{"id":8925,"date":"2026-07-01T02:47:10","date_gmt":"2026-07-01T02:47:10","guid":{"rendered":"https:\/\/materialparts.com\/cp2102n-a02-gqfn28-2\/"},"modified":"2026-07-03T08:00:52","modified_gmt":"2026-07-03T08:00:52","slug":"cp2102n-a02-gqfn28-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/cp2102n-a02-gqfn28-2\/","title":{"rendered":"CP2102N-A02-GQFN28"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The CP2102N-A02-GQFN28 is a Silicon Labs USB 2.0 full-speed to UART bridge with integrated transceiver and oscillator, 3Mbaud, 960B OTP, and 6 GPIO. A02 revision with enhanced features. Packaged in QFN-28, -40C to +85C.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n
USB<\/td>\n2.0 Full-speed<\/td>\n<\/tr>\n
UART Baud<\/td>\nUp to 3 Mbps<\/td>\n<\/tr>\n
GPIO<\/td>\n6 configurable<\/td>\n<\/tr>\n
OTP<\/td>\n960 bytes<\/td>\n<\/tr>\n
Supply<\/td>\n3.0V to 3.6V<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nQFN-28<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • USB to UART bridge, no firmware<\/li>\n
  • 3Mbaud data rate<\/li>\n
  • Integrated 48MHz oscillator<\/li>\n
  • 960B OTP for custom VID\/PID<\/li>\n
  • 6 configurable GPIO pins<\/li>\n
  • USB BCS 1.2 charger detect<\/li>\n
  • RS485 transceiver support<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • USB debug\/programming port<\/li>\n
    • IoT module interface<\/li>\n
    • RS485 USB adapter<\/li>\n
    • Consumer electronics<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The CP2102N-A02-GQFN28 is a Silicon Labs USB 2.0 full-speed to UART bridge with integrated transceiver and oscillator, 3Mbaud, 960B OTP, and 6 GPIO. A02 revision with enhanced features. Packaged in QFN-28, -40C to +85C. Key Specifications USB 2.0 Full-speed UART Baud Up to 3 Mbps GPIO 6 configurable OTP 960 bytes Supply 3.0V […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[574],"chip_brand":[184],"class_list":["post-8925","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-cp2102n-a02-gqfn28","chip_brand-silabs"],"acf":{"brief_explanation":"USB-UART bridge, 3Mbaud, 960B OTP, 6 GPIO, QFN-28","date_code":"","package_case":"28-Pin QFN (5.0 x 5.0 x 0.65 mm)","in_stock":5200,"datasheet":"https:\/\/www.silabs.com\/documents\/public\/data-sheets\/cp2102n-datasheet.pdf","price":"$2.20 @ 1ku","product_introduction":"The CP2102N-A02-GQFN28 is a Silicon Labs USB-to-UART bridge controller in a 28-pin QFN package, revision A02 with enhanced features. The integrated USB transceiver and 48MHz oscillator eliminate all external analog components. The 960-byte one-time programmable (OTP) ROM stores custom USB Vendor ID, Product ID, serial number, and power descriptors for OEM branding. The A02 revision adds RS485 transceiver support with auto-direction control, 6 configurable GPIO pins (up from 4 on A01), and enhanced ESD protection on USB pins. The UART supports baud rates from 300bps to 3Mbps with +\/-1% accuracy across the range. USB Battery Charger Detection (BCS 1.2) enables charging current negotiation when connected to USB charger ports. Remote wakeup capability allows the device to wake a suspended USB host. The 512-byte TX and RX FIFO buffers prevent data loss during USB latency spikes. Royalty-free VCP drivers are available for Windows, macOS, Linux, and Android. The CP2102N is pin-compatible with CP2101\/2\/9 in QFN-28. Packaged in QFN-28 rated for -40C to +85C.","working_principle":"The CP2102N-A02 integrates a USB 2.0 full-speed device controller, UART interface, and bridge logic. The USB controller handles enumeration and data transfer according to CDC ACM class specification. The host VCP driver creates a virtual COM port that applications access via standard serial API. The bridge logic transfers data between USB bulk endpoints and UART FIFOs, handling data format conversion and flow control. The integrated 48MHz RC oscillator is factory-calibrated to meet USB clock tolerance without an external crystal. The OTP ROM stores USB descriptors read during enumeration. The 6 GPIO pins are mapped through OTP or runtime registers to UART modem control lines (RTS, CTS, DTR, DSR, DCD, RI) or general-purpose I\/O. The RS485 auto-direction control automatically asserts the RS485 driver enable during UART transmission and deasserts it after the last byte, eliminating a GPIO control line. The voltage regulator generates the internal 3.3V from VBUS or VREGIN, with the REGOUT pin providing a 3.3V output for external circuitry.","pin_description":"

      28-pin QFN with key signals: D+\/D- (USB data), VBUS (USB bus detect), VREGIN (3.0-3.6V supply), REGOUT (3.3V output), GND, TXD\/RXD (UART data), RTS\/CTS\/DTR\/DSR\/DCD\/RI (modem control or GPIO), GPIO0-GPIO5 (configurable), RST (reset), SUSPEND\/SUSPEND-BAR (USB suspend), NC. Refer to datasheet for complete 28-pin QFN ball map.<\/p>","application_scenarios":"

      • MCU debug UART interface with custom VID\/PID for OEM branding and 960B OTP<\/li>\n
      • USB-to-RS485 adapter with auto-direction control and 3Mbaud data transfer<\/li>\n
      • IoT module USB programming port with 6 GPIO for control signals<\/li>\n
      • Consumer electronics USB serial port with BCS 1.2 charger detection<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        CP2102N-A01-GQFN28<\/td>Silicon Labs<\/td>A01, fewer GPIO<\/td><\/tr>
        CP2102-GM<\/td>Silicon Labs<\/td>Original, ext crystal<\/td><\/tr>
        FT232RL<\/td>FTDI<\/td>Similar USB-UART<\/td><\/tr>
        CH340G<\/td>WCH<\/td>Lower cost alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8925","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=8925"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8925\/revisions"}],"predecessor-version":[{"id":9458,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8925\/revisions\/9458"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=8925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=8925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=8925"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=8925"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}