114

AN114

更新时间： 2024-10-29 03:18:47

品牌	Logo	应用领域
XICOR		微控制器
页数	文件大小	规格书
12页	252K
描述
Interfacing the X9408/X9418 XDCP to 8051 Microcontrollers

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

AN114 数据手册

Application Note

AN 114

Interfacing the X9408/X9418 XDCP to 8051 Microcontrollers

by Applications Staff,

This application note describes the routines for the

control of an X9408 or X9418 digitally controllable

potentiometer. The X9408/X9418 devices have a variety

of different instructions that provide ﬂexibility to the

designer. Additionally, the nonvolatile nature of the

device allows for stored wiper positions that can be

retrieved after power cycles.

For those instructions which program the nonvolatile

data registers (XFR_WCR, GXFR_WCR, &

WRITE_DR), acknowledge polling has been imple-

mented to determine an early completion of the internal

write cycle. Although this is automatically handled by

the routines, a word or two regarding the procedure

should be informative.After issuing a start condition, the

master sends a slave address and receives an acknowl-

edge. It then issues an instruction byte to the X9408/

X9418 and again receives an acknowledge. If necessary,

it now transmits the data byte and receives a ﬁnal

acknowledge. The master must then initiate a stop condi-

tion which will cause the X9408/X9418 to begin an

internal write cycle. The X9408/X9418 pins go to high

impedance until this internal cycle is complete. The

The following code implements all of the available

X9408/X9418 instructions using a standard bi-direc-

tional bus protocol. Although the subroutines occupy

about 300 bytes of program memory, designers who

won't need to implement all of the instructions can

shorten the code by removing any unnecessary routines.

However, this will necessitate the reassembly of the

code.

+5V

10K

P0.0

P0.1

P0.2

P0.3

P0.4

P0.5

P0.6

P0.7

P1.0

P1.1

P1.2

P1.3

P1.4

P1.5

P1.6

P1.7

SCL

SDA

VH0

VW0

VL0

VH1

VW1

VL1

VH2

VW2

VL2

INT0

INT1

RXD

TXD

P2.0

P2.1

P2.2

P2.3

P2.4

P2.5

P2.6

P2.7

VH3

VW3

VL3

VCC

V+

V-

ALE/P

PSEN

VSS

X940

EA/VP

RST

80C51

-5V

Figure 1. Connecting the X9408 to an 80C51 microcontroller

REV 1.1 11/12/02

1 of 12

www.xicor.com

12 3 4 5 6 7...12

中文翻译

下载PDF

与AN114相关器件

型号	品牌	获取价格	描述	数据表
AN1149-3	LUMILEDS	获取价格	Electrical Design Considerations for SuperFlux LEDs
AN1149-3A	LUMILEDS	获取价格	Advanced Electrical Design Models
AN1149-3B	LUMILEDS	获取价格	SuperFlux & SnapLED Emitter Forward Voltage Data
AN1149-4	LUMILEDS	获取价格	Thermal Management Considerations for SuperFlux LEDs
AN1149-5	LUMILEDS	获取价格	Secondary Optics Design Considerations for SuperFlux LEDs
AN1149-6	LUMILEDS	获取价格	Reliability Considerations for SuperFlux LEDs
AN1149FHK	PANASONIC	获取价格	Switching Regulator, PQCC48, TQFP-48
AN1149NFHK	ETC	获取价格	General-Purpose Linear IC - Voltage Regulater - DC-AC Switching Regulator
AN115	ETC	获取价格	AN115锁相环调频立体声解码电路:
AN1150S	PANASONIC	获取价格	Switching Controller, PDSO8, 0.225 INCH, PLASTIC, SOP-8

与AN114相关文章

三星深化印度制造布局，供应链本地化进程加速
2024-10-29

15
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

17
纳微科技震撼发布GaNSlim革新氮化镓功率芯片
2024-10-18

41
意法半导体发布第四代SiC技术，助力电动汽车电驱
2024-10-15

49

产品中心

服务支持

精选活动

关于我们

帮助中心

AN114

AN114 数据手册

与AN114相关器件

与AN114相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

AN114

AN114 数据手册

与AN114相关器件

与AN114相关文章

您还可以找

您在本页遇到什么问题？