Freescale Semiconductor
Data Sheet: Advance Information
Document Number: USB2SERDS
Rev. 0, 05/2011
USB2SER
24-pin QFN
Case 1897
USB2SER Data Sheet
USB to UART Application Specific
IC
Introduction
The USB2SER is a USB to UART bridge controller on a
5 x 5 mm lead free QFN24. It is a simple low cost solution to
enable a USB for an embedded system with a UART port,
reducing external component counts. It supports USB 2.0 fullspeed and TTL RS232 or RS485 UART with options for
hardware flow control, Software Flow control (Xon-Xoff),
even or odd parity, and stop bits configuration.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Single chip USB to UART Data Transfer (RS232 or
RS485)
USB specification 2.0 compliant, full speed
(12 Mbps)
User programmable custom baud rates from 300 bps
to 115200 bps
UART supports 8 bit data, 1 or 2 stop bits and odd,
even or no parity
RESUME signal to request a remote wake-up and
SUSPEND output to indicate that the device is in
suspended mode
Integrated 3.3 V regulator for a USB IO
Integrated Power-On-Reset circuit
Integrated 2 MHz – 48 Mhz clock multiplier PLL
Supports 2 MHz, 4 MHz, 6 MHz, 8 MHz, 12 MHz,
and 16 MHz external crystals with automatic crystal
frequency detection
USB bulk data transfer modes for data
communication
3 V to 5 V single supply operation
UHCI / OHCI / EHCI host controller compatible
•
•
•
Hardware flow control (RTC / CTS) or Software
Xon/Xoff flow control
RS485_TXEN signal to support RS485
USB and UART activity pins to indicate
communication activity and fail sequences
Drivers support
The USB2SER can act as a CDC standard device that
eliminates the need for custom drivers for operation when the
flow-control is not needed (only an INF file is required).
For flow control support, COM emulator drivers are available
for:
•
•
•
•
Windows XP 32-bits and 64-bits versions
Windows Vista 32-bits and 64-bits versions
Windows 7 32-bits and 64-bits versions
Linux Kernel 2.6.34 and higher
Additionally to the drivers, a software configuration tool is
provided to customize the Product ID, Vendor ID, Product
strings, current consumption parameters and password
protection option, to prevent further modifications to the
device information. For driver installation and software go to:
The GUI and Driver Installer at www.freescale.com/usb2ser.
Package
USB2SER comes in a compact 5 x 5 mm Pb free RoHS
compliant QFN24.
Configurable USB VID, PID, and device
description strings in the internal flash
Configurable password to protect the device from
additional parameter modifications
Data formats supported 8 bits data, 1 and 2 stop bits
Parity odd, even, no parity
This document contains information on a product under development. Freescale reserves the
right to change or discontinue this product without notice.
© Freescale Semiconductor, Inc., 2011. All rights reserved.
USB Compliant Device
USB2SER is fully compliant with the USB 2.0 specification and has been given the USB-IF Test-ID 10006196
USB2SER Data Sheet, Rev. 0
2
Freescale Semiconductor
Contents
USB2SER
Introduction.................................................................................................................... 1
Features..................................................................................................................... 1
Drivers Support......................................................................................................... 2
Package ..................................................................................................................... 2
USB Compliant Device............................................................................................ 2
Pins and Connections.................................................................................................. 4
Block Diagram .......................................................................................................... 4
Device Pin Out.......................................................................................................... 5
Recommended System Connections.................................................................... 5
Signals Description .................................................................................................. 6
Power (VDD, VSS, VSSOSC, VUSB33)...................................................................... 7
Reset and System Initialization.............................................................................. 7
VID and PID configuration ...................................................................................... 8
Functional Description ................................................................................................. 8
Crystal Frequency Auto-detection ......................................................................... 8
Operating errors ....................................................................................................... 9
RS232 Connections ................................................................................................. 9
UART Baud rates ..................................................................................................... 9
Flow Control Operation ......................................................................................... 11
Operation with commercial terminals for serial communication ..................... 11
Drivers and GUI.......................................................................................................... 10
Graphical User Interface for Product Configuration.......................................... 11
Windows Driver ...................................................................................................... 14
Linux Driver ............................................................................................................. 14
Appendix A - Electrical Characteristics................................................................... 17
Parameter Classification ....................................................................................... 17
Absolute Maximum Ratings.................................................................................. 17
Thermal Characteristics ........................................................................................ 18
Electrostatic Discharge (ESD) Protection Characteristics ..................................20
DC Characteristics ................................................................................................. 20
Supply Current Characteristics ............................................................................ 21
Appendix B - Package information .......................................................................... 21
Appendix C – INF File ...................................................................................................
