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| 型号： | XR16M770IL32-0B-EB |
| 厂商： | Exar Corporation |
| 文件页数： | 52/52页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR16M770-B 32QFN |
| 标准包装： | 1 |
| 系列： | * |
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XR16M770
9
REV. 1.0.2
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO
2.3
Device Reset
The RESET input resets the internal registers and the serial interface outputs to their default state (see
Table 18). An active high pulse of longer than 40 ns duration will be required to activate the reset function in
the device. Following a power-on reset or an external reset, the M770 is software compatible with previous
generation of UARTs, XR16L570 and ST16C550.
2.4
Internal Registers
The M770 has a set of 16550 compatible registers for controlling, monitoring and data loading and unloading.
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 M770 offers enhanced feature registers (EFR, Xon1/
Xoff 1, Xon2/Xoff 2, DLD, FCTR, EMSR, FC and TRIG) that provide automatic RTS and CTS hardware flow
control, automatic Xon/Xoff software flow control, 9-bit (Multidrop) mode, auto RS-485 half duplex control,
different baud rate for TX and RX and fractional baud rate generator. All the register functions are discussed in
full detail later in “Section 3.0, UART INTERNAL REGISTERS” on page 23.
2.5
INT Ouput
The interrupt outputs change according to the operating mode and enhanced features setup. Table 1 and 2
TABLE 1: INT PIN OPERATION FOR TRANSMITTER
FCR BIT-0 = 0 (FIFO DISABLED)
FCR BIT-0 = 1 (FIFO ENABLED)
INT Pin
LOW = One byte in THR
HIGH = THR empty
LOW = FIFO above trigger level
HIGH = FIFO below trigger level or FIFO empty
TABLE 2: INT PIN OPERATION FOR RECEIVER
FCR BIT-0 = 0 (FIFO DISABLED)
FCR BIT-0 = 1 (FIFO ENABLED)
INT Pin
HIGH = One byte in RHR
LOW = RHR empty
LOW = FIFO below trigger level
HIGH = FIFO above trigger level or RX Data Timeout
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相关代理商/技术参数 |
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| XR16M770IL32-0C-EB | 功能描述:界面开发工具 Eval Board for XR16M770IL32 Series 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 |
| XR16M770IL32-F | 功能描述:UART 接口集成电路 1.8 HIGH PERFORMANCE UART W/64 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 |
| XR16M770IL32TR-F | 制造商:Exar Corporation 功能描述:UART 1-CH 64Byte FIFO 1.8V/2.5V/3.3V 32-Pin QFN EP T/R 制造商:Exar Corporation 功能描述:XR16M770IL32TR-F |
| XR16M780 | 制造商:EXAR 制造商全称:EXAR 功能描述:1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO |
| XR16M780IB25 | 制造商:EXAR 制造商全称:EXAR 功能描述:1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO |
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