FINTEK F81232 Usb to uart chip Datasheet

F81232
F81232
USB to UART Chip
Release Date: August, 2008
Version: V0.10P
F81232
.
Aug., 2008
V0.10P
F81232
F81232 Datasheet Revision History
Version
Date
V0.10P
2008/8/25
Page
-
Revision History
Preliminary Version
Please note that all data and specifications are subject to change without notice. All the trade marks of products
and companies mentioned in this data sheet belong to their respective owners.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Fintek for any damages resulting from
such improper use or sales.
F81232
.
Aug., 2008
V0.10P
F81232
Table of Content
1. General Description.................................................................................................................................1
2. Feature List..............................................................................................................................................1
3. Pin Configuration ....................................................................................................................................2
4. Pin Description........................................................................................................................................2
6. Electrical Characteristics Request ...........................................................................................................8
7. Ordering Information ............................................................................................................................10
8. Package Dimensions .............................................................................................................................11
9. Application Circuit. ...............................................................................................................................12
F81232
.
Aug., 2008
V0.10P
F81232
1. General Description
The F81232 is a highly-integrated USB to UART bridge controller providing a simple
solution for updating RS-232 design to USB using a minimum of components. A programmable
generator is provided to select baud rate from 1200 to 115.2kbps.
In USB interface function, The F81232 communications with host by full-speed USB
interface (12Mb/s). It supports 4 suits endpoint, one control endpoint( endpoint zero) is for bus
enumeration, one output endpoint is for UART transmit data and two input endpoint is transmit
UART data and status to host.
In I2C interface function, The F81232 builds 256 bytes SRAM to save from I2C flash/ROM
information for USB bus enumeration. The I2C flash/ROM contains IdVendor/ IdProduct/
BcdDevice/ Manufacturer string / IProduct string / iSerialNumber string information.
In power function, The F81232 supports remote-wakeup function for USB interface, when
PC system into S3 state. The F81232 receive UART data to asserted USB interface to wakeup
PC system.
2. Feature List
Full compliance with the USB specification Rev 1.1.
Support RS-232 serial interface.
Install as a standard COM port.
Support baud rate from 1200 to 115.2kbps.
Support remote-wakeup and power management
Single chip USB to serial communication.
Power by 3.3V and package in 16SSOP.
F81232.
Aug., 2008
V0.10P
F81232
3. Pin Configuration
4. Pin Description
OD12_5v
- Open-drain output pin with 12 mA sink 5v tolerance capability.
IOD12st_5v - TTL level bi-directional pin with schmitt trigger and with 12 mA sink 5v tolerance capability.
O12
- output pin with 12 mA driving/sink capability.
INst_5v
- TTL level input pin with schmitt trigger 5v tolerance.
INt
- TTL level input pin.
AIO
- USB PAD compatible USB 1.1 spec( internal resistor 28ohm~44ohm)
AIO1.5k
- USB PAD compatible USB 1.1 spec( internal resistor 28ohm~44ohm),and internal pull high 1.5kohm
P
- Power.
F81232.
Aug., 2008
V0.10P
F81232
Pin No
1
Pin Name
D+
Type
PWR
Description
AIO1.5k
VDD
D+, different data bus conforming to USB standard. internal pull
high 1.5k
2
D-
AIO
VDD
D-, different data bus conforming to USB standard.
3
XTALIN/48M
INt
VDD
12MHz/48Mhz clock input.
4
XTALOUT
O12
VDD
12 MHz clock output.
5
SCL
OD12_4.7k
VDD
I2C serial clock internal pull high 4.7k
6
SDA
OD12_4.7k
VDD
I2C serial data internal pull high 4.7k
7
RTS#
O12
VDD
Serial port (request to send)
8
GND
P
GND
GND
9
DTR#
I/O12st_5v
VDD
Serial port(data terminal ready)
10
TXD
O12
VDD
Serial port(transmitted data )
11
RXD
INts_5V
VDD
Serial port(received data)
12
CTS#
INts_5V
VDD
Serial port(clear to send)
13
DSR#
INts_5V
VDD
Serial port(data set ready)
14
DCD#
INts_5V
VDD
Serial port(data carrier detect)
15
RI#
INts_5V
VDD
Serial port(ring indicator)
16
VDD
P
VDD
Power supply input 3.3v
5. Functional Description
5.1 USB function
The F81232 communications with host by full-speed USB interface (12Mb/s). It supports 4 suits endpoint, one control
endpoint( endpoint zero) is for bus enumeration, one output endpoint is for UART transmit data and two input endpoint is
transmit UART data and status to host.
