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參數(shù)資料
| 型號： | XR21V1414IM-0A-EB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 2/34頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR XR21V1414IM |
| 產(chǎn)品培訓模塊： | UART Product Overview XR21V141x Full-Speed USB UART Family |
| 標準包裝： | 1 |
| 主要目的： | 接口，USB 2.0 至 UART |
| 嵌入式： | 否 |
| 已用 IC / 零件： | XR21V1414IM |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | 1016-1304-ND - IC UART FIFO USB QUAD 48TQFP |
| 其它名稱： | 1016-1303 |
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XR21V1414
10
4-CH FULL-SPEED USB UART
REV. 1.3.0
1.3
I2C Interface
The I2C interface provides connectivity to an external I2C memory device (i.e. EEPROM) that can be read by
the V1414 for configuration.
The SDA and SCL are used to specify whether Remote Wakeup and/or Bus Powered configurations are to be
supported. These pins are sampled at power-up. The following table describes how Remote Wakeup and Bus
Powered support.
1.3.1
EEPROM Contents
If SDA and SCL are both logic ’1’, the V1414 device will first confirm if there is an external EEPROM attached
by attempting to read the first 8 locations of the ROM. If address 0x07 of the ROM contains the value 0x58 (as
specified in Table 3), the contents of the ROM are assumed to be valid. Otherwise the EEPROM will be
ignored and the SDA / SCL bits are used to indicate remote wakeup support and device power mode.
The I2C address must be 0xA0. An EEPROM can be used to override default Vendor IDs and Device IDs, as
well as other attributes and maximum power consumption. Exar provides an in-circuit EEPROM programming
utility through the USB interface using UART Control block 0x65. Refer to Table 5, “Control Blocks,” on
page 17. The EEPROM programming utility can be downloaded from the Exar website. These values are
uploaded from the EEPROM to the corresponding USB Standard Device Descriptor or Standard Configuration
Descriptor. For details of the USB Descriptors, refer to the USB 2.0 specifications.
1.3.1.1
Vendor ID
The Vendor ID value replaces the idVendor field in the USB Standard Device Descriptor.
1.3.1.2
Product ID
The Product ID value replaces the idProduct field in the USB Standard Device Descriptor.
TABLE 2: REMOTE WAKEUP AND POWER MODES
SDA
SCL
REMOTE WAKE-UP
SUPPORT
POWER MODE
1
No
Self-Powered
1
0
No
Bus-Powered
0
1
Yes
Self-Powered
0
Yes
Bus-Powered
TABLE 3: EEPROM CONTENTS
EEPROM
ADDRESS
CONTENTS
0
Vendor ID (LSB)
1
Vendor ID (MSB)
2
Product ID (LSB)
3
Product ID (MSB)
4
Device Attributes
5
Device Maximum Power
6
Reserved
7
Signature of 0x58 (’X’). If the signature is not correct, the contents of the EEPROM are ignored.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR21V1414IM-0B-EB | 功能描述:界面開發(fā)工具 For XR21V1414 TQFP48 USB, RS232;No Cables RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XR21V1414IM48 | 制造商:EXAR 制造商全稱:EXAR 功能描述:4-CH FULL-SPEED USB UART |
| XR21V1414IM48-F | 功能描述:USB 接口集成電路 4-Ch 12Mbps 48MHz Internal clock; UART RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| XR21V1414IM48-F | 制造商:Exar Corporation 功能描述:IC QUAD UART 12MBPS 3.63V 48-TQFP |
| XR21V1414IM48TR-F | 制造商:Exar Corporation 功能描述:USB-to-UART 4-CH 128Byte FIFO 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR21V1414 Series 12 Mbps 3.63 V Quad Channel USB UART SMT - TQFP-48 制造商:Exar Corporation 功能描述:XR21V1414IM48TR-F 制造商:EXAR 功能描述:USB-to-UART 4-CH 128Byte FIFO 48-Pin TQFP T/R |
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