Silicon Laboratories CP2103 User Manual
CP2103
USB to UART Bridge
Description
- The CP2103 is a highly-integrated USB-to-UART bridge controller pro-
viding a simple solution for updating RS-232 or RS-485 designs to USB
using a minimum of components and PCB space. The CP2103 is a func
tional upgrade to CP2101/2 with new features such as configurable I/O
levels (3.3 to 1.8
V) and four general purpose I/O signals for system sta-
tus and control.
It includes the standard USB 2.0 full-speed function controller, USB
transceiver, oscillator, EEPROM and asynchronous serial data bus
(UART) with full modem control signals in a compact 5 x 5
mm MLP-28
package. No other external USB components are required.
Example Applications
- Upgrade of RS-232 legacy devices to USB
- Upgrade of RS-485 legacy devices to USB
- USB to RS-232 serial adapter
Virtual Com Port Drivers
- Works with existing COM port applications
- Royalty-free distribution license
- Windows 98SE/2000/XP
- MAC OS-9
- MAC OS-X
- Linux 2.40
USBXpress™ Direct Driver Support
Supply Voltage
- Self-powered: 3.0–3.6 V
- USB bus powered: 4.0–5.25 V
Temperature Range: –40 to +85 °C
Features
USB Function Controller and Transceiver
- USB specification 2.0 compliant; full-speed (12 Mbps)
-
- Integrated 1024-byte EEPROM for custom Baud rates, vendor ID, etc.
- Integrated transceiver; no external resistors required
- Integrated clock; no external crystal required
- USB suspend states supported via SUSPEND pins
Asynchronous Serial Data Bus (UART)
- All handshaking and modem interface signals
- Data formats supported: 8, 7, 6, 5-bit; 1, 1.5, 2 Stop bits
- Parity: Odd, Even, Mark, Space, No Parity
- Baud rates: 300 bps to 1 Mbps
- 576-byte receive buffer; 640-byte transmit buffer
- Event character support; line break event support
- Four GPIO signals for status and control
- Configurable I/O (3.3 to 1.8 V V
) using VIO pin
OH
- RS-485 mode with bus transceiver control
Power-On Reset Circuit
Package
- 28-pin QFN (lead-free package)
Ordering Part Numbers
- CP2103-GM
GPIO_0
GPIO_1
GPIO_2
GPIO_3
RST
RI
DCD
DTR
DSR
TXD
RXD
RTS
CTS
1
8
1
(to external circuitry
for status and
7
1
control)
6
1
9
(to external circuitry
12
for USB suspend
states)
11
1
28
27
External RS-232
26
25
24
23
22
transceiver or
UART circuitry
External
voltage supply
or direct
connection
to VDD
USB
CONNECTOR
VBUS
D-
D+
GND
5
6
1
2
3 3
4
3
V
USB Function
Contro ller
640B
Buffer
CP2103
576B
TX
RX
Buffer
4
SUSPEND
SUSPEND
UART
5
VIO
7
REGIN
6
VDD
2
GND
8
VBUS
4
D-
D+
Voltage
IN
Regulator
OUT
USB
Transceiver
3
.
48 MHz
Oscillator
1024B
EEPROM
9
Interface Products Copyright © 2005 by Silicon Laboratories 10.27.2005
CP2103
USB to UART Bridge
Selected Electrical Specifications
(TA = –40 to +85 C°, V
Parameter Conditions Min Typ Max Units
Regulator Input Voltage (REGIN) 4.0 — 5.25 V
V
(Regulator Output) 3.0 3.3 3.6 V
DD
IDD (Regulator Output) — 75 — mA
Regulator Bias Current — 70 — µA
Supply Current (from REGIN) USB active
= 5.0 V unless otherwise specified unless otherwise specified.)
REGIN
—
USB suspend mode
—
25
310
—
—
mA
µA
Pin Number Signal Pin Number Signal
1R117GPIO.2
2 GND 18 GPIO.1
3D+19GPIO.0
4D–22CTS
5VIO23RTS
6 VDD 24 RXD
7REGIN25 TXD
8 VBUS 26 DSR
9
11
RST
SUSPEND
27 DTR
28 DCD
12 SUSPEND 10, 13–15, 20–21 No Connect
16 GPIO.3
Package Information
Bottom View
8
9
10
121314
L
7
6
b
5
4
e
3
2
1
DETAIL 1
282726
A3
11
D2
D2
2
25
6 x e
D
Side View
e
E2
2
E2
242322
A2
15
16
17
18
E
R
6 x e
19
20
21
DETAIL 1
A
A1
MM
MIN TYP MAX
0.80 0.90 1.00A
0 0.02 0.05A1
0 0.65 1.00A2
0.25A3
0.18 0.23 0.30b
5.00D
2.90 3.15 3.35D2
5.00E
2.90 3.15 3.35E2
0.5e
0.45 0.55 0.65L
28N
7ND
7NE
0.09R
0.435AA
0.435BB
0.18CC
0.18DD
AA
CC
CP2103EK Evaluation Kit—A complete HW/SW
demonstration of the CP2103 chip and associated
software drivers.
The CP2103EK shown below includes the following:
- CP2103TB circuit board with USB connector,
CP2103 chip, RS-232 transceiver, and DB-9
connector
- CD ROM with device drivers
- USB cable
- RS-232 cable
CP2103EK Evaluation Kit
BB
DD
Interface Products Copyright © 2005 by Silicon Laboratories 10.27.2005
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders
Loading...