Endpoint zero is special significance in USB system. It is a control endpoint, and is required by every device. Only control
endpoint accept special setup token that the host transfer command to device.
During enumeration, host requests GET_DESCRIPTOR to device and device return information (over in endpoint zero) as
what device driver top load. The F81232 get descriptor information from I2C flash/ROM, the F81232 returns default description
to Host. If I2C flash/ROM does not connect with F81232, the below table is about F81232 default descriptor.
offset
0
F81232.
Field
BLength
size
1
Value
0x12
Aug., 2008
V0.10P
F81232
1
2
4
5
6
7
8
10
12
14
15
16
17
bDescriptor Type
BcdUSB
bDeviceClass
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize
IdVendor
IdProduct
BcdDevice
Manufacturer
IProduct
iSerialNumber
bNumConfiguration
1
2
1
1
1
1
2
2
2
1
1
1
1
0x01
0x0101
0x00
0x00
0x00
0x10
0x1934
0x0706
0x0001
0x01
0x02
0x03
0x01
Table 5-1 Device Descriptor
offset
0
1
2
4
5
6
7
8
Field
BLength
bDescriptor Type
wTotalLength
bNumInterface
bConfigurationValue
iConfiguration
BmAttributes
MaxPower
size
1
1
2
1
1
1
1
1
Value
0x09
0x02
0x0027
0x01
0x01
0x00
0xa0
0x32
Table 5-2 Configuration Descriptor
offset
0
1
2
3
4
5
6
7
8
Field
BLength
bDescriptor Type
wInterfaceNumber
bAlternateSetting
bNumEndpoints
bInterfaceClass
bInterfaceSubClass
bInterfaceProtocol
IInterface
size
1
1
1
1
1
1
1
1
1
Value
0x09
0x04
0x00
0x00
0x03
0x00
0x00
0x00
0x00
Table 5-3 Interface Descriptor
offset
0
1
2
3
4
6
Field
BLength
bDescriptor Type
bEndpointAddress
BmAttributes
wMaxPacketSize
BInterval
size
1
1
1
1
2
1
Value
0x07
0x05
0x81
0x03
0x0010
0x0a
Table 5-4 In Endpoint Descriptor
offset
0
1
F81232.
Field
BLength
bDescriptor Type
size
1
1
Value
0x07
0x05
Aug., 2008
V0.10P
F81232
2
3
4
6
bEndpointAddress
BmAttributes
wMaxPacketSize
BInterval
1
1
2
1
0x82
0x02
0x0010
0x00
Table 5-5 In Endpoint Descriptor
offset
0
1
2
3
4
6
Field
BLength
bDescriptor Type
bEndpointAddress
BmAttributes
wMaxPacketSize
BInterval
size
1
1
1
1
2
1
Value
0x07
0x05
0x01
0x02
0x0010
0x00
Table 5-6 Out Endpoint Descriptor
The string table 1 is about manufacturer information, its contents are “FINTEK”, the string table 2 is about Product
information, its contents is “USB to UART Bridge. The string table 3 is about serial number information, its contents is
“88635600168801”.
In power function, The F81232 supports remote-wakeup function for USB interface, when PC system into S3 state. The
F81232 receive any UART data and ring. The F81232 is asserted USB interface to wakeup PC system.
5.2 UART function
The F81232 provides 1 suit UART through USB interface. UART includes 16-bytes send/ 64 bytes receive FIFO,
a programmable baud rate generator, complete modem control capability and an interrupt system.
.
5.3 Wakeup function
The F81232 Supports wakeup system function, The F81232 detect idle state on USB bus for more than 3.0ms, it is into
suspend state. In Suspend state, the F81232 receive any UART data and ring. It asserted USB interface.
F81232.
Aug., 2008
V0.10P
F81232
D+
D3ms
15ms
Suspend state
Uart data
wakeup
Figure 5-1 USB remote wakeup
D+
D3ms
15ms
Suspend state
Uart data
wakeup
Figure 5-2 USB remote wakeup
F81232.
Aug., 2008
V0.10P
F81232
5.4 I2C interface function
The F81232 Supports 1 suit I2C interface to get USB description information and builds 256 bytes RAM to save vendor
USB description information. When power is ready, I2C function start to load USB description into 256 bytes RAM, and
expect host requests GET_DESCRIPTOR to F81232 which returns vendor USB description, if i2c flash/ROM connect with
F81232. The contents of I2C flash /ROM format is below table.
