ISL12022
3
FN6659.3
November 22, 2011
Table of Contents
I2C Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
X1, X2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
VBAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IRQ/FOUT (Interrupt Output/Frequency Output) . . . . . . . . . . . 9
Serial Clock (SCL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Serial Data (SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
VDD, GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Power Control Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Normal Mode (VDD) to Battery-Backup Mode (VBAT). . . . . . . 10
Battery-Backup Mode (VBAT) to Normal Mode (VDD). . . . . . . 10
Power Failure Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Brownout Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Battery Level Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Single Event and Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Frequency Output Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
General Purpose User SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . 11
I2C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Oscillator Compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Addresses [00h to 06h] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Addresses [07h to 0Fh] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Status Register (SR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Interrupt Control Register (INT). . . . . . . . . . . . . . . . . . . . . . . . 15
VDD Brownout Trip Voltage BITS (VDDTrip<2:0) . . . . . . . . . . 16
Initial AT and DT Setting Register (ITRO) . . . . . . . . . . . . . . . . 16
BETA Register (BETA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Final Analog Trimming Register (FATR). . . . . . . . . . . . . . . . . 19
Final Digital Trimming Register (FDTR) . . . . . . . . . . . . . . . . . 19
ALARM Registers (10h to 15h) . . . . . . . . . . . . . . . . . . . . . . . . 20
DST Control Registers (DSTCR) . . . . . . . . . . . . . . . . . . . . . . . . 21
TEMP Registers (TEMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
NPPM Registers (NPPM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
XT0 Registers (XT0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
ALPHA Hot Register (ALPHAH) . . . . . . . . . . . . . . . . . . . . . . . . 23
Addresses [00h to 7Fh] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
I2C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Protocol Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Power Supply Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 25
Battery-Backup Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Oscillator Crystal Requirements . . . . . . . . . . . . . . . . . . . . . . . 26
Layout Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Crystal Oscillator Frequency Compensation . . . . . . . . . . . . . 27
Measuring Oscillator Accuracy . . . . . . . . . . . . . . . . . . . . . . . . 27
Temperature Compensation Operation . . . . . . . . . . . . . . . . . 28
Daylight Savings Time (DST) Example . . . . . . . . . . . . . . . . . . 28
相关PDF资料
ISL12022MAIBZ IC RTC/CALENDAR TEMP SNSR 20SOIC
ISL12022MIBZ-T7A IC RTC/CALENDAR TEMP SNSR 20SOIC
ISL12022MIBZR5421 IC RTC/CALENDAR TEMP SNSR 20SOIC
ISL12023IVZ IC RTC/CLDR TEMP SNSR 14-TSSOP
ISL12024IRTCZ IC RTC/CALENDER 64BIT 8-TDFN
ISL12024IVZ IC RTC/CALENDAR EEPROM 8-TSSOP
ISL12025IVZ IC RTC/CALENDAR EEPROM 8-TSSOP
ISL12026IBZ-T7A IC RTC/CALENDAR EEPROM 8SOIC
相关代理商/技术参数
ISL12022M 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation, and Auto Daylight Saving
ISL12022M_09 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation, and Auto Daylight Saving
ISL12022M_10 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM,Integrated ±5ppm Temperature Compensation and Auto Daylight Saving
ISL12022MA 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving
ISL12022MA_10 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving
ISL12022MAIBZ 功能描述:实时时钟 REAL TIME CLK ENHANC CD ESD & MOISTURESIS RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube
ISL12022MAIBZ-T 功能描述:实时时钟 REAL TIME CLK ENHANC CD ESD & MOISTURESIS RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube
ISL12022M-EVAL 制造商:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated 5ppm Temperature Compensation, and Auto Daylight Saving