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
3
Pins and Connections
1
Pins and Connections
1.1
Block diagram
Reset
Suspend
Resume
System Control
Reset
Power Management
USB
Module
Endpoint
RAM
Full Speed
USB
Transceiver
USBDP
USBDN
User Flash
512 Bytes
EXTAL
XTAL
VDD
VSS
VUSB33
Clock Generator
Module
System Voltage
Regulator
USB 3.3 Voltage
Regulator
USB2SER
Engine
UART RX
RAM
UART TX
RAM
TXD
UART /
RS485
RXD
RTS
CTS
RS485 CTL
Figure 1. Device block diagram
1.2
Device pin out
Figure 2. USB2SER — 24-QFN Package
USB2SER Data Sheet, Rev. 0
4
Freescale Semiconductor
Pins and Connections
1.3
Recommended system connections
Figure 3. System connections working at 5 V
Figure 4. System connections working at 3 V
1
RC filter on RESET is recommended for EMC-sensitive applications.
2 RPUDP is shown for full-speed USB only. The diagram shows a configuration where the on-chip regulator and RPUDP are enabled. The voltage
regulator output is used for RPUDP. RPUDP can optionally be disabled if using an external pullup resistor on USBDP.
3 VBUS is a 5.0 V supply from upstream port that can be used for USB operation.
4 USBDP and USBDN are powered by the 3.3 V regulator.
5
When using internal VUSB33 as supply, there needs to be an external cap.
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
5
Pins and Connections
1.4
Signals description
Table 1. Signal descriptions
Pin Number
1.5
Pin Name
Description
1
/RESUME
Pin to request a remote wake-up
2
/RESET
Reset pin
3
/SUSPEND
Indicates when the device is in suspended mode
4
NC
No connect
5
USB_LED
USB activity LED connection
6
NC
No connect
7
UART_LED
UART Activity LED connection
8
RS485_TXEN
Transmitter control pin for RS485 transceiver
9
RTS
UART request to send
10
CTS
UART clear to send
11
VDD
Supply voltage
12
NC
No connect
13
VSS
0 V ground input
14
USBDN
USB data minus signal
15
USBDP
USB data plus signal
16
VUSB33
Bidirectional signal connected to the 3.3 V regulator
17
VUSB33MON
USB Internal regulator monitor pin. Connect to VUSB33
18
NC
No connect
19
RXD
UART reception pin
20
TXD
UART transmission pin
21
XTAL
XTAL crystal oscillator pin for Pierce oscillator
22
EXTAL
EXTAL crystal oscillator pin for Pierce oscillator
23
VSS_OSC
0 V ground input for the oscillator reference
24
NC
No connect
Power (VDD, VSS, VSSOSC, VUSB33)
The VDD and VSS are the primary power supply pins for the USB2SER. This voltage source supplies power to all the I/O buffer
circuitry and to an internal voltage regulator.
Typically, application systems have two separate capacitors across the power pins. A 10 µF tantalum capacitor which provides
bulk charge storage for the overall system and a 0.1 µF ceramic bypass capacitor to suppress high-frequency noise is located as
near as possible to the paired VDD and VSS power pins. The USB2SER has a VSSOSC pin. This pin must be connected to the
system ground plane or to the primary VSS pin through a low-impedance connection.
