參數資料
| 型號： | XR20M1280IL32-F |
| 廠商： | Exar Corporation |
| 文件頁數： | 38/63頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART I2C/SPI 128 BYTE 32QFN |
| 產品培訓模塊： | UART Product Overview XR21V141x Full-Speed USB UART Family |
| 標準包裝： | 490 |
| 通道數： | 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 |
| 帶調制解調器控制功能： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 32-QFN 裸露焊盤（5x5） |
| 包裝： | 托盤 |
| 其它名稱： | 1016-1386 |
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XR20M1280
43
REV. 1.0.0
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
3.12
Scratch Pad Register (SPR) - Read/Write
This is an 8-bit general purpose register for the user to store temporary data. The content of this register is
preserved during sleep mode but becomes 0xFF (default) after a reset or a power off-on cycle.
3.13
GPIO Level Register (GPIOLVL) - Read/Write
This register provides the current state of the GPIO pins.
If a GPIO has been configured as an input:
■ A read will report the current state of the input.
■ A write to any GPIO configured as an input will not have any effect.
If a GPIO has been configured as an output:
■ A read will report the current value of the register. The current value of the register will also be the
current state of the output pin if three-state mode is not enabled (GPIO3T register).
■ A write will change the current value of the register. The current value of the register will also be the
current state of the output pin if three-state mode is not enabled (GPIO3T register).
3.14
Enhanced Mode Select Register (EMSR) - Write-only
This register replaces SPR (during a Write) and is accessible only when FCTR[6] = 1.
EMSR[1:0]: Receive/Transmit FIFO Level Count
When Scratchpad Swap (FCTR[6]) is asserted, EMSR bits 1-0 controls what mode the FIFO Level Counter is
operating in.
TABLE 16: SCRATCHPAD SWAP SELECTION
FCTR[6] EMSR[1] EMSR[0] Scratchpad is
0
X
Scratchpad
1
X
0
RX FIFO Level Counter Mode
1
0
1
TX FIFO Level Counter Mode
1
Alternate RX/TX FIFO Counter Mode
During Alternate RX/TX FIFO Level Counter Mode, the first value read after EMSR bits 1-0 have been
asserted will always be the RX FIFO Level Counter. The second value read will correspond with the TX FIFO
Level Counter. The next value will be the RX FIFO Level Counter again, then the TX FIFO Level Counter and
so on and so forth.
EMSR[2]: Send TX Immediately
Logic 0 = Do not send TX immediately (default).
Logic 1 = Send TX immediately. When FIFO is enabled and this bit is set, the next data will be written to the
TX shift register. Thus, the data will be sent out immediately instead of queuing in the FIFO. Every time, only
1 byte will be send out. Once this byte has been sent out, the EMSR[2] will go back to 0 automatically. If
more than 1 byte will be sent out, EMSR[2] needs to be set to 1 for each byte.
EMSR[3]: Invert RTS in RS485 mode
Logic 0 = RTS# output is a logic 0 during TX (default).
Logic 1 = RTS# output is a logic 1 during TX.
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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 通道數量:2 數據速率: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 通道數量:2 數據速率: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 通道數量:2 數據速率: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 通道數量:2 數據速率: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 通道數量:2 數據速率: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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