參數(shù)資料
型號(hào)： SC16C550IA44
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Universal Asynchronous Receiver/Transmitter (UART) with 16-byte FIFO and infrared (IrDA) encoder/decoder
中文描述： 1 CHANNEL(S), 3M bps, SERIAL COMM CONTROLLER, PQCC44
封裝： PLASTIC, MS-018, SOT187-2, LCC-44
文件頁(yè)數(shù)： 12/52頁(yè)
文件大?。?/td> 639K
代理商： SC16C550IA44
Philips Semiconductors
SC16C550
UART with 16-byte FIFO and IrDA encoder/decoder
Product data
Rev. 05 — 19 June 2003
12 of 52
9397 750 11619
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
6.3.2
Auto-CTS (see
Figure 5
)
The transmitter circuitry checks CTS before sending the next data byte. When CTS is
active, it sends the next byte. To stop the transmitter from sending the following byte,
CTS must be released before the middle of the last stop bit that is currently being
sent (see
Figure 6
). The auto-CTS function reduces interrupts to the host system.
When flow control is enabled, CTS level changes do not trigger host interrupts
because the device automatically controls its own transmitter. Without auto-CTS, the
transmitter sends any data present in the transmit FIFO and a receiver overrun error
may result.
6.3.3
Enabling autoflow control and auto-CTS
Autoflow control is enabled by setting Enhanced Feature register bits 6 and 7
(autoflow enable or AFE) to a ‘1’.
6.3.4
Auto-CTS and auto-RTS functional timing
The receiver FIFO trigger level can be set to 1, 4, 8, or 14 bytes. These are described
in
Figure 7
and
Figure 8
.
(1) When CTS is LOW, the transmitter keeps sending serial data out.
(2) If CTS goes HIGH before the middle of the last stop bit of the current byte, the transmitter finishes sending the current byte,
but is does not send the next byte.
(3) When CTS goes from HIGH to LOW, the transmitter begins sending data again.
Fig 6.
CTS functional timing waveforms.
START
BITS 0-7
START
BITS 0-7
START
BITS 0-7
STOP
STOP
STOP
TX
CTS
002aaa049
(1) N = RCV FIFO trigger level (1, 4, or 8 bytes).
(2) The two blocks in dashed lines cover the case where an additional byte is sent as described in the preceding auto-RTS
section.
Fig 7.
RTS functional timing waveforms, RCV FIFO trigger level = 1, 4, or 8 bytes.
START
BYTE N
START
BYTE N + 1
START
BYTE
STOP
STOP
STOP
RX
RTS
IOR
(RD RBR)
N
N+1
1
2
002aaa050
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C550IA44,512 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH UART 16B 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
SC16C550IA44,518 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH UART 16B 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
SC16C550IA44,529 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH UART 16B 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
SC16C550IB48 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Asynchronous Receiver/Transmitter (UART) with 16-byte FIFO and infrared (IrDA) encoder/decoder
SC16C550IB48,128 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH UART 16B 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
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