If using an external 3.3 V regulator as an input to VUSB33, the supply voltage, VDD, must not fall below the input voltage at
the VUSB33 pin. If using the internal 3.3 V regulator, do not connect an external supply to the VUSB33 pin. In this case, VDD
must fall between 3.9 V and 5.0 V for the internal 3.3 V regulator to operate correctly. The USB2SER uses the VUSB33MON
pin to detect VDD used and configure the device accordingly.
USB2SER Data Sheet, Rev. 0
6
Freescale Semiconductor
Pins and Connections
1.6
Reset and system initialization
The USB2SER has three reset sources:
•
•
•
Power-on Reset (POR)
External Reset Pin (RESET)
Software update Reset (Soft Reset)
System startup from any reset source starts with the crystal frequency auto-detection that takes 48 ms. After this step, the device
initializes the internal PLL to setup the internal clock to 48 MHz which will be used as the reference for the USB and UART to
work properly.
After reset from a source different than a POR, the VUSB33MON is configured to discharge the capacitors connected
to the VUSB33 voltage when working from a 5V power supply; this adds a 40msec delay to the system startup to
determine if the internal voltage regulator has to be enabled.
RESET
Is Reset a POR
Wait for
VUSB33
Capacitors
discharge
550ms
Crystal
Autodetection
PLL Init
System Init
48msec
System
Ready
Figure 5. Clock and system initialization
1.7
VID and PID configuration
The USB2SER includes the functionality to modify the VID, PID, Product Description Strings and Power Descriptor Value.
The default parameters are:
•
•
•
•
•
•
VID — 15A2 Hex
PID — 005A Hex
Power Descriptor Value for 100 mA
Manufacturer string — FREESCALE SEMICONDUCTOR INC.
Product string — USB TO SERIAL
Serial number string — Version 1.0
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
7
Functional Description
Each USB peripheral requires a unique VID/PID combination. Vendor IDs are assigned by the USB-IF. It is possible to us the
factory VID/PID combination, only if the Product strings are not modified. In case that the strings are changed, it is necessary
to get a different VID/PID combination.
Freescale, as a member of the USB-IF, owns a Vendor ID and manages a database of Product IDs to be used in association with
the VID. If a customer of Freescale’s USB-enabled products is unable to procure their own VID, apply to use Freescale’s VID
in association with an assigned PID.
In case the device loses power in the middle of a descriptors configuration process, the default parameters will be loaded to
ensure that the part remains functional in all cases. If this happens, the password to protect the device from further modifications
will also be reset to the default value which is “FFFFFFFFFFFFFFFF”
2
Functional Description
The USB2SER is a USB2.0 Full Speed (12Mb/s) to the UART (RS232 or RS485) converter. This device integrates an on-chip
Full Speed USB 2.0 compatible transceiver, the USB serial interface engine, and an on-chip 3.3 V voltage regulator to a UART
communication.
2.1
Crystal frequency auto-detection
The USB2SER supports 2MHz, 4MHz, 6MHz, 8MHz, 12MH, and 16MHz external crystals connected in a Pierce Oscillator
Configuration.
Figure 6. Pierce Oscillator
2.2
Operating errors
In case there is an error with the USB2SER, the device will generate a 2-bit gray sequence using the UART_LED and
USB_LED. The following are the possible errors and the device expected behavior:
•
•
2.3
For a PLL issue (crystal outside the operating range) the gray sequence changes every 60 ms
For a USB issue the sequence changes every 200 ms
RS232 connections
Figure shows the recommended connections to an RS232 transceiver. When interfacing to an RS485 transceiver, the
RS485_TXEN controls the transmitter enable signal.
USB2SER Data Sheet, Rev. 0
8
Freescale Semiconductor
Functional Description
Figure 7. Example schematic using an RS232 transceiver
2.4
UART Baud rates
Baud rate is calculated by generating an internal divisor used to generate the clock for the UART communication module. The
following calculation is used to estimate the real baud rate that will be generated by the device:
24 000 000
BaudRate = --------------------------------------------------------------------------------------------24 000 000
Round --------------------------------------------------------- 16
DesiredBaudrate 16
Where
24 000 000
Round = --------------------------------------------------------------24 000 000
--------------------------------------------------------
DesiredBaudrate 16
is the closest integer resulting from the division.
