Transcript UART Converter Cable

FTDI FT232R vs.
USB Serial CY7C65213
USB - UART Converter Cable
USB to UART Conversion at Low Power
Owner : SAYD
Cypress Confidential
Sales Training 2/21/2013
1
FT232R Overview
FT232R is a USB to UART interface with
Data transfer rates of 3Mbaud at TTL levels
Operating supply current in normal node of 15mA
Operating supply current in suspend mode of 70µA
UART interface support for 7-8 bits and 1-2 stop bits
128 bytes RX buffer and 256 bytes TX buffer
Operating voltages from 3.3V to 5.5V
Fully integrated 1Kb EEPROM to store device descriptors and CBUS I/O configuration
FT232R finds application in
USB to UART(RS232,RS422,RS485) converters
USB upgradation of legacy peripherals
PDA (Personal Digital Assistant) to USB data transfer
USB smart card readers
FT232R
FTDI FT232R is one of the most widely used solutions for USB to UART
conversion for the last decade
Owner : SAYD
Cypress Confidential
Sales Training 2/21/2012
2
Challenges Using FTDI FT232R
1. Low FIFO receive (RX) buffer memory leads to unreliable data transfer
Transmission rates of a CPU is higher than the receiving rate of the device , hence the device needs RX buffers
High transmission rates require RX buffers of high memory size to prevent loss of data
FT232R has a low RX buffer size of only 128 bytes
USB to UART converter
cables
2. High suspend current leads to high power consumption
USB to UART cable remains in suspend mode when not transferring data
Suspend mode current should be as low as possible to save power
FT232R has a high suspend mode current of 70µA
A USB to DB9 serial converter
cable has low suspend current
requirements
CY7C65213 solves these problems
RX buffer of 256 bytes allows for high data transfer rates with minimal data loss
Industry’s lowest suspend mode current of 5µA consumes the least power
CY7C65213 is a reliable, low power solution for USB to UART converters
Owner : SAYD
Cypress Confidential
Sales Training 2/21/2012
3
FT232R vs. CY7C65213
Feature
FT232R
CY7C65213
Data Transfer Rates (baud)
300 to 3M
183 to 3M
FIFO RX/TX Buffer (bytes)
128/256
256/256
Supply Current (mA)
15
20
Suspend Current (µA)
70
5
4V-5.25V
3.15V-5.5V
Internal Oscillator (MHz)
12
0.32, 48
Flow Control (RTS/CTS)
Yes
Yes
Battery Charge Detect
No
Yes
8
8
32QFN, 28TSSOP
32QFN*
Operating Supply Voltage VCC (min, max )
GPIO Pins
Device Package
The indicated parameters are in the perceived order of importance
(*) Cypress offers CY7C64225, a 28 TSSOP USB to UART converter
Owner : SAYD
Cypress Confidential
Sales Training 2/21/2012
4
Customer Objections to Adopting
CY7C65213 over FT232R
“We are used to designing with FTDI’s FT232R”
CY7C65213 is pin compatible with FT232R
Cypress can offer price competitive solutions
Cypress offers enhanced versions of USB-Serial products with Battery Charge Detect and CapSense features
Owner : SAYD
Cypress Confidential
Sales Training 2/21/2012
5
CY7C65213 Design Win ExampleUSB to UART Converter Cable
Block Diagram
CY7C65213 Value
Design Challenges
Minimize power consumption
Minimize data loss during high speed transmission
Cypress USB to UART One-Chip Solution
48 MHz
Osc
Reset
CY Solution
Industry’s lowest suspend current of 5µA offers low power
consumption
RX and TX buffers of 256 bytes each minimize data loss
Voltage
Regulator
USB
Controller
UART
UART
Device
32 KHz
Osc
CPU and
Memory
General
Purpose
I/Os
Suggested Collateral
Datasheet: CY7C65213 (Q2 2013)
Reference Design Kits: CYUSBS232 ( Q2 2013)
Development Kits: CYUSBS234, CYUSBS236 (Q2 2013)
USB to UART RS232
converter cable
Competition
Convert DB9 UART RS232
to USB 2.0 Serial
FTDI FT232R
Silabs CP2101
Microchip MCP2200
Owner : SAYD
Cypress Confidential
Sales Training 2/21/2012
6