【经验】使用爱普生实时时钟模块的高精度对时方法
搭载秒以下时间调节功能的爱普生实时时钟模块之解说
近年,随着电波手表的普及以及可从NTP时间服务器获取标准时间等,获取极为准确的时间已不再繁琐劳神。因此,用于金融、交通管理、电力控制、安全及体育等应用系统设计一般均以可参照正确时间为基础。这类处理系统在数据输入、输出部分必须设置为数众多的终端设备,且这些终端设备也需要有正确的时间。为了回应上述需求,爱普生向市场提供了内建以高稳定频率振荡的石英晶体单元的实时时钟模块。
该产品群中,内建TCXO数字式实时时钟模块、具有温度补偿功能的高精度产品如下:RX-4803SA/LC、RA4803SA(串行接口,以下称为“4803系列”)及RX-8803SA/LC、RA8803SA(I2C接口,以下称为“8803系列”)。这些产品可在-40至+85℃的温度范围内将频率输出精度保持在±3.4×10-6(相当于月差9秒),即每天平均时间误差控制在±0.3秒以下。
但是,即便上述产品具备高时间精度,有些顾客因用途需要亦要求对低于1秒的微小误差进行调节。实时时钟模块生成1秒的原理是以32.768kHz的石英晶体单元做为波源,通过分频而获得。如果需要让多台设备同时执行某一动作,则有必要对低于1秒的误差进行调节,使各设备的时间保持一致。4803系列与8803系列产品可调节低于1秒的误差,以回应这种需求。
很多爱普生的实时时钟模块搭载了RESET功能,可使用软件对上述低于1秒的误差进行调节。但是,使用软件调节时间的方法会因软件处理时间而产生时间偏差。这对需要以精确时间实现同步的用户来说,这个误差也须解决。为此,4803系列和8803系列又搭载了使用硬件调节时间的ERST功能。
本次说明内建TCXO数字式实时时钟模块4803系列与8803系列所搭载的用于调节低于1秒时间的RESET功能及ERST功能,并使用时序图等以具体实例进行说明。
使用爱普生实时时钟模块的高精度对时方法(低于1秒时间的调节)
4803系列与8803系列爱普生实时时钟模块可使用以下两种方法,对低于1秒的时间进行高精度调节:
• 使用RESET位对时 :应用软件的对时方法
• 使用ERST位对时 :应用硬件的对时方法
下文详细说明使用上述两种对时方法相关的寄存器、重置的动作及设定例。使用上述方法之前,务必先从外部输入已同步的时间信息。
1)使用RESET位对时例
以软件进行的RESET位对时可通过操作实时时钟模块的寄存器调节时间。除了4803系列与8803系列以外,很多爱普生的实时时钟模块产品采用了该手法。
关联寄存器
RESET位与动作说明(含时序图例)
RESET位设定为“1”后,计时电路的低于1秒的计时器将在命令结束时被重置。欲在特定时间开始准确计时时,可在设定时间后进行重置,之后将每秒更新秒位计时器。
使用RESET位的注意点
RESET位在下列前提条件之下执行动作:
• 只将RESET位设定为“1”,计时器不停止(继续计时);
• 置与其它命令相对独立,单独动作。写入RESET位后,命令输入结束后低于1秒的计时器被重置;
• 执行重置时不清除进位信息,为此请在设定秒寄存器后不到1秒的时间内重置低于1秒的计时器;
2)使用ERST位对时例
以硬件进行的ERST位对时可事先设定寄存器后输入事件信号,以此调节时间。该方法与之前说明的使用RESET位对时相比,不会因软件处理时间而产生时间偏差,因此能够以更准确的时间实现同步。
关联寄存器
ERST位与动作说明(含时序图例)
ERST位设定为“1”后,计时电路的低于1秒的计时器将在检测出输入EVIN端子的外部事件的同时被重置。欲在特定时间开始准确计时时,可在设定时间后向EVIN端子输入事件,之后将每秒更新秒位计时器。EHL位为“0”时,向EVIN端子输入信号的事件检测结果为低电平;EHL位为“1”时则检测出高电平(*a)。以下是EHL位设定为“1”(检测出高电平)时的动作例。
使用RESET位的注意点
ERST位在下列前提条件之下执行动作:
• 只将ERST位设定为“1”,计时器不停止(继续计时);
• ERST与其它命令相对独立,单独动作。写入ERST位后,输入事件时低于1秒的计时器被重置;
• 执行ERST时不清除进位信息,为此请在设定秒寄存器后不到 1 秒的时间内重置低于1秒的计时器;
• 将ERST位设定为“1”后,只要在事件发生之前将ERST位设定为“0”,就可使ERST功能失效。
使用ERST位的高精度对时设定例
时间与日历的设定例【设定值:2014年4月18日[周五] 15:30:00】
与1PPS信号同步的高精度时间设定
使用ERST位进行的硬件对时也可将GPS模块等的1PPS信号(每秒脉冲数,1Hz输出信号)做为外部事件输入,以此接收GPS的准确时间信号进行高精度对时。
下例是GPS模块输出的1PPS信号与时间数据输出的时序图。
请务必注意的是,该功能在GPS模块无法正确接收卫星信息的环境下有可能不能准确对时。
如至今为止的说明所示,爱普生在向顾客提供高性能(=时钟精度)实时时钟模块的同时,还将提供搭载顾客所需功能的产品,构建高精度同步时间处理系统而助力。而且,爱普生的实时时钟模块在出厂前均调整了频率精度,在保证了精度的基础上提供给顾客,所以使用时不需要调节频率,为顾客提高设计效率和产品质量做出贡献。
