參數(shù)資料
型號(hào)： SC16C654
廠(chǎng)商： NXP Semiconductors N.V.
英文描述： Quad UART with 64-byte FIFO and infrared (IrDA) encoder/decoder
中文描述： 四的UART具有64字節(jié)FIFO和紅外（IrDA）編碼器/解碼器
文件頁(yè)數(shù)： 11/52頁(yè)
文件大?。?/td> 647K
代理商： SC16C654
Philips Semiconductors
SC16C654/654D
Quad UART with 64-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 04 — 19 June 2003
11 of 52
9397 750 11617
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
6.
Functional description
The SC16C654/654D provides serial asynchronous receive data synchronization,
parallel-to-serial and serial-to-parallel data conversions for both the transmitter and
receiver sections. These functions are necessary for converting the serial data
stream into parallel data that is required with digital data systems. Synchronization for
the serial data stream is accomplished by adding start and stop bits to the transmit
data to form a data character. Data integrity is insured by attaching a parity bit to the
data character. The parity bit is checked by the receiver for any transmission bit
errors. The electronic circuitry to provide all these functions is fairly complex,
especially when manufactured on a single integrated silicon chip. The
SC16C654/654D represents such an integration with greatly enhanced features. The
SC16C654/654D is fabricated with an advanced CMOS process to achieve low drain
power and high speed requirements.
The SC16C654/654D is an upward solution that provides 64 bytes of transmit and
receive FIFO memory, instead of 16 bytes provided in the 16C554, or none in the
16C454. The SC16C654/654D is designed to work with high speed modems and
shared network environments that require fast data processing time. Increased
performance is realized in the SC16C654/654D by the larger transmit and receive
FIFOs. This allows the external processor to handle more networking tasks within a
given time. For example, the SC16C554 with a 16-byte FIFO unloads 16 bytes of
receive data in 1.53 ms. (This example uses a character length of 11 bits, including
start/stop bits at 115.2 kbit/s.) This means the external CPU will have to service the
receive FIFO at 1.53 ms intervals. However, with the 64-byte FIFO in the
SC16C654/654D, the data buffer will not require unloading/loading for 6.1 ms. This
increases the service interval, giving the external CPU additional time for other
applications and reducing the overall UART interrupt servicing time. In addition, the
four selectable levels of FIFO trigger interrupt and automatic hardware/software flow
control is uniquely provided for maximum data throughput performance, especially
when operating in a multi-channel environment. The combination of the above greatly
reduces the bandwidth requirement of the external controlling CPU, increases
performance, and reduces power consumption.
The SC16C654/654D combines the package interface modes of the 16C454/554 and
68C454/554 series on a single integrated chip. The 16 mode interface is designed to
operate with the Intel-type of microprocessor bus, while the 68 mode is intended to
operate with Motorola and other popular microprocessors. Following a reset, the
SC16C654/654D is downward compatible with the 16C454/554 or the 68C454/554,
dependent on the state of the interface mode selection pin, 16/68.
The SC16C654/654D is capable of operation to 1.5 Mbits/s with a 24 MHz crystal and
up to 5 Mbits/s with an external clock input (at 3.3 V and 5 V; at 2.5 V the max speed
is 3 Mbits/s). With a crystal of 14.7464 MHz, and through a software option, the user
can select data rates up to 460.8 kbits/s or 921.6 kbits/s, 8 times faster than the
16C554.
The rich feature set of the SC16C654/654D is available through internal registers.
Automatic hardware/software flow control, selectable transmit and receive FIFO
trigger levels, selectable TX and RX baud rates, infrared encoder/decoder interface,
modem interface controls, and a sleep mode are all standard features. MCR[5]
provides a facility for turning off (Xon) software flow control with any incoming (RX)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C654B 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.), with 64-byte FIFOs and infrared (IrDA) encoder/decoder
SC16C654BIA68 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH UART 64B FIFO 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
SC16C654BIA68,512 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH 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
SC16C654BIA68,518 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH 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
SC16C654BIA68,529 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH 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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