After reset the device is automatically configured to communicate at 115,200 bps which is the maximum allowed value.
2.5
Flow control operation
The device works as a standard Communication Device Class (CDC); to add flow control options to this class, the drivers are
installed in the operating system to enable this functionality.
When working without any flow control option, it is possible to generate an overflow condition, if the USB host does not request
for the data received through the serial interface fast enough. Using any flow control option (hardware or software) eliminates
the overflow possibility.
The following formula may be used to determine the amount of time without requesting data to generate the overflow condition:
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
9
Drivers and GUI
Overflow _ Timeout
BitsPerByte
* 96
BaudRate
Where:
BitsPerByte — 11 for 2 stop bits or any parity option or 10 for 1 stop bit without parity
96 is the Serial buffer size in Bytes
In case the USB host does not request for data before the time out expires and there is no flow control option selected, previously
received data will be overwritten with the new received information.
2.6
Operation with commercial terminals for serial communication
Standard terminals for UART communication may have some limitations in the type of data that may be sent/received or some
protocol supports.
Known limitations are:
•
•
Binary option must be supported to communicate data that is not standard text
Communication Protocols (that is, Z modem with Crash recovery, X modem, Y modem, Kermit, and so on) may
include a protocol timeout that may not work in baud rates below 2400 bps
When using a standard terminal (HyperTerminal or TeraTerm for example) you must, make sure that the proper configuration
is selected to send the desired type of information.
3
Drivers and GUI
The USB2SER can work with the standard Windows driver or with a custom driver for expanded functionality. The Microsoft
Windows driver will enable a USB to COM port communication but without Hardware or Software Flow control features from
the Host PC to the device. To use this approach, it is possible to copy contents from Appendix C and save it as a file with
extension .inf. When the driver is requested the first time after connecting the device it is possible to select this INF file.
Freescale custom drivers for communication allow using any standard terminal or customer software to enable or disable
Hardware or Software flow control. The driver also comes with a set of functions to configure Maximum Current consumption
through the USB port, Product Strings, Vendor ID and Product ID. Password protects these settings. If any of the product strings
or VID/PID is changed, it is necessary to send the product for USB certification if the customer wants to use the USB logo.
3.1
Graphical user interface for product configuration
The GUI provided with the USB2SER is intended to allow the modification of the Bus Power configuration, Vendor ID, Product
ID and any of the manufacturer strings. This allows the customization of any product using this product. It is also possible to
password protect the device configuration to avoid future modifications after a product release.
USB2SER Data Sheet, Rev. 0
10
Freescale Semiconductor
Drivers and GUI
To configure any or all these settings, once the GUI is open, select the right COM port for the USB2SER.
To Read the configuration of the USB2SER write the correct password on the current password field and click on the Read
button (The Password must be 16 characters long, values allowed are 0–9 and A–F, default password is
“FFFFFFFFFFFFFFFF”)
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
11
Drivers and GUI
You should now be able to see the configuration of the USB2SER:
To change any or several parameters from current list, change the desired values and click the Change button.
•
•
•
•
•
For Maximum Current Consumption you can use a value between 20 and 500 and for definition of USB.org, this field
only supports even values, value of 0 will cause to change the selection to Self Powered.
For Vendor ID and Product ID values allowed are 0–9 and A–F
For Manufacturer String, Product String and Serial Number Strings, any printable ASCII character is valid
All the fields must have valid information to change the configuration of the USB2SER Bridge
In case you need to change the current password, you will be able to by writing the new password in the New Password
field, then click on the Change button to finish this step.
USB2SER Data Sheet, Rev. 0
12
Freescale Semiconductor
Drivers and GUI
•
3.2
Click the Read button with the new password in the Current Password field to confirm that USB2SER bridge setting
has been updated according to the previous step.
Windows driver
Windows driver comes with a product installer. To install it:
Download the latest installer version from www.freescale.com/usb2ser.