0x0
Security code
0x55
0x1
Security code
0xaa
0x2
IdVendor length
0x02
0x3
IdVendor low byte
IdVendor low byte
0x4
IdVendor low byte
IdVendor high byte
0x5
IdProduct length
0x02
0x6
IdProduct low byte
IdProduct low byte
0x7
IdProduct low byte
IdProduct high byte
0x8
Endpoint 1 polling time
Define by vendor content
0x9
BcdDevice length
0x02
0xa
BcdDevice low byte
BcdDevice low byte
0xb
BcdDevice high byte
BcdDevice high byte
0xc
Manufacturer string length
Define by vendor content
0xd+ Manufacturer string length
Manufacturer string content
Define by vendor content
0xd+ Manufacturer string length + 1
IProduct string length
Define by vendor content
0xd+ Manufacturer string length + IProduct string content
Define by vendor content
IProduct string length +1
0xd+ Manufacturer string length + ISerialNumber string length
Define by vendor content
IProduct string length +2
0xd+ Manufacturer string length + IProduct string length
Define by vendor content
IProduct string length +2
Table 5-7 I2C flash/ROM USB description format
F81232.
Aug., 2008
V0.10P
F81232
6. Electrical Characteristics Request
Absolute Maximum Ratings
PARAMETER
RATING
UNIT
Power Supply Voltage
-0.3 to 3
V
-0.3 to VDD+0.3
V
0 to 70
°C
-55 to 150
°C
Input Voltage
Operating Temperature
Storage Temperature
Table 6-1: Electrical characteristics table
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
DC Characteristics
(TA = 0° C to 70° C, VDD = 3.3V ± 10%, VSS = 0V )
Parameter
Supply Voltage range
Conditions
VDD
MIN
TYP
MAX
Unit
3.0
3.3
3.6
V
Table 6-2: Operating Voltage table
PARAMETER
SYM.
MIN
TYP
MAX.
UNIT
CONDITIONS
I/O12st_5v - TTL level and schmitt trigger bi-directional pin with 12 mA source-sink 5v tolerance capability(3.3V)
Input Low Voltage
VIL
Input High Voltage
VIH
0.8
2.0
Hysteresis
V
V
0.5
V
Output Low Current
IOL
12
mA
0.4V
Output high Current
IOL
12
mA
2.4V
Input High Leakage
ILIH
-1
1
µA
Input Low Leakage
ILIL
-1
1
µA
OD12_4.7k – Open-drain output pin with12mA source-sink capability(3.3V), pull high 4.7k
Output Low Current
IOL
12
mA
0.4V
O12 – Output pin with12mA source-sink capability(3.3V)
Output Low Current
IOL
12
mA
0.4V
Output HIGH Current
IOH
12
mA
2.4V
INt – TTL level input pin
F81232.
Input Low Threshold Voltage
VIL
Input Hign Threshold Voltage
VIH
0.8
2.0
V
V
Aug., 2008
V0.10P
F81232
Input High Leakage
ILIH
Input Low Leakage
ILIL
+1
µA
µA
-1
INts_5v – TTL level input pin and schmitt trigger, 5 tolerance
Input Low Threshold Voltage
VIL
Input Hign Threshold Voltage
VIH
0.8
2.0
V
Hysteresis
0.5
Input High Leakage
ILIH
Input Low Leakage
ILIL
V
V
+1
µA
µA
-1
Table 6-3: PAD DC table
USB Interface
Parameter
Symbol
Min.
Max.
Units
Rise Time
TFR
4
20
Ns
Fall Time
TFF
4
20
Ns
Differential Rise and Fall Time
TFRFM
90
111.11
%
ZDRV
28
44
Ω
Matching
Driver Output Resistance
USB AC table
USB timing
F81232.
Aug., 2008
V0.10P
F81232
USB Jitter
7. Ordering Information
F81232.
Part Number
Package Type
Production Flow
F81232R
16 pin SSOP (Green Package)
Commercial, 0°C to +70°C
Aug., 2008
V0.10P
F81232
8. Package Dimensions
16pin-SSOP (150mil)
Feature Integration Technology Inc.
Headquarters
3F-7, No 36, Tai Yuan St.,
Chupei City, Hsinchu, Taiwan 302, R.O.C.
Taipei Office
Bldg. K4, 7F, No.700, Chung Cheng Rd.,
Chungho City, Taipei, Taiwan 235, R.O.C.
TEL : 886-3-5600168
TEL : 866-2-8227-8027
FAX : 886-3-5600166
FAX : 866-2-8227-8037
www: http://www.fintek.com.tw
Please note that all datasheet and specifications are subject to change without notice. All the trade
F81232.
marks of products and companies mentioned in this datasheet belong to their respective owner
Aug., 2008
V0.10P
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