收藏本站
ISL12022M
18
FN6668.9
June 20, 2012
ALPHA Register (ALPHA)
The ALPHA variable is 8 bits and is defined as the temperature
coefficient of crystal from -40°C to T0, or the ALPHA Cold (there is
an Alpha Hot register that must be programmed as well). It is
normally given in units of ppm/°C2, with a typical value of -0.034.
The ISL12022M device uses a scaled version of the absolute value
of this coefficient in order to get an integer value. Therefore,
ALPHA <7:0> is defined as the (|Actual ALPHA Value| x 2048) and
converted to binary. For example, a crystal with Alpha of
-0.034ppm/°C2 is first scaled (|2048*(-0.034)| = 70d) and then
converted to a binary number of 01000110b.
The practical range of Actual ALPHA values is from -0.020 to -0.060.
The ISL12022M has a preset ALPHA value corresponding to the
crystal in the module. This value is recalled on initial power-up and
is preset in device production. It is READ ONLY and cannot be
overwritten by the user.
BETA Register (BETA)
The BETA register has special Write properties. Only the TSE,
BTSE and BTSR bits can be written; the BETA bits are READ-ONLY.
A write to both bytes in this register will only change the 3 MSB’s
(TSE, BTSE, BTSR), and the 5 LSB’s will remain the same as set
at the factory.
TEMPERATURE SENSOR ENABLED BIT (TSE)
This bit enables the Temperature Sensing operation, including the
temperature sensor, A/D converter and FATR/FDTR register
adjustment. The default mode after power-up is disabled: (TSE = 0).
To enable the operation, TSE should be set to 1. (TSE = 1). When
temp sense is disabled, the initial values for IATR and IDTR registers
are used for frequency control.
When TSE is set to 1, the temperature conversion cycle begins and
will end when two temperature conversions are completed. The
average of the two conversions is in the TEMP registers.
0
100
11
+13
0
101
00
+12
0
101
01
+11
0
101
10
+10
0
101
11
+9
0
110
00
+8
0
110
01
+7
0
110
10
+6
0
110
11
+5
0
111
00
+4
0
111
01
+3
0
111
10
+2
0
111
11
+1
1
000
00
0
1
000
01
-1
1
000
10
-2
1
000
11
-3
1
001
00
-4
1
001
01
-5
1
001
10
-6
1
001
11
-7
1
010
00
-8
1
010
01
-9
1
010
10
-10
1
010
11
-11
1
011
00
-12
1
011
01
-13
1
011
10
-14
1
011
11
-15
1
100
00
-16
1
100
01
-17
1
100
10
-18
1
100
11
-19
1
101
00
-20
1
101
01
-21
1
101
10
-22
1
101
11
-23
1
110
00-24
1
110
01
-25
1
110
10
-26
TABLE 12. IATRO TRIMMING RANGE (Continued)
IATR05
IATR04
IATR03
IATR02
IATR01
IATR00
TRIMMING
RANGE
11
101
1-27
11
110
0
-28
11
110
1
-29
11
111
0
-30
11
111
1-31
TABLE 13. ALPHA REGISTER
ADDR 7
654
3210
0Ch D ALPHA6 ALPHA5 ALPHA4 ALPHA3 ALPHA2 ALPHA1 ALPHA0
TABLE 14.
ADDR
7
6
5
4
321
0
0Dh
TSE BTSE BTSR BETA4 BETA3 BETA2 BETA1 BETA0
TABLE 12. IATRO TRIMMING RANGE (Continued)
IATR05
IATR04
IATR03
IATR02
IATR01
IATR00
TRIMMING
RANGE
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
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
ISL12027IV27AZ IC RTC/CALENDAR EEPROM 8-TSSOP
ISL12028IVZ IC RTC/CALENDAR EEPROM 14-TSSOP
相关代理商/技术参数
ISL12022MIBZ-TR5421 功能描述:实时时钟 REAL TIME CLK W/MFK IMPROVED ESD AIR 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
ISL12022MR5421 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery Backed SRAM, Integrated 5ppm
ISL12022M-R5421 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Accuracy RTC Modules, Feature-Rich RTCs
ISL12023 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Daylight Saving
ISL12023IVZ 功能描述:实时时钟 REAL TIME CLK/CLNDR W/TEMP COM 14 L 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
ISL12023IVZ-T 功能描述:实时时钟 REAL TIME CLK/CLNDR W/TEMP COM 14 L 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
ISL12024 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Real-Time Clock/Calendar with Embedded Unique ID
ISL12024IBZ 功能描述:实时时钟 REAL TIME CLK/CLNDR W/EEPROM IN 8LD 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