To install, double-click on the installation file. A startup window appears.
On the opening window, follow the on-screen instructions
Additional documentation is available for driver usage when developing custom applications in Windows.
3.3
Linux driver
To install the Linux driver follow these simple steps:
1.
2.
3.
4.
Unpack the .tar file downloaded
In the folder containing the un packed files, check for these four files:
— cdc-freescale.c
— cdc-freescale.h
— Makefile
— Install.sh
Open a console and move to the previously mentioned folder.
— Change current user to root.
– $ sudo su
– [sudo] password for user:
Execute Install script passing as a parameter the name of the host distribution (all lower case).
— Ubuntu
– # ./Install.sh ubuntu
— Fedora
– # ./Install.sh fedora
— Red Hat
– # ./Install.sh redhat
To uninstall
1.
2.
Move to CDC driver location.
— # cd /lib/modules/$(uname -r)/kernel/drivers/usb/class/
Check for backup file.
— # ls
— cdc-acm2011.01.27-11.55.54.ko cdc-acm.ko cdc-wdm.ko usblp.ko usbtmc.ko
NOTE
The backup name varies because it is created at install time merging the original file name
plus the date-time. An example is shown in the upper text.
3.
4.
Erase current CDC driver.
— # rm cdc-acm.ko
Rename backup file.
— # mv cdc-acm2011.01.27-11.55.54.ko cdc-acm.ko
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
13
Electrical Characteristics
Appendix A Electrical Characteristics
This chapter contains electrical and timing specifications.
A.1
Parameter Classification
The electrical parameters shown in this supplement are guaranteed by various methods. To give the customer a better
understanding, the following classification is used and the parameters are tagged accordingly in the tables where appropriate:
Table A-1. Parameter classifications
P Those parameters are guaranteed during production testing on each individual device.
C
Those parameters are achieved by the design characterization by measuring a statistically
relevant sample size across process variations.
Those parameters are achieved by design characterization on a small sample size from
T typical devices under typical conditions unless otherwise noted. All values shown in the
typical column are within this category.
D Those parameters are derived mainly from simulations.
NOTE
The above classifications are used in the column labeled C in applicable tables of this data
sheet.
A.2
Absolute Maximum Ratings
Absolute maximum ratings are only stress ratings. Functional operation at maximum is not guaranteed. Stress beyond the limits
specified in Table A-2 may affect the device reliability or cause permanent damage to the device. For functional operating
conditions, refer to the remaining tables in this section.
This device contains circuitry protecting against damage due to high static voltage or electrical fields. However, it is advised
that normal precautions be taken to avoid application of any voltages higher than the maximum-rated voltages to this highimpedance circuit. Reliability of operation is enhanced if unused inputs are tied to an appropriate logic voltage level (for
instance, either VSS or VDD).
Table A-2. Absolute maximum ratings
Rating
Symbol
Value
Unit
Supply voltage
VDD
2.7 to 5.5
V
Input voltage
Vin
–0.3 to VDD + 0.3
V
± 25
mA
Instantaneous maximum current Single pin ID
limit (applies to all port pins)1, 2, 3
Maximum current into VDD
IDD 120
mA
Storage temperature
Tstg
–55 to 150 ｰ
C
Maximum junction temperature
TJ
150 ｰ
C
1. Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate
resistance values for positive (VDD) and negative (VSS) clamp voltages, then use the larger of the two resistance values.
2. All functional non-supply pins are internally clamped to VSS and VDD.
USB2SER Data Sheet, Rev. 0
14
Freescale Semiconductor
Electrical Characteristics
3. Power supply must maintain regulation within operating VDD range during instantaneous and operating maximum current
conditions. If positive injection current (VIn > VDD) is greater than IDD, the injection current may flow out of VDD and can result
in the external power supply going out of regulation. Ensure external VDD load will shunt current greater than maximum
injection current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is
present, or if the clock rate is very low which reduces overall power consumption.
