CP2105EK View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

CP2105EK

SINGLE-CHIP USB TO UART BRIDGE

Silicon Laboratories 

CP2105

3. Pinout and Package Definitions

Name

VDD

VIO

GND

RST

REGIN

VBUS

D+

D–

SUSPEND

Table 7. CP2105 Pin Definitions

Pin # Type

6 Power In Power Supply Voltage Input.

Description

Power Out Voltage Regulator Output. See Section 10.

5 Power In I/O Supply Voltage Input.

2

Ground. Must be tied to ground.

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 the time specified

in Table 4.

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

8

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

USB network.

3

D I/O USB D+

4

D I/O USB D–

1*

D Out In GPIO mode, this pin indicates whether the device is in the USB Suspend or

not. The polarity can be configured via the configuration PROM, and defaults

to active-low.

RI_SCI

GPIO.0_SCI 24*

D In

D I/O

In modem control mode, this pin is the Ring Indicator control input (active low)

for the Standard Comm Interface.

In GPIO mode, this pin is a user-configurable input or output for the Standard

Comm Interface.

DCD_SCI

GPIO.1_SCI 23*

D In

D I/O

In modem control mode, this pin is the Data Carrier Detect control input

(active low) for the Standard Comm Interface.

In GPIO mode, this pin is a user-configurable input or output for the Standard

Comm Interface.

DTR_SCI

GPIO.2_SCI 22*

D Out

D I/O

In modem control mode, this pin is the Data Terminal Ready control output

(active low) for the Standard Comm Interface.

In GPIO mode, this pin is a user-configurable input or output for the Standard

Comm Interface.

DSR_SCI

D in In modem control mode, this pin is the Data Set Ready control input (active

low) for the Standard Comm Interface.

TXD_SCI

21

D Out Asynchronous data output (UART Transmit) for the Standard Comm Inter-

face.

RXD_SCI

20

D In Asynchronous data input (UART Receive) for the Standard Comm Interface.

RTS_SCI 19* D Out Ready to Send control output (active low) for the Standard Comm Interface.

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

Rev. 1.0

7

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