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手链列表
描述- ●Segment and Business area ■Printing Solutions Business Segment ▲Office and home printing business ▲Commercial and industrial printing business ■Visual Communications Business Segment ▲Visual communications business ■Manufacturing-related and wearables Business Segment ▲Manufacturing solutions business ▲Wearable products business ▲Microdevices and others business ▲PC business
型号- FC-12M,RA8804CE,XV4001BX,SR3225SAA,SG2016VHN,TG2016SMN,FA1008AN,TG-5006CE,TG-5006CG,SG-210 STF,SG3225EEN,RX-4803LC,SG3225CAN,TG7050CKN,FA-238,SG2016EGN,SG-8503CA,VG7050EBN,RX8130CE,SG7050EEN,SG3225VEN,TG-5510CA,TG7050SKN,RX-8025SA,TG2520SMN,TG-5510CB,SG5032VEN,SG7050CAN,SG-8201CJA,TG-5006CJ,SG-8018CA,SG-8018CB,TSX-3225,SG3225HBN,SG2520EHN,RX-4045SA,FA-128,SG-8201CJ,SG-8018CG,SG-8201CG,VG7050ECN,SG2016EHN,SG-8018CE,SG-8101CE,RX-8731LC,SG2016CAA,SG-8101CG,SG2520VHN,SG-8101CA,SG-8101CB,SG-3031CMA,TG5032SGN,RX-4035SA,EG-2102CB,EG-2121CB,SG2520EGN,SG2016CAN,SG-8506CA,VG7050CDN,RX8111CE,XG5032HAN,SG-3031CM,SG7050CCN,XV7011BB,XV-3510CB,RX8901CE,VG5032EFN,SG2016VGN,TG-5511CB,SG2520VGN,TG-5511CA,TG5032SFN,XG-2103CA,SG-8200CG,FC-13A,SG-8200CJ,RA4803SA,FC-135,SG5032EEN,VG7050EAN,TG5032CGN,FA-118T,SG5032CAN,XV4001KX,RX-8803SA,SG7050VAN,RX-4035LC,RX-8025NB,FA-238V,TG5032SMN,FA1612AS,XV7081BB,XV7001BB,RA8900CE,RTC-8564NB,RX4111CE,SG3225EAN,TG1612SLN,FC2012SN,MC-146,RA8000CE,RX-8035SA,RX8900SA,VG7050EFN,RX-4045NB,RX-4571SA,RX6110SA,FC3215AN,TG5032CFN,SG3225VAN,VG3225EFN,FA-20H,RX8900CE,RX-8803LC,FC2012AN,SG5032VAN,MG7050,FA2016AA,FA-238A,SG7050EAN,VG5032EDN,FC1610AN,RX-8035LC,XG-2102CA,XG-2121CA,FC-135R,RX-4571LC,TG5032CMN,VG5032VFN,XC1011SD,SG5032CCN,RA4000CE,XV7021BB,FA2016AS,TG3225CEN,TG2016SKA,RX-8564LC,TG5032SKN,VG7050VFN,MG7050 SERIES,FC1610BN,RX-4803SA,SG-9101CGA,RA8803SA,VG3225VFN,RX-8571SA,RX8804CE,FA1210AN,SG-8504CA,RX4901CE,TG7050CMN,SG2016HGN,FC2012AA,TG2520CEN,TG7050SMN,TG2016SLA,MC-30A,MC-306,RX-8571LC,TG2016SLN,TG-3541CEA,TG-3541CE,SG7050VEN,RTC-8564JE,SG2016HHN,SG5032EAN,SG-9101CB,TG5032CKN,SG-9101CA,RX-4571NB,RX8010SJ,RA-4565SA,SG-9101CE,FA2016ASA,SG-8101CGA,SG-9101CG,VG5032VDN