A.3
Thermal Characteristics
This section provides information about operating temperature range, power dissipation, and package thermal resistance. Power
dissipation on I/O pins is usually small compared to the power dissipation in on-chip logic. It is user-determined rather than
being controlled by the MCU design. To take PI/O into account in power calculations, determine the difference between actual
pin voltage and VSS or VDD and multiply by the pin current for each I/O pin. Except in cases of unusually high pin current
(heavy loads), the difference between pin voltage and VSS or VDD will be very small.
Table A-3. Absolute maximum ratings
Rating
Symbol
Operating temperature range (packaged)
Value
Unit
TA
TL to TH
-40 to 85
°C
JA
92
33
° C/W
Thermal Resistance 1, 2, 3, 4
24-pin QFN
1s
2s2p
1. Junction temperature is a function of die size, on-chip power dissipation, package thermal resistance, mounting site (board)
temperature, ambient temperature, air flow, power dissipation of other components on the board, and board thermal resistance
2. Junction to Ambient Natural Convection
3. 1s — Single layer board, one signal layer
4. 2s2p — Four layer board, 2 signal and 2 power layers
The average chip-junction temperature (TJ) in × ° C can be obtained from:
Tj = TA + P
P
Iq
D JA D
JA
Eqn. 1
Where:
TA — Ambient temperature,° C
JA — Package thermal resistance, junction-to-ambient,° C/W
PD — Pint + PI/OPint = IDD × VDD, Watts — chip internal power
PI/O — Power dissipation on input and output pins — user determined
For most applications, PI/O << Pint and can be neglected. An approximate relationship between PD and TJ (if PI/O is neglected)
is:
PD = K T J + 273C
Eqn. 2
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
15
Electrical Characteristics
Solving Equation 1 and Equation 2 for K gives:
K = P D T A + 273C + JA P D
2
Eqn. 3
Where K is a constant pertaining to the particular part. K can be determined from Equation 3 by measuring PD (at equilibrium)
for a known TA. Using this value of K, the values of PD and TJ can be obtained by solving Equation 1 and Equation 2 iteratively
for any value of TA.
A.4
Electrostatic Discharge (ESD) Protection Characteristics
Although damage from static discharge is much less common on these devices than on early CMOS circuits, normal handling
precautions must be used to avoid exposure to static discharge. Qualification tests are performed to ensure that these devices
can withstand exposure to reasonable levels of static without suffering any permanent damage. This device was qualified to
AEC-Q100 Rev E. A device is considered to have failed if, after exposure to ESD pulses, the device no longer meets the device
specification requirements. Complete DC parametric and functional testing is performed per the applicable device specification
at room temperature followed by hot temperature, unless specified otherwise in the device specification.
Table A-4. ESD Protection characteristics
Rating
A.5
Symbol
Value
Unit
ESD Target for Machine Model (MM) — MM VTHMM
circuit description
200
V
ESD Target for Human Body Model (HBM) VTHHBM
— HBM circuit description
2000
V
DC Characteristics
This section includes information about power supply requirements, I/O pin characteristics, and power supply current in various
operating modes.
