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参数资料
| 型号： | XR20M1170L16-0A-EB |
| 厂商： | Exar Corporation |
| 文件页数： | 2/56页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR20M1170 16QFN |
| 标准包装： | 1 |
| 主要目的： | 接口，UART |
| 嵌入式： | 否 |
| 已用 IC / 零件： | XR20M1170 |
| 次要属性： | I²C & SPI 接口 |
| 已供物品： | 板 |
| 其它名称： | 1016-1618 XR20M1170L16-0A-EB-ND |
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FIGURE 10. SPI FIFO READ
SCLK
D7 D6 D5 D4 D3 D2 D1 D0
last bit
R/W A3
A2
A1
A0
0
0X
XR20M1170
10
I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.1.0
After the last read or write transaction, the SPI master will set the SCL signal back to its idle state (LOW).
2.2
Device Reset
The RESET# input resets the internal registers and the serial interface outputs in the UART to its default state
(see Table 16). An active low pulse of longer than 40 ns duration will be required to activate the reset function
in the device.
2.3
Internal Registers
The M1170 has a set of enhanced registers for control, monitoring and data loading and unloading. The
configuration register set is compatible to the industry standard ST16C550. These registers function as data
holding registers (THR/RHR), interrupt status and control registers (ISR/IER), a FIFO control register (FCR),
receive line status and control registers (LSR/LCR), modem status and control registers (MSR/MCR),
programmable data rate (clock) divisor registers (DLL/DLM/DLD), and a user accessible Scratchpad Register
(SPR).
Beyond the general 16C550 features and capabilities, the M1170 offers enhanced feature registers (EFR, Xon/
Xoff 1, Xon/Xoff 2, TCR, TLR, TXLVL, RXLVL, IODir, IOState, IOIntEna, IOControl, EFCR and DLD) that
provide automatic RTS and CTS hardware flow control, Xon/Xoff software flow control, automatic RS-485 half-
duplex direction output enable/disable, TX and RX FIFO level counters, and programmable FIFO trigger level
control. For complete details, see “Section 3.0, UART Internal Registers” on page 23.
2.4
IRQ# Output
The IRQ# interrupt output changes according to the operating mode and enhanced features setup. Table 4
and 5 summarize the operating behavior for the transmitter and receiver. Also see Figures 21 through 35.
TABLE 4: IRQ# PIN OPERATION FOR TRANSMITTER
Auto RS485
Mode
FCR BIT-0 = 0
(FIFO DISABLED)
FCR BIT-0 = 1 (FIFO ENABLED)
IRQ# Pin
NO
HIGH = a byte in THR
LOW = THR empty
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or FIFO empty
IRQ# Pin
YES
HIGH = a byte in THR
LOW = transmitter empty
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or transmitter empty
TABLE 5: IRQ# PIN OPERATION FOR RECEIVER
FCR BIT-0 = 0
(FIFO DISABLED)
FCR BIT-0 = 1
(FIFO ENABLED)
IRQ# Pin
HIGH = no data
LOW = 1 byte
HIGH = FIFO below trigger level
LOW = FIFO above trigger level
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR20M1170L16-0B-EB | 功能描述:UART 接口集成电路 Supports M1170 16pin QFN, SPI Interface RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR20M1170L24-0A-EB | 功能描述:UART 接口集成电路 Supports M1170 24pin QFN, I2C Interface RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR20M1170L24-0B-EB | 功能描述:UART 接口集成电路 Supports M1170 28pin QFN, SPI Interface RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR20M1170L28-0A-EB | 功能描述:UART 接口集成电路 Supports M1170 28pin QFN, I2C Interface RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR20M1170L28-0B-EB | 功能描述:界面开发工具 Supports M1170 28pin QFN, SPI Interface RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
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