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参数资料
| 型号： | XR21V1412IL-0B-EB |
| 厂商： | Exar Corporation |
| 文件页数： | 31/32页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR21V1412IL |
| 产品培训模块： | UART Product Overview XR21V141x Full-Speed USB UART Family |
| 标准包装： | 1 |
| 主要目的： | 接口，USB 2.0 至 UART |
| 嵌入式： | 否 |
| 已用 IC / 零件： | XR21V1412IL |
| 已供物品： | 板 |
| 其它名称： | 1016-1426 |
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XR21V1412
8
2-CH FULL-SPEED USB UART
REV. 1.3.0
1.3.1
EEPROM Contents
If SDA and SCL are both logic ’1’, the V1412 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 15. 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.
TABLE 3: EEPROM CONTENTS
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.
1.3.1.3
Device Attributes
The Device Attributes value replaces the bmAttributes field in the USB Standard Configuration Descriptor. The
default setting in the V1412 device is 0xA0. The bit field definitions are:
Bit 7 is reserved - set to ’1’
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
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR21V1412IL32 | 制造商:EXAR 制造商全称:EXAR 功能描述:2-CH FULL-SPEED USB UART |
| XR21V1412IL32-F | 功能描述:USB 接口集成电路 2-Ch 12Mbps 48MHz Internal clock; UART RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| XR21V1412IL32TR-F | 功能描述:USB 接口集成电路 2 Chan FS USB UART w/ 256 Byte FIFO RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| XR21V1414 | 制造商:EXAR 制造商全称:EXAR 功能描述:4-CH FULL-SPEED USB UART |
| XR21V1414_10 | 制造商:EXAR 制造商全称:EXAR 功能描述:4-CH FULL-SPEED USB UART |
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