【应用】Epson 通信基带设备中的时钟解决方案
EPSON 能提供各种各样的晶体晶振、实时时钟。以内建DTCXO的高精度实时时钟RX-4803LC为例,其可选择的输出频率为32.768kHz,1024Hz,或1Hz,在-40度到85度内每月误差正负9秒
搬运注意事项
描述- 本资料主要针对晶体产品在使用过程中的注意事项进行详细说明。内容包括:产品使用条件、储存、安装等方面的注意事项,如防震、防辐射、化学物质、粘合剂、卤化物、静电、机械振动、PCB设计指南、存储条件、安装注意事项等。此外,还涉及晶体振荡器和实时时钟模块的使用环境、噪声、电源线、输出负载、未使用输入端口的处理、热影响、安装方向、电源开启等方面的注意事项。同时,对传感器之间的干扰、振动防护等方面也进行了说明。
型号- FC-12M,RA8804CE,XV4001BX,SR3225SAA,SG2016VHN,TG2016SMN,FA1008AN,TG-5006CE,TG-5006CG,SG-210 STF,SG3225EEN,RX-4803LC,SG3225CAN,TG7050CKN,FA-238,SG2016EGN,SG-8503CA,VG7050EBN,RX8130CE,SG7050EEN,SG3225VEN,TG-5510CA,TG7050SKN,RX-8025SA,TG2520SMN,TG-5510CB,SG5032VEN,SG7050CAN,SG-8201CJA,TG-5006CJ,SG-8018CA,SG-8018CB,TSX-3225,SG3225HBN,SG2520EHN,RX-4045SA,FA-128,SG-8201CJ,SG-8018CG,VG7050ECN,SG2016EHN,SG-8018CE,SG-8101CE,RX-8731LC,SG2016CAA,SG-8101CG,SG2520VHN,SG-8101CA,SG-8101CB,SG-3031CMA,TG5032SGN,RX-4035SA,EG-2102CB,EG-2121CB,SG2520EGN,SG2016CAN,SG-8506CA,VG7050CDN,RX8111CE,XG5032HAN,SG-3031CM,SG7050CCN,XV7011BB,XV-3510CB,RX8901CE,VG5032EFN,SG2016VGN,TG-5511CB,SG2520VGN,TG-5511CA,TG5032SFN,XG-2103CA,FC-13A,SG-8200CJ,RA4803SA,FC-135,SG5032EEN,VG7050EAN,TG5032CGN,FA-118T,SG5032CAN,RX-8803SA,XV4001KX,SG7050VAN,RX-4035LC,RX-8025NB,FA-238V,TG5032SMN,FA1612AS,XV7081BB,RA8900CE,XV7001BB,RTC-8564NB,RX4111CE,SG3225EAN,TG1612SLN,FC2012SN,MC-146,RA8000CE,RX-8035SA,RX8900SA,VG7050EFN,RX-4045NB,RX-4571SA,RX6110SA,FC3215AN,TG5032CFN,SG3225VAN,VG3225EFN,FA-20H,RX8900CE,RX-8803LC,FC2012AN,SG5032VAN,MG7050,FA2016AA,FA-238A,SG7050EAN,VG5032EDN,FC1610AN,RX-8035LC,XG-2102CA,XG-2121CA,FC-135R,RX-4571LC,TG5032CMN,VG5032VFN,SG5032CCN,RA4000CE,XV7021BB,FA2016AS,TG3225CEN,TG2016SKA,RX-8564LC,TG5032SKN,VG7050VFN,MG7050 SERIES,RX-4803SA,SG-9101CGA,RA8803SA,VG3225VFN,RX-8571SA,RX8804CE,FA1210AN,SG-8504CA,RX4901CE,TG7050CMN,FC2012AA,TG2520CEN,TG7050SMN,TG2016SLA,MC-30A,MC-306,RX-8571LC,TG2016SLN,TG-3541CEA,TG-3541CE,SG7050VEN,RTC-8564JE,SG5032EAN,SG-9101CB,TG5032CKN,SG-9101CA,RX-4571NB,RX8010SJ,RA-4565SA,SG-9101CE,FA2016ASA,SG-8101CGA,SG-9101CG,VG5032VDN
爱普生产品的EOL通知(最后订购:2024/10/30)
描述- 请注意,EPSON香港有限公司宣布以下产品将于2024年10月30日停止生产,并将于2025年3月31日停止发货。受影响的产品包括RX-4045SA、RX-4571SA、RX-8025SA等,包装方式将从管式包装改为卷切包装或任何数量/卷。请确认已通知相关客户,并按照最后下单日期下单。
