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参数资料
| 型号： | MAX14830ETM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 28/68页 |
| 文件大小： | 0K |
| 描述： | IC UART |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | * |
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34
Maxim Integrated
Quad Serial UART with 128-Word FIFOs
MAX14830
LSR—Line Status Register
The Line Status Register shows all errors related to the word in the RxFIFO most recently read out of the RHR. The LSR
bits are not cleared upon a read; these bits stay set until the next character without errors is read out of the RHR. The
LSR also reflects the current state of the CTS_ input.
Bit 7: CTSbit
The CTSbit reflects the current logic state of the CTS_ input. This bit is cleared when the CTS_ input is low. Following
a power-up or reset, the logic state of CTSbit depends on the input of the CTS_ input.
Bit 6: No Function
Bit 5: RxNoise
If noise is detected on the RX_ input during reception of a character, the RxNoise bit is set for that character. The
RxNoise bit indicates that there was noise on the line while the most recently read character residing in the RHR was
being received. The RxNoise flag can generate an ISR[0] interrupt, if enabled through LSRIntEn[5].
Bit 4: RxBreak
If a line BREAK (RX_ input low for a period longer than the programmed character duration) is detected, a BREAK char-
acter is put in the RxFIFO and the RxBreak bit is set for this character. A BREAK character is represented by an all-zeros
data character. The RxBreak bit distinguishes a regular character with all zeros from a BREAK character. LSR[4] corre-
sponds to the character most recently read out of the RHR. RxBreak is cleared after the character following the BREAK
character is read out of the RHR. The RxBreak flag can generate an ISR[0] interrupt if enabled through LSRIntEn[4].
Bit 3: FrameErr
The FrameErr bit is set high when the received data frame does not match the expected frame format in length. LSR[3]
corresponds to the frame error of the character most recently read out of the RHR. A frame error is related to errors in
expected STOP bits. The FrameErr flag can generate an ISR[0] interrupt, if enabled, through LSRIntEn[3].
Bit 2: RxParityErr
If the parity computed on the character being received does not match the received character’s parity bit, the
RxParityErr bit is set for that character. LSR[2] indicates a parity error for the character most recently read out of the
RHR. In 9-bit multidrop mode (MODE2[6] = 1) the receiver does not check parity and the LSR[2] represents the 9th
(i.e. address or data) bit.
The RxParityErr flag can generate an ISR[0] interrupt, if enabled through LSRIntEn[2].
Bit 1: RxOverrun
If the Receive FIFO is full and additional data is received that does not fit into the Receive FIFO, the LSR[1] bit is set.
The Receive FIFO retains the data in it and discards all new data that does not fit into it. The RxOverrun flag can gener-
ate an ISR[0] interrupt, if enabled through LSRIntEn[1].
ADDRESS:
0x04
MODE:
R
BIT
7
6
5
4
3
2
1
0
NAME
CTSbit
—
RxNoise
RxBreak
FrameErr
RxParityErr
RxOverrun
RTimeout
RESET
X
0
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相关代理商/技术参数 |
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|---|---|
| MAX14830EVKIT# | 功能描述:界面开发工具 MAX14830 Eval Kit 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 |
| MAX14830EVKIT+ | 制造商:Maxim Integrated Products 功能描述:QUAD UART EV-KIT WITH IO-LINK AND MULTIPROTOCOL - Boxed Product (Development Kits) |
| MAX1483C/D+ | 功能描述:RS-485接口IC low-power transceivers for RS-485 and RS-422 communication RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1483CPA | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1483CPA+ | 功能描述:RS-422/RS-485 接口 IC Slew-Rate-Limited RS-485 Transceivers RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
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