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參數(shù)資料
| 型號： | XR19L400IL40TR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 25/46頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART/TXRX RS485 40QFN |
| 標準包裝： | 3,000 |
| 特點： | * |
| 通道數(shù)： | 1，UART |
| FIFO's： | 64 字節(jié) |
| 規(guī)程： | RS485 |
| 電源電壓： | 3.3V，5V |
| 帶自動流量控制功能： | 是 |
| 帶故障啟動位檢測功能： | 是 |
| 帶調制解調器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 40-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 40-QFN 裸露焊盤（6x6） |
| 包裝： | 帶卷 (TR) |
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XR19L400
31
REV. 1.0.3
SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
MSR[0]: Delta CTS# Input Flag (Internal Loopback Mode Only)
Logic 0 = No change on CTS# input (default).
Logic 1 = The CTS# input has changed state since the last time it was monitored. A modem status interrupt
will be generated if MSR interrupt is enabled (IER bit-3).
MSR[1]: Delta DSR# Input Flag (Internal Loopback Mode Only)
Logic 0 = No change on DSR# input (default).
Logic 1 = The DSR# input has changed state since the last time it was monitored. A modem status interrupt
will be generated if MSR interrupt is enabled (IER bit-3).
MSR[2]: Delta RI# Input Flag (Internal Loopback Mode Only)
Logic 0 = No change on RI# input (default).
Logic 1 = The RI# input has changed from a LOW to HIGH, ending of the ringing signal. A modem status
interrupt will be generated if MSR interrupt is enabled (IER bit-3).
MSR[3]: Delta CD# Input Flag (Internal Loopback Mode Only)
Logic 0 = No change on CD# input (default).
Logic 1 = Indicates that the CD# input has changed state since the last time it was monitored. A modem
status interrupt will be generated if MSR interrupt is enabled (IER bit-3).
MSR[4]: CTS Input Status
CTS# is not available as an input pin on the L400, but it is available for use during internal loopback mode.
This bit is equivalent to the RTS# bit in the MCR register.
MSR[5]: DSR Input Status
CTS# is not available as an input pin on the L400, but it is available for use during internal loopback mode.
This bit is equivalent to the DTR# bit in the MCR register.
MSR[6]: RI Input Status
RI# is not available as an input pin on the L400, but it is available for use during internal loopback mode. This
bit is equivalent to bit-2 in the MCR register.
MSR[7]: CD Input Status
CD# is not available as an input pin on the L400, but it is available for use during internal loopback mode. This
bit is equivalent to bit-3 in the MCR register.
4.10
Scratch Pad Register (SPR) - Read/Write
This is a 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.
4.11
Enhanced Mode Select Register (EMSR)
This register replaces SPR (during a Write) and is accessible only when FCTR[6] = 1.
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