型号- X1B000072000X 02,X1B000151000X 02,Q41802551000X 02,Q41404552000X 02,RX-8025SA,Q4145715X000X 02,X1B000232000X 02,X1B000172000X 02,RX-4803SA,RX-4035SA,RX-8571SA,RX-4045SA,RX-8035SA,RX-4571SA,RX6110SA,RX-8803SA,X1B000131000X 02,X1B000192000X 02
晶体产品处理注意事项
描述- 本资料为元器件应用指南,主要内容包括晶体产品的处理注意事项、通用注意事项、设计时的注意事项、振荡电路设计注意事项等。指南详细说明了晶体产品在存储、安装和使用过程中的注意事项,包括防震、防辐射、化学物质、粘合剂、卤化物化合物、静电、机械振动、PCB设计指南、存储注意事项、安装注意事项、超声波清洗、处理方法、使用环境等。此外,还针对晶体振荡器、实时时钟模块和传感器的使用提供了具体建议。
型号- FC-12M,RA8804CE,SR3225SAA,TG2016SMN,FC-12D,NS-32R,RA-8565SA,EG-2101CA,SG-8002CE,SG-8002CA,VG-4501CA,RX8130CE,TG-5510CA,RX-8025SA,TG2520SMN,NS-21R,SG-636 SERIES,XG-2123CA,SG3225HBN,VG-4513CA,RTC-4543SA,SG-8101CE,SG2016CAA,SG-8101CG,EG-4101CA,SG-8101CA,SG-8101CB,TG-5500CA,MA-506,TG5032SGN,MA-505,XG-1000CA,EG-2102CB,EG-2102CA,SG2520EGN,SG2016CAN,SG-8506CA,XG-1000CB,VG7050CDN,RX-4581NB,XV7011BB,XV-3510CB,FF-555,SG2520VGN,TG-5511CA,TG5032SFN,SG-310 SERIES,TG-5035CJ,TG-5035CE,FC-13A,FC-135,VG-4512CA,RTC-4574NB,TG5032CGN,XV4001KX,SG5032CAN,RX-4035LC,SG7050VAN,XV-9300LP,FA-238V,EG-2001CA,FA1612AS,XV7081BB,TG-5501CA,RA8900CE,TG2520SBN,RTC-8564NB,MA-406,FS-555,XV-3900CB,MC-146,RX-8035SA,RX8900SA,XV-9100CD,VG7050EFN,RX-4045NB,SG5032CBN,XV-9300LV,FA-20H,RX8900CE,FA2016AA,FA-238A,SG7050EAN,XG-2102CA,RX-8581SA,FC-135R,RX-4571LC,SG5032CCN,FA-128S,EG-2002CA,XV7021BB,FA2016AS,RX-8564LC,MG7050 SERIES,VG7050VFN,SG7050EBN,MA-306,VG2520CAN,FS-335,RX-4803SA,EG-2123CB,SG-9101CGA,RA8803SA,RX-8571SA,FA1210AN,RTC-4574SA,VG-4502CA,XV-3500CB,RTC-7301SF,FA2016AN,TG2520CEN,XV-8000CB,TG-3541CEA,SG-615P,SG7050VEN,RTC-8564JE,SG-9101CB,SG-9101CA,VG7050CAN,RX-4571NB,RX8010SJ,RA-4565SA,SG-9101CE,SG-8101CGA,SG-9101CG,TG5032CAN,XV4001BX,TG-5006CE,TG5032SAN,TG-5006CG,RX-4803LC,FA-238,SG-8503CA,RA-4574SA,VG7050EBN,SG-3030CM,SG7050EEN,SG3225VEN,VG-4231CE,SG-8002JC,VG-4231CB,VG-4231CA,SG-8002JA,SG7050CAN,TG-5006CJ,SG-8018CA,SG-8018CB,TSX-3225,RX-4045SA,SG-8018CG,VG7050ECN,SG-8018CE,RX-8731LC,SG7050CBN,RX-4035SA,EG-2121CB,SG-3040 