參數(shù)資料
型號(hào)： SC16C750IA44
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 64-byte FIFO
中文描述： 1 CHANNEL(S), 3M bps, SERIAL COMM CONTROLLER, PQCC44
封裝： PLASTIC, MS-018, SOT-187-2, LCC-44
文件頁(yè)數(shù)： 19/45頁(yè)
文件大?。?/td> 598K
代理商： SC16C750IA44
Philips Semiconductors
SC16C750
UART with 64-byte FIFO
Product data
Rev. 04 — 20 June 2003
19 of 45
9397 750 11623
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
7.3 FIFO Control Register (FCR)
This register is used to enable the FIFOs, clear the FIFOs, set the receive FIFO
trigger levels, and select the DMA mode.
7.3.1
DMA mode
Mode 0 (FCR bit 3 = 0):
Set and enable the interrupt for each single transmit or
receive operation, and is similar to the 16C450 mode. Transmit Ready (TXRDY) will
go to a logic 0 whenever an empty transmit space is available in the Transmit Holding
Register (THR). Receive Ready (RXRDY) will go to a logic 0 whenever the Receive
Holding Register (RHR) is loaded with a character.
Mode 1 (FCR bit 3 = 1):
Set and enable the interrupt in a block mode operation. The
transmit interrupt is set when the transmit FIFO is below the programmed trigger
level. The receive interrupt is set when the receive FIFO fills to the programmed
trigger level. However, the FIFO continues to fill regardless of the programmed level
until the FIFO is full. RXRDY remains a logic 0 as long as the FIFO fill level is above
the programmed trigger level.
7.3.2
FIFO mode
Table 10:
Bit
7-6
FIFO Control Register bits description
Symbol
Description
FCR[7]
(MSB),
FCR[6]
(LSB)
equals the programmed trigger level. However, the FIFO will continue to
be loaded until it is full. Refer to
Table 11
.
FCR[5]
Logic 0 = 16-byte mode (normal default condition).
Logic 1 = 64-byte mode.
FCR[4]
Reserved.
FCR[3]
DMA mode select.
Logic 0 = Set DMA mode ‘0’ (normal default condition).
Logic 1 = Set DMA mode ‘1’
Transmit operation in mode ‘0’:
When the SC16C750 is in the 16C450
mode (FIFOs disabled; FCR[0] = logic 0) or in the FIFO mode (FIFOs
enabled; FCR[0] = logic 1; FCR[3] = logic 0), and when there are no
characters in the transmit FIFO or transmit holding register, the TXRDY
pin will be a logic 0. Once active, the TXRDY pin will go to a logic 1 after
the first character is loaded into the transmit holding register.
Receive operation in mode ‘0’:
When the SC16C750 is in 16C450
mode, or in the FIFO mode (FCR[0] = logic 1; FCR[3] = logic 0) and
there is at least one character in the receive FIFO, the RXRDY pin will
be a logic 0. Once active, the RXRDY pin will go to a logic 1 when there
are no more characters in the receiver.
RCVR trigger. These bits are used to set the trigger level for the receive
FIFO interrupt.
An interrupt is generated when the number of characters in the FIFO
5
4
3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C750IA44,512 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH 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
SC16C750IA44,518 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH 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
SC16C750IA44,529 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH 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
SC16C750IB64 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Asynchronous Receiver/Transmitter (UART) with 64-byte FIFO
SC16C750IB64,128 功能描述:UART 接口集成電路 16C 2.5V-5V 1CH 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
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