CP2105EK Silicon Laboratories Inc, CP2105EK Datasheet
CP2105EK
Specifications of CP2105EK
Available stocks
Related parts for CP2105EK
CP2105EK Summary of contents
Page 1
USB INGLE H IP Single-Chip USB to Dual UART Data Transfer Integrated USB transceiver; no external resistors required Integrated clock; no external crystal required Integrated 296-Byte One-Time Programmable ROM for storing customizable product information ...
Page 2
CP2105 2 Rev. 1.0 ...
Page 3
T C ABLE O F ONTENTS Section 1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 4
... Silicon Labs USBXpress driver set. See www.silabs.com for the latest application notes and product support information for the CP2105. An evaluation kit for the CP2105 (Part Number: CP2105EK) is available. It includes a CP2105-based USB-to- UART/RS-232 evaluation board, a complete set of VCP device drivers, USB and RS-232 cables, and full documentation ...
Page 5
Electrical Characteristics Table 1. Absolute Maximum Ratings Parameter Ambient Temperature Under Bias Storage Temperature Voltage on RST, GPIO or UART Pins with respect to GND Voltage with respect to GND DD IO Maximum Total Current ...
Page 6
CP2105 Table 3. UART and Suspend I/O DC Electrical Characteristics V = 3 –40 to +85 °C unless otherwise specified Parameters Output High Voltage ( ...
Page 7
Pinout and Package Definitions Name Pin # Type V 6 Power In DD Power Out V 5 Power In I/O Supply Voltage Input. IO GND 2 RST 9 D I/O REGIN 7 Power Regulator Input. This ...
Page 8
CP2105 Table 7. CP2105 Pin Definitions (Continued) Name Pin # Type CTS_SCI 18 SUSPEND 17* D Out RI_ECI 16* — DCD_ECI Special PP GPIO.0_ECI 15* D I/O DTR_ECI D Out GPIO.1_ECI 14* ...
Page 9
SUSPEND / RI_SCI 1 GND VIO 5 VDD 6 Figure 2. QFN-24 Pinout Diagram (Top View CP2105-GM 16 Top View 15 14 GND (optional) 13 Rev. 1.0 CP2105 CTS_SCI SUSPEND / RI_ECI NC ...
Page 10
CP2105 4. QFN-24 Package Specifications Table 8. QFN-24 Package Dimensions Dimension Min A 0.70 A1 0.00 b 0.18 D 4.00 BSC. D2 2.55 e 0.50 BSC. E 4.00 BSC. E2 2.55 Notes: 1. All dimensions shown are in millimeters (mm) ...
Page 11
Figure 4. QFN-24 Recommended PCB Land Pattern Table 9. QFN-24 PCB Land Pattern Dimensions Dimension Min Max C1 3.90 4.00 C2 3.90 4.00 E 0.50 BSC X1 0.20 0.30 Notes: General 1. All dimensions shown are in millimeters (mm) unless ...
Page 12
CP2105 5. USB Function Controller and Transceiver The Universal Serial Bus (USB) function controller in the CP2105 is a USB 2.0 compliant full-speed device with integrated transceiver and on-chip matching and pullup resistors. The USB function controller manages all data ...
Page 13
ECI Baud Rate Generation The baud rate generator for the enhanced interface is very flexible, allowing the user to request any baud rate in the range from 300 bps to 2.0 Mbps. If the baud rate cannot be directly ...
Page 14
CP2105 8. GPIO Pins The CP2105 supports five user-configurable GPIO pins for status and control information. The Standard Communication Interface (SCI) has three GPIO pins and the Enhanced Communication Interface (ECI) has two GPIO pins. To use the pins as ...
Page 15
GPIO.1_ECI—RS-485 Transceiver Bus Control GPIO.1_ECI is configurable as an RS-485 bus transceiver control pin or the Enhanced Communication Interface which is connected to the DE and RE inputs of the transceiver. When configured for RS-485 mode, the pin is ...
Page 16
CP2105 8.3. Hardware Flow Control (RTS and CTS) To utilize the functionality of the RTS and CTS pins of the CP2105, the device must be configured to use hardware flow control. RTS, or Ready To Send active-low output ...
Page 17
One-Time Programmable ROM The CP2105 includes an internal one-time programmable ROM that may be used to customize the USB Vendor ID (VID), Product ID (PID), Product Description String, Power Descriptor, Device Release Number, Interface Strings, and Device Serial Number ...
Page 18
CP2105 10. Voltage Regulator The CP2105 includes an on-chip 5 to 3.45 V voltage regulator. This allows the CP2105 to be configured as either a USB bus-powered device or a USB self-powered device. A typical connection diagram of the device ...
Page 19
Alternatively, if 3.0 to 3.6 V power is supplied to the V device with the voltage regulator bypassed. For this configuration, the REGIN input should be tied to V the voltage regulator. A typical connection diagram showing the device in ...
Page 20
CP2105 11. CP2105 Device Drivers There are two sets of device drivers available for CP2105 devices: the Virtual COM Port (VCP) drivers and the USBXpress Direct Access drivers. Only one set of drivers is necessary to interface with the device. ...
Page 21
Relevant Application Notes The following Application Notes are applicable to the CP2105. The latest versions of these application notes and their accompanying software are available at http://www.silabs.com/products/mcu/Pages/ApplicationNotes.aspx. AN144: CP21xx Device Customization Guide. This application note describes how to ...
Page 22
CP2105 OCUMENT HANGE IST Revision 0.1 to Revision 0.5 Updated ordering part number on page 1. Updated electrical specifications throughout Section 2. Added information on VPP pin in Section 3. Added Section 7. ...
Page 23
N : OTES Rev. 1.0 CP2105 23 ...
Page 24
... Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Silicon Laboratories, Silicon Labs, and USBXpress are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders 24 Rev ...