SERIES,FA2016A,EG-2121CA,XG5032HAN,SG7050CCN,VG5032EFN,VG-4232CA,XG-2103CA,RA4803SA,VG7050EAN,FA-118T,RX-8803SA,RX-8025NB,EG-4121CA,RX-8581JE,XV7001BB,SG3225EAN,EG-2103CB,RX-4571SA,RX6110SA,TG5032CFN,VG3225EFN,SG3225VAN,TG5032CDN,RX-8803LC,FC2012AN,MC-405,SG5032VAN,MC-406,RX-8571NB,VG5032EDN,FC1610AN,RX-8035LC,TG5032SDN,XG-2121CA,VG5032VFN,TG2016SAN,TG5032CCN,EA-2102CB,RA-8581SA,TG3225CEN,RTC-4574JE,XV-8000LK,EG-2021CA,TG1612SAN,TG5032SCN,VG3225VFN,RX8804CE,SG-8504CA,EV7050EAN,RTC-72423,SG-210 SERIES,TG2016SBN,XV-9100LV,TG5032CBN,MC-30A,XV-9300CD,MC-306,RX-8571LC,FA-20HS,RX-4574LC,TG-3541CE,OG1409CAN,TG5032SBN,SG5032EAN,XV-9100LP,VG5032VDN
因零件(IC)生产结束而发出的产品停产通知
描述- SEIKO EPSON CORPORATION发布产品停产通知,因IC供应商停产,决定停止以下产品的生产和销售。涉及产品包括RTC、RA、RX、SG、TG、SG5032CBN、SG7050CBN、EG、VG、SG7050EBN、SG5032HBN、XV等系列,并提供替代产品建议。停产时间表包括最后购买日期为2021年8月30日,最后发货日期为2022年3月底。
型号- Q414574710001 XX,Q33310N70XXXX XX,X1G004491XXXX XX,SG-310SDN,Q414574C2000X XX,TG-3530SA,RX-8581NB,SG-3030JF,EG-2101CA,SG-3030JC,Q41458191000X XX,Q71350020XXXX XX,Q3806CAXXXXXX XX,X1B000412000100,SG3225CAN,RA-4574SA,X1B00002X000X XX,SG-8503CA,Q3102JC0X000X XX,X1G003931XXXX XX,SG-3030CM,SG7050EEN,VG-4231CE,SG-310SCN,VG-4231CB,Q4145745X000X XX,Q3103LC02000X XX,Q3801CA00XXXX XX,SG-8018CA,SG-8018CB,SG3225HBN,X1G004511XXXX XX,Q41A47452000X XX,X2A000011XXXX XX,SG-8018CG,RTC-4543SA,SG-8018CE,Q3802CA00XXXX XX,Q41457449X001 XX,SG7050CBN,X1G004461XXXX XX,SG-3031CMA,Q4145435X000X XX,RX-4801SA,Q418581710002 XX,EG-2102CA,X1G004741XXXX XX,RX-4581NB,VG7050CDN,X1G003691XXXX XX,SG5032HBN,SG-3031CM,Q71800020XXXX XX,VG-4232CA,X2A000091XXXX XX,X1B000211XXXX XX,RA4803SA,X1G003941XXXX XX,VG-4512CA,RTC-4574NB,RX-8803SA,RC4574SA,EG-2001CA,RX-8581JE,Q4185815X000X XX,Q3803CA00XXXX XX,Q4185819X0002 XX,XV-3900CB,Q3102JF0X000X XX,RX8900SA,VG7050EFN,RX-4571SA,RX6110SA,SG5032CBN,X1G003951XXXX XX,XG-2102CA,Q3721SA02000X XX,RX-8581SA,RX-4571LC,Q33310ND0XXXX XX,SG-3040LC,SG-210SXH,X1G004531XXXX XX,EG-2002CA,RA-8581SA,X1B00001X000X XX,RTC-4574JE,XV-8000LK,X1M000091XXXX XX,SG7050EBN,VG2520CAN,RX-4803SA,RA8803SA,RX-8571SA,SG-3030LC,Q42730181000X XX,RTC-72423,RTC-4574SA,XV-3500CB,RTC-7301SF,Q3102LC02000X XX,X1G004401XXXX XX,X1G003921XXXX XX,XV-8000CB,RX-4574LC,RX-8801SA,TG-3541CE,Q41A8815X0001 XX,VG7050CAN
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