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| 型號： | XR20M1280IL32-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 5/63頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART I2C/SPI 128 BYTE 32QFN |
| 產(chǎn)品培訓(xùn)模塊： | UART Product Overview XR21V141x Full-Speed USB UART Family |
| 標準包裝： | 490 |
| 通道數(shù)： | 1，UART |
| FIFO's： | 128 字節(jié) |
| 規(guī)程： | RS485 |
| 電源電壓： | 1.62 V ~ 3.63 V |
| 帶自動流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動位檢測功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-QFN 裸露焊盤（5x5） |
| 包裝： | 托盤 |
| 其它名稱： | 1016-1386 |
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XR20M1280
13
REV. 1.0.0
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
1.3
Device Reset
The RESET# input resets the internal registers and the serial interface outputs to their default state (see
Table 21). An active low 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 M1280 is software compatible with previous
generation of UARTs.
1.4
5-Volt Tolerant Inputs
The M1280 can accept and withstand 5V signals on the inputs without any damage. But note that if the supply
voltage for the M1280 is at the lower end of the supply voltage range (ie. 1.8V), its VOH may not be high
enough to meet the requirements of the VIH of a CPU or a serial transceiver that is operating at 5V. Caution:
XTAL1 is not 5 volt tolerant.
1.5
Internal Registers
The M1280 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 M1280 offers enhanced feature registers (EFR,
Xon1/Xoff1, Xon2/Xoff2, DLD, FCTR, EMSR, FC and TRIG, SFR, SHR, GPIOINT, GPIO3T, GPIOINV,
GPIOSEL) 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 2.0, UART
1.6
IRQ# Ouput
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 Figure 33 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 = One byte in THR
LOW = THR empty
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or FIFO empty
IRQ# Pin
YES
HIGH = One byte in THR
LOW = THR empty
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or FIFO empty
TABLE 5: IRQ# PIN OPERATION FOR RECEIVER
FCR BIT-0 = 0
(FIFO DISABLED)
FCR BIT-0 = 1
(FIFO ENABLED)
IRQ# Pin
HIGH = One byte in THR
LOW = RHR empty
HIGH = FIFO above trigger level
LOW = FIFO above trigger level or RX Data Timeout
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| XR20M1280IL32TR-F | 功能描述:UART 接口集成電路 1Ch 12C/SPI UART w/ Lvl Shftrs & 8 GPIOs RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR20M1280IL40-F | 功能描述:UART 接口集成電路 1Ch 12C/SPI UART w/ Lvl Shftrs & 16GPIOs RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR20M1280IL40TR-F | 功能描述:UART 接口集成電路 1Ch 12C/SPI UART w/ Lvl Shftrs & 16GPIOs RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR20M1280L24-0A-EB | 功能描述:UART 接口集成電路 EVAL F/M1280 QFN24 I2C INTERFACE RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR20M1280L24-0B-EB | 功能描述:UART 接口集成電路 EVAL F/ M1280 QFN24 SPI INTERFACE RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
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