CP2101EK View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

CP2101EK

SINGLE-CHIP USB TO UART BRIDGE

Silicon Laboratories 

CP2101

4. Pinout and Package Definitions

Name

VDD

Pin #

6

Table 4.1. Pin Definitions for the CP2101

Type

Description

Power In 3.0–3.6 V Power Supply Voltage Input.

Power Out 3.3 V Voltage Regulator Output. See Section 9.

GND

3

Ground

RST

9

D I/O Device Reset. Open-drain output of internal POR or VDD monitor. An

external source can initiate a system reset by driving this pin low for at

least 15 µs.

REGIN

7

Power In 5 V Regulator Input. This pin is the input to the on-chip voltage regula-

tor.

VBUS

8

D In VBUS Sense Input. This pin should be connected to the VBUS signal

of a USB network. A 5 V signal on this pin indicates a USB network

connection.

D+

4

D I/O USB D+

D–

5

D I/O USB D–

TXD

26

D Out Asynchronous data output (UART Transmit)

RXD

25

D In Asynchronous data input (UART Receive)

CTS

23*

D In Clear To Send control input (active low)

RTS

24*

D Out Ready to Send control output (active low)

DSR

27*

D in Data Set Ready control input (active low)

DTR

28*

D Out Data Terminal Ready control output (active low)

DCD

1*

D In Data Carrier Detect control input (active low)

RI

2*

D In Ring Indicator control input (active low)

SUSPEND 12*

D Out This pin is driven high when the CP2101 enters the USB suspend

state.

SUSPEND 11*

D Out This pin is driven low when the CP2101 enters the USB suspend state.

NC 10, 13–22

These pins should be left unconnected or tied to VDD.

*Note: Pins can be left unconnected when not used.

Rev. 1.8

7

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