[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-394037-105":59,"doc-detail-394037-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","stc15w404s-features-mcu-overview","STC15W404S Features - MCU Overview","","STC15W404S series MCU is a high-performance 1T architecture 8051-based single-chip microcontroller from STC MCU Limited, designed for high speed, stability, wide voltage operation, and strong anti-interference. It supports advanced ninth-generation encryption, runs instructions about 8–12 times faster than traditional 8051, and offers flexible internal high-precision R/C clocking to remove external crystal and reset circuits. Key peripherals include multiple timers/counters, dual DPTR, UART (multiple pin-group selection), and SPI, with ISP/IAP programming, reset voltage thresholds, power modes, and RS485 control for serial communication and control applications.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/stc15w404s-features-mcu-overview/394037/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/stc15w404s-features-mcu-overview/394037.png","ImageObject",300,407,{"name":92,"@type":93},"Rowan","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-09-26",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",12,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What are the main performance characteristics of STC15W404S compared with traditional 8051 MCUs?","Question",{"text":113,"@type":114},"STC15W404S uses a 1T architecture 8051 CPU with single clock per machine cycle, executing instructions about 8–12 times faster than a traditional 8051, while keeping a fully compatible instruction set.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How does STC15W404S handle clock and reset without external components?",{"text":118,"@type":114},"It integrates a high-precision internal R/C clock (with specified temperature drift) so external crystal is not required, and it integrates a highly reliable reset with 16 optional threshold levels, allowing complete removal of an external reset circuit.",{"name":120,"@type":111,"acceptedAnswer":121},"What serial communication interfaces and related capabilities are included?",{"text":122,"@type":114},"It provides a high-speed asynchronous UART that can switch among multiple pin groups, and a high-speed synchronous SPI. It also supports encryption download and RS485 control, and is typically used for serial communication or electrical control in noisy environments.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},394037,1790506319,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":36},1099514067415,"https://ap-avatar.wpscdn.com/avatar/100002539d78ffe74a7?x-image-process=image/resize,m_fixed,w_180,h_180&k=1779092875211072502","1. General Overview of STC15W404S series MCU  \n1.1 Introduction of STC15W404S series MCU (In abundant supply)  \nSTC15W404S series MCU is a single-chip microcontroller based on a high performance 1T architecture 8051 CPU, which is produced by STC MCU Limited. It is a new generation of 8051 MCU of high speed, high stability, wide voltage range, low power consumption and super strong anti-disturbance. Besides, STC15W404S series MCU is a MCU of super advanced encryption, because it adopts the ninth generation of STC encryption technology. With the enhanced kernel, STC15W404S series MCU is faster than a traditional 8051 in executing instructions (about 8~12 times the rate of a traditional 8051 MCU), and has a fully compatible instruction set with traditional 8051 series microcontroller. External expensive crystal can be removed by being integrated internal high-precise R/C clock(f0 .3%) with f 1% temperature drift (-40ć~+85ć) while f0 .6% in normal temperature (-20ć~+65ć) and wide frenquency adjustable between 5MHz and 35MHz. External reset curcuit also can be removed by being integrated internal highly reliable one with 16 levels optional threshold voltage of reset. The STC15W404S series MCU retains all features of the traditional 8051. In addition, it has three Timers/ Counters, dual DPTR and a high-speed asynchronous serial port----UART( can be regarded as 3 serial ports by shifting among 3 groups of pins) and a high-speed synchronous serial peripheral interface----SPI. STC15W404S series MCU is usually used in serial communication or electrical control or some occasion with strong disturbance.  \nIn Keil C development environment, select the Intel 8052 to compiling and only contain \u003C reg51.h > as header file.  \nSTC15 series MCU with super high-speed CPU core of STC-Y5 works 20% faster than STC early 1T series (such as STC12/STC11/STC10 series) at same clock frequency.  \n• Enhanced 8051 Central Processing Unit, 1T, single clock per machine cycle, faster 8~12 times than the rate of a traditional 8051.  \n• Operating voltage range: 5.5V ~ 2.5V.  \n• On-chip 4K / 8K / 10K / 13K / 15.5K FLASH program memory with flexible ISP/IAP capability, can be repeatedly erased more than 100 thousand times.  \n• on-chip 512 bytes SRAM: 256 byte scratch-pad RAM and 256 bytes of auxiliary RAM  \n• Be capable of addressing up to 64K byte of external RAM  \n• On-chip EEPROM with large capacity can be repeatedly erased more than 100 thousand times.  \n• Dual Data Pointer (DPTR) to speed up data movement  \n• ISP/IAP, In-System-Programming and In-Application-Programming , no need for programmer and emulator.  \n• Internal hghly reliable Reset with 16 levels optional threshold voltage of reset, external reset curcuit can be completely removed  \n• Internal high-precise R/C clock(f0 .3%) with f 1% temperature drift (-40ć~+85ć) while f0 .6%(-20ć~+65ć) in normal temperature and wide frenquency adjustable between 5MHz and 35MHz (5 .5296MHz / 11.0592MHz / 22.1184MHz / 33.1776MHz)  \n• No need external crystal and reset, and can output clock and low reset signal from MCU.  \n• Operating frequency range: 5-35MHz, is equivalent to traditional 8051:60~420MHz.  \n• A high-speed asynchronous serial port----UART( can be used simultaneously and regarded as 3 serial ports by shifting among 3 groups of pins):  \nUART1(RxD/P3.0, TxD/P3.1) can be switched to (RxD_2/P3.6, TxD_2/P3.7),  \nalso can be switched to (RxD_ 3/P1.6, TxD_ 3/P1.7) .  \n• A high-speed synchronous serial peripheral interface----SPI.  \n• Support the function of Encryption Download (to protect your code from being intercepted) .  \n• Support the function ofRS485 Control  \n• Code protection for flash memory access, excellent noise immunity, very low power consumption  \n• Power management mode: Slow-Down mode, Idle mode(all interrupt can wake up Idle mode), Stop/PowerDown mode.  \n• Timers which can wake up stop/power-down mode: have internal low-power special wake-up Timer.  \n• Resource which can wake up stop/power-down","cbCaiquAJ54Db29a","https://ap.wps.com/l/cbCaiquAJ54Db29a","pdf",204512,16,"English","# General Overview of STC15W404S series MCU\n## Introduction of STC15W404S series MCU\n## Core performance and compatibility\n## Clocking, reset, and programming features\n## Memory, DPTR, and peripherals\n## Serial communication: UART and SPI\n## Power management modes and wake-up sources\n## Timers/Counters and clock output","[{\"question\":\"What are the main performance characteristics of STC15W404S compared with traditional 8051 MCUs?\",\"answer\":\"STC15W404S uses a 1T architecture 8051 CPU with single clock per machine cycle, executing instructions about 8–12 times faster than a traditional 8051, while keeping a fully compatible instruction set.\"},{\"question\":\"How does STC15W404S handle clock and reset without external components?\",\"answer\":\"It integrates a high-precision internal R/C clock (with specified temperature drift) so external crystal is not required, and it integrates a highly reliable reset with 16 optional threshold levels, allowing complete removal of an external reset circuit.\"},{\"question\":\"What serial communication interfaces and related capabilities are included?\",\"answer\":\"It provides a high-speed asynchronous UART that can switch among multiple pin groups, and a high-speed synchronous SPI. It also supports encryption download and RS485 control, and is typically used for serial communication or electrical control in noisy environments.\"}]","STC15W404S Features - MCU Overview | PDF",1790397891]