Table A-5. ESD Protection characteristics
Num
C
1
2
3
P
P
Parameter
Symbol
Operating voltage
—
Output high voltage
5 V, ILoad = –10 mA
3 V, ILoad = –3 mA
5 V, ILoad = –2 mA
3 V, ILoad = –0.4 mA
VOH
Min
2.7
VDD – 1.5
VDD – 1.5
VDD – 0.8
VDD – 0.8
Output low voltage — Low drive (PTxDSn = 0) VOH
5 V, ILoad = 2 mA
3 V, ILoad = 0.6 mA
5 V, ILoad = 0.4 mA
3 V, ILoad = 0.24 mA
1.5
1.5
0.8
0.8
Output low voltage — High drive (PTxDSn = 1)
5 V, ILoad = 10 mA
3 V, ILoad = 3 mA
5 V, ILoad = 2 mA
3 V, ILoad = 0.4 mA
1.5
1.5
0.8
0.8
Typical1
Max
Unit
—
5.5
V
—
—
—
—
—
—
—
—
V
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
V
USB2SER Data Sheet, Rev. 0
16
Freescale Semiconductor
Electrical Characteristics
Table A-5. ESD Protection characteristics (continued)
4
P
5
P
Output high current — Max total IOH for all ports IOHT
5V
3V
—
—
—
—
100
60
mA
Output high current — Max total IOL for all ports IOLT
5V
3V
—
—
—
—
100
60
mA
6
P
Input high voltage; all digital inputs
VIH
0.65 x VDD
—
—
7
P
Input low voltage; all digital inputs
VIL
—
—
0.35 x VDD
8
P
Input hysteresis; all digital inputs
VHYS
0.06 x VDD
—
—
Mv
| IIn |
—
.01
1
µA
| IOZ |
—
.01
1
µA
RPU
20
45
65
k
9
P
Input leakage current; input only pins
1
current1
V
10
P
High Impedance (off-state) leakage
11
P
Internal pullup resistors2 (Resume pin)
12
C Internal pullup resistor to USBDP (to VUSB33)
Idle
Transmit
RPUPD
900
1425
—
—
1575
3090
k
C Input capacitance; all non-supply pins
CIN
—
—
8
pF
13
1. Measured with VIn = VDD or VSS.
2. Measured with VIn = VSS.
A.6
Supply Current Characteristics
Table A-6. Supply current characteristics
Num
1
C
P
Parameter
Run supply current
Symbol
RIDD
VDD (V)
Typical1
Max
Unit
5
19.93
—
mA
3
18.74
—
mA
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
17
Package Information
Appendix B Package Information
USB2SER Data Sheet, Rev. 0
18
Freescale Semiconductor
Package Information
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
19
Package Information
USB2SER Data Sheet, Rev. 0
20
Freescale Semiconductor
INF File
Appendix C INF File
;-----------------------------------------------------------------------------;
Freescale Semiconductor INC.
;
Communication Device Class (CDC) INF File
;-----------------------------------------------------------------------------[Version]
Signature="$Windows NT$"
Class=Ports
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}
Provider=%MANUFACTURER%
LayoutFile=layout.inf
;CatalogFile=%FILENAME%.cat
DriverVer= 4/24/2009,1.1.2600.1
[Manufacturer]
%MANUFACTURER%=DeviceList,NTamd64
[DestinationDirs]
DefaultDestDir=12
;-----------------------------------------------------------------------------;
Windows 2000/XP/Vista32 Support
;-----------------------------------------------------------------------------[DriverInstall.nt]
include=mdmcpq.inf
CopyFiles=DriverCopyFiles.nt
AddReg=DriverInstall.nt.AddReg
[DriverCopyFiles.nt]
usbser.sys,,,0x20
[DriverInstall.nt.AddReg]
HKR,,DevLoader,,*ntkern
HKR,,NTMPDriver,,%DRIVERFILENAME%.sys
HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider"
[DriverInstall.nt.Services]
AddService=usbser, 0x00000002, DriverService.nt
[DriverService.nt]
DisplayName=%SERVICE%
ServiceType=1
StartType=3
ErrorControl=1
ServiceBinary=%12%\%DRIVERFILENAME%.sys
;-----------------------------------------------------------------------------;
