CP2110EK Silicon Laboratories Inc, CP2110EK Datasheet - Page 19

• 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

9. Voltage Regulator
The CP2110 includes an on-chip 5 to 3.45 V voltage regulator. This allows the CP2110 to be configured as either a
USB bus-powered device or a USB self-powered device. A typical connection diagram of the device in a bus-
powered application using the regulator is shown in Figure 8. When enabled, the voltage regulator output appears
on the V
characteristics. If the regulator is used to provide V
from Figure 8, but connect REGIN to an on-board 5 V supply, and disconnect it from the VBUS pin.
Connector
Note 1 : VIO can be connected directly to VDD or to a supply as low as 1.8 V to set the I/O interface
Note 2 : Avalanche transient voltage suppression diodes compatible with Full-speed USB should be
Note 3 : An external pull-up is not required, but can be added for noise immunity.
Note 4 : If programming the configuration ROM via USB, add a 4.7 F capacitor between VPP
USB
VBUS
GND
D+
DD
D-
3.45 V Power
pin and can be used to power external devices. See Table 5 for the voltage regulator electrical
voltage.
added at the connector for ESD protection. Use Littelfuse p/n SP0503BAHT or equivalent.
circuitry, and ensure that VDD is at least 3.3 V.
and ground. During a programming operation, do not connect the VPP pin to other
1-5 F
Note 2
Figure 8. Typical Bus-Powered Connection Diagram
Note 1
0.1 F
1 F
VIO
VDD
REGIN
GND
VBUS
D+
D-
DD
Rev. 1.0
in a self-powered application, use the same connections
CP2110
GPIO.3_RS485
GPIO.1_RTS
GPIO.2_CTS
GPIO.5_RXT
GPIO.0_CLK
GPIO.4_TXT
SUSPEND
SUSPEND
GPIO.6
GPIO.7
GPIO.8
GPIO.9
RST
VPP
RX
TX
VIO
and GPIO
Suspend
Standard
Signals
Signals
4.7 F
UART
Note 3
Note 4
4.7 k
CP2110
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