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Número de pieza

componentes Descripción

Fabricante

CP2105EK

SINGLE-CHIP USB TO UART BRIDGE

Silicon Laboratories 

CP2105

Name

CTS_SCI

SUSPEND

Pin #

18*

17*

Table 7. CP2105 Pin Definitions (Continued)

Type

D In

Description

Clear To Send control input (active low) for the Standard Comm Interface.

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_ECI

NC

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

for the Standard Comm Interface.

16*

— In GPIO mode, this pin is not used.

DCD_ECI

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

(active low) for the Enhanced Comm Interface.

VPP

GPIO.0_ECI 15*

Special

D I/O

Additionally, in either mode programming of the configuration ROM via the

USB interface can be accomplished if a 4.7 F capacitor is connected

between this pin and GND.

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

Enhanced Comm Interface.

DTR_ECI

GPIO.1_ECI 14*

D Out

D I/O

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

(active low) for the Enhanced Comm Interface.

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

Enhanced Comm Interface.

DSR_ECI

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

low) for the Enhanced Comm Interface.

TXD_ECI

13

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

face.

RXD_ECI

12

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

RTS_ECI 11* D Out Ready to Send control output (active low) for the Enhanced Comm Interface.

CTS_ECI 10*

D In Clear To Send control input (active low) for the Enhanced Comm Interface.

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

8

Rev. 1.0

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