Windows Vista64 Support
;-----------------------------------------------------------------------------[DriverInstall.NTamd64]
include=mdmcpq.inf
CopyFiles=DriverCopyFiles.NTamd64
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
21
INF File
AddReg=DriverInstall.NTamd64.AddReg
[DriverCopyFiles.NTamd64]
%DRIVERFILENAME%.sys,,,0x20
[DriverInstall.NTamd64.AddReg]
HKR,,DevLoader,,*ntkern
HKR,,NTMPDriver,,%DRIVERFILENAME%.sys
HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider"
[DriverInstall.NTamd64.Services]
AddService=usbser, 0x00000002, DriverService.NTamd64
[DriverService.NTamd64]
DisplayName=%SERVICE%
ServiceType=1
StartType=3
ErrorControl=1
ServiceBinary=%12%\%DRIVERFILENAME%.sys
;-----------------------------------------------------------------------------;
VID/PID Settings
;-----------------------------------------------------------------------------[SourceDisksFiles]
[SourceDisksNames]
[DeviceList]
%DESCRIPTION%=DriverInstall, USB\VID_15A2&PID_005A
[DeviceList.NTamd64]
%DESCRIPTION%=DriverInstall, USB\VID_15A2&PID_005A
;-----------------------------------------------------------------------------;
String Definitions
;-----------------------------------------------------------------------------[Strings]
FILENAME="FSL_cdc"
DRIVERFILENAME ="usbser"
MANUFACTURER="Freescale Semiconductor"
INSTDISK="USB2UART"
DESCRIPTION="Freescale CDC Device"
SERVICE="Virtual Com Driver"
USB2SER Data Sheet, Rev. 0
22
Freescale Semiconductor
USB2SEREVB Layout, Schematics, and BOM
Appendix D USB2SEREVB Layout, Schematics, and BOM
D.1
Board Layout
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
23
USB2SEREVB Layout, Schematics, and BOM
D.2
Shematics
USB2SER Data Sheet, Rev. 0
24
Freescale Semiconductor
USB2SEREVB Layout, Schematics, and BOM
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
25
USB2SEREVB Layout, Schematics, and BOM
USB2SER Data Sheet, Rev. 0
26
Freescale Semiconductor
USB2SEREVB Layout, Schematics, and BOM
D.3
Bill of Materials
Table 2. BOM
Quantity
Description
Reference
1
CAP CER 0.47UF 25V 10% X7R 0805
C8
2
CAP CER 1.0UF 6.3V 10% X5R 0402
C10,C12
5
CAP CER 0.1UF 10V 10% X5R 0402
C1,C2,C4,C5,C9
2
CAP CER 18PF 50V 5% C0G 0402
C3,C6
1
CAP CER 1000PF 50V 5% C0G 0402
C11
1
CAP CER 4.7uF 25V 10% X7R 1206
C7
1
CAP CER 10UF 10V 20% X5R 0603
C13
1
IND FER BEAD 60OHM@100MHZ 500MA -- 0603
L1
1
HDR 1X3 TH 100MIL SP 374H AU
J4
1
HDR 1X2 TH 100MIL SP 339H AU 98L
J3
1
CON 9 DB 0.318 PLUG RA SHLD TH 54MIL SP 494H AU W/ BRD LOCKS
J1
1
CON 2X2 USB_TYPE_B SKT RA SHLD TH 2.5MM SP 453H AU
J5
1
HDR 1X9 TH 100MIL SP 330H SN
P1
2
TEST POINT PAD 40MIL DIA SMT, NO PART TO ORDER
TP1,TP2
1
XTAL 4MHZ -- 18PF 20PPM SMT
Y1
1
IC VREG LDO 3.3V 80MA 6.0V SC82-AB
U3
1
IC USB2SERA10CFK
U2
1
IC XCVR RS232 2 DRV 2 RCV 235KBPS 3.0-5.5V TSSOP20
U1
1
LED RED/GRN DUAL 20MA SMD
DS1
1
RES MF 1.0M 1/16W 1% 0402
R1
2
RES MF 470 OHM 1/16W 5% 0402
R7,R8
1
RES MF ZERO OHM 1/16W 5% 0402
R9
1
RES MF 10K 1/16W 5% 0402
R3
2
RES MF 33.0 OHM 1/16W 1% 0402
R5,R6
1
DIODE ZNR 3W 5.1V SMB
D1
1
DIODE ESD SUPPRESSOR BIDIR -- 12V 0402
TVS1
1
SW DPDT SMT 0.4VA@20VAC/DC
SW1
1
FUSE PTC 0.5A 6V SMT
F1
0
RES MF 10K 1/16W 5% 0402
R2
USB2SER Data Sheet, Rev. 0
Freescale Semiconductor
27
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© Freescale Semiconductor, Inc. 2011. All rights reserved.
USB2SERDS
Rev. 0
05/2011