CP2110EK Silicon Laboratories Inc, CP2110EK Datasheet - Page 17

• Manufacturer Part Number: CP2110EK
• Description: KIT EVAL FOR CP2110
• Manufacturer: Silicon Laboratories Inc

Specifications of CP2110EK

• Main Purpose: Interface, USB 2.0 to UART (RS485) Bridge
• Embedded: No
• Utilized Ic / Part: CP2110
• Primary Attributes: Full Speed (12Mbps)
• Secondary Attributes: LED Status Indicators
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3.3 V
• Product: Interface Development Tools
• For Use With/related Products: CP2110
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 336-2003

7.3. GPIO.3—RS-485 Transceiver Bus Control
GPIO.3 is configurable as an RS-485 bus transceiver control pin that is connected to the DE and RE inputs of the
transceiver. When configured for RS-485 mode, the pin is asserted during UART data transmission as well as line
break transmission. The RS-485 mode of GPIO.3 is active-high by default, but is also configurable for active-low
mode.
7.4. GPIO.4-5—Transmit and Receive Toggle
GPIO.4 and GPIO.5 are configurable as Transmit Toggle and Receive Toggle pins. These pins are logic high when
a device is not transmitting or receiving data, and they toggle at a fixed rate as specified in Table 6 when data
transfer is in progress. Typically, these pins are connected to two LEDs to indicate data transfer.
More information regarding the configuration and usage of these pins can be found in Section 8 as well as “AN144:
CP21xx Customization Guide” available on the Silicon Labs web site.
Figure 7. Transmit and Receive Toggle Typical Connection Diagram
GPIO.3 – RS485
CP2110
Figure 6. RS-485 Transceiver Typical Connection Diagram
GPIO.5 – RX Toggle
GPIO.4 – TX Toggle
CP2110
RX
TX
Rev. 1.0
R
D
RE
DE
VIO
Transceiver
RS485
CP2110
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