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參數(shù)資料
| 型號： | USB-SPI-SS |
| 廠商： | Flexipanel |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC USB SYNC SRL SPI 20-SSOP |
| 標準包裝： | 25 |
| 應(yīng)用： | USB 主機/外圍設(shè)備控制器 |
| 接口： | SPI 串行 |
| 電源電壓： | 1.8 V ~ 5 V |
| 封裝/外殼： | 20-SSOP |
| 供應(yīng)商設(shè)備封裝： | 20-SSOP |
| 包裝： | 散裝 |
| 安裝類型： | 表面貼裝 |
| 產(chǎn)品目錄頁面： | 659 (CN2011-ZH PDF) |
| 其它名稱： | 658-1035-5 |
p4 of 9
26-Aug-10
USB-SPI
HW144-7
www.hexwax.com
Max Bus Power
The maximum power required by your product is
specified by the Max Bus Power fuse. It allows the host
to balance its power budget, and is subject to certain
limitations:
1. No device may consume more than its Max Bus
Power specification at any time, and never more
than 500mA.
2. No device may consume more than 100mA unless
the Low Power output pin indicates it permitted to
do so.
3. If the Suspend mode output pin go high, (or the All-
Systems-Go / Host Ready outputs go low), the host
is in sleep mode and the product may draw no more
than 100μA from the bus (not including the power
consumed by the USB-SPI chip).
Unless otherwise configured, the default value is 100mA.
Power Source
The device can be self powered only, USB bus powered
only, or both. If both, the Self Power sense input pin
should be used to indicate when the device is using its
own power and not consuming bus power.
This
information will be communicated to the host.
Unless otherwise configured, the default source is USB
only.
SPI Mode
Specifies the SPI operating mode as indicated in table 3.
Null Tx Char
Specifies the character which should be sent if the host
microcontroller attempts to read a character when the
Tx buffer is empty. The default value is 0xFF.
If the Tx buffer is empty, a null character will always be
loaded into the SPI port for transmission.
It is not
possible to remove it from the transmission stream,
even if data arrives in the Tx buffer prior to the SPI port
clocking the null character out.
Null Rx Char
Specifies an optional character which, if received, will be
ignored and not added to the Rx buffer for transmission
to the PC. Disabled by default.
Acknowledge
HID buffers discard old data if they get full. If your host
application might be too busy to process data
immediately, you may specify that all data transmitted to
the host must be acknowledged as read using an
acknowledge command before further data is sent.
Unless otherwise configured, this is disabled by default.
Likewise,
the host
may
request
that
USB-SPI
acknowledges every packed as having been processed.
In this case it acknowledges automatically. In this case,
the acknowledge is sent when the data has been safely
buffered, not when it has completed outputting from TxD.
The Acknowledge operation is between the USB-SPI
chip and the PC; its operation is transparent to the SPI
host.
Custom VID / PID
Personalized Vendor and Product IDs are not required.
However, you may customize them if you wish. Unless
otherwise configured, the default Vendor ID is 0x0B40,
and the default Product ID 0x012B for the 28-pin device
and 0x011C for the 20-pin device.
Device Strings
Device strings are non-volatile Unicode strings stored by
the USB-SPI and which may be read by the host PC
and all its applications.
For information on how to
modify them, refer to the customization section.
Product Name
The manufacturer name is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
1. The host PC commonly displays this string while it is
installing the default HID driver when it is first inserted.
Unless otherwise configured, the default value is “USB-
SPI”.
Manufacturer Name
The manufacturer name is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
2. The host PC commonly displays this string while it is
installing the default HID driver when it is first inserted.
Unless otherwise configured, the default value is
“Firmware Factory Ltd”.
Serial Number
The Serial Number data is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
3. The Serial Number is a unique string which you can
use to differentiate one physical device from other
devices with the same USB-SPI Vendor ID / Product ID /
Product
GUID
combination.
Unless
otherwise
configured, the default value is a unique value.
Product GUID
The product GUID is a Unicode string of up to 61
characters plus zero terminator. The host application
can read this data using a Get Feature request for string
4. The product GUID is a string which you can use to
differentiate a product from other devices with the USB-
SPI Vendor ID / Product ID combination. It should be
the same for all products of the same type. Unless
otherwise configured, the default value is “No GUID”.
Config (EEPROM) String
The configuration data is a Unicode string of up to 61
characters plus zero terminator (i.e. 122 bytes). You
can use it as you wish to store configuration data on the
product which the host software can access. The host
application can read this data using a Get Feature
request for string 5. Unless otherwise configured, the
default value is “No Config”.
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