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參數(shù)資料
| 型號： | SC16IS741IPW,118 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART SGL I2C BUS SPI 16TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | * |
SC16IS741_1
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 01 — 29 April 2010
6 of 52
NXP Semiconductors
SC16IS741
Single UART with I2C-bus/SPI interface, 64-byte FIFOs, IrDA SIR
7.1 Trigger levels
The SC16IS741 provides independently selectable and programmable trigger levels for
both receiver and transmitter interrupt generation. After reset, both transmitter and
receiver FIFOs are disabled and so, in effect, the trigger level is the default value of one
character. The selectable trigger levels are available via the FCR. The programmable
trigger levels are available via the TLR. If TLR bits are cleared then selectable trigger level
in FCR is used. If TLR bits are not cleared then programmable trigger level in TLR is used.
7.2 Hardware flow control
Hardware flow control is comprised of auto CTS and auto RTS (see Figure 4). Auto CTS
and auto RTS can be enabled/disabled independently by programming EFR[7:6].
With auto CTS, CTS must be active before the UART can transmit data.
Auto RTS only activates the RTS output when there is enough room in the FIFO to receive
data and de-activates the RTS output when the RX FIFO is sufficiently full. The halt and
resume trigger levels in the TCR determine the levels at which RTS is
activated/deactivated. If TCR bits are cleared then selectable trigger levels in FCR are
used in place of TCR.
If both auto CTS and auto RTS are enabled, when RTS is connected to CTS, data
transmission does not occur unless the receiver FIFO has empty space. Thus, overrun
errors are eliminated during hardware flow control. If not enabled, overrun errors occur if
the transmit data rate exceeds the receive FIFO servicing latency.
Fig 4.
Autoflow control (auto RTS and auto CTS) example
RX
FIFO
FLOW
CONTROL
TX
FIFO
PARALLEL
TO SERIAL
TX
FIFO
RX
FIFO
UART 1
UART 2
RX
TX
RTS
CTS
TX
RX
CTS
RTS
002aab656
SERIAL TO
PARALLEL
SERIAL TO
PARALLEL
FLOW
CONTROL
FLOW
CONTROL
FLOW
CONTROL
PARALLEL
TO SERIAL
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相關(guān)代理商/技術(shù)參數(shù) |
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| SC16IS74Q900 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single UART with I2C-bus/SPI interface, 64 bytes of transmit and receive FIFOs |
| SC16IS750 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single UART with I2C-bus/SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support |
| SC16IS750IBS | 功能描述:UART 接口集成電路 I2C/SPI-UARTBRIDGE W/IRDA AND GPIO 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 |
| SC16IS750IBS,128 | 功能描述:UART 接口集成電路 I2C/SPI-UARTBRIDGE W/IRDA AND GPIO 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 |
| SC16IS750IBS,151 | 功能描述:UART 接口集成電路 UART I2C/SPI 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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