參數(shù)資料
型號(hào)： NS16C2752
廠商： National Semiconductor Corporation
英文描述： Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
中文描述： 雙UART與16-byte/64-byte FIFO和高達(dá)5 Mbit / s的數(shù)據(jù)速率
文件頁(yè)數(shù)： 1/43頁(yè)
文件大?。?/td> 881K
代理商： NS16C2752
NS16C2552/NS16C2752
Dual UART with 16-byte/64-byte FIFO’s and up to
5 Mbit/s Data Rate
1.0 General Description
The NS16C2552 and NS16C2752 are dual channel Univer-
sal Asynchronous Receiver/Transmitter (DUART). The foot-
print and the functions are compatible to the PC16552D,
while new features are added to the UART device. These
features include low voltage support, 5V tolerant inputs,
enhanced features, enhanced register set, and higher data
rate.
The two serial channels are completely independent of each
other, except for a common CPU interface and crystal input.
On power-up both channels are functionally identical to the
PC16552D. Each channel can operate with on-chip transmit-
ter and receiver FIFO’s (in FIFO mode).
In the FIFO mode each channel is capable of buffering 16
bytes (for NS16C2552) or 64 bytes (for NS16C2752) of data
in both the transmitter and receiver. The receiver FIFO also
has additional 3 bits of error data per location. All FIFO
control logic is on-chip to minimize system software over-
head and maximize system efficiency.
To improve the CPU processing bandwidth, the data trans-
fers between the DUART and the CPU can be done using
DMA controller. Signaling for DMA transfers is done through
two pins per channel (TXRDY and RXRDY). The RXRDY
function is multiplexed on one pin with the OUT2 and BAUD-
OUT functions. The configuration is through Alternate Func-
tion Register.
The fundamental function of the UART is converting be-
tween parallel and serial data. Serial-to-parallel conversion
is done on the UART receiver and parallel-to-serial conver-
sion is done on the transmitter. The CPU can read the
complete status of each channel at any time. Status infor-
mation reported includes the type and condition of the trans-
fer operations being performed by the DUART, as well as
any error conditions (parity, overrun, framing, or break inter-
rupt).
The NS16C2552 and NS16C2752 include one program-
mable baud rate generator for each channel. Each baud rate
generator is capable of dividing the clock input by divisors of
1 to (2
16
- 1), and producing a 16X clock for driving the
internal transmitter logic and for receiver sampling circuitry.
The NS16C2552 and NS16C2752 have complete MODEM-
control capability, and a processor-interrupt system. The
interrupts can be programmed by the user to minimize the
processing required to handle the communications link.
2.0 Features
n
Dual independent UART
n
Up to 5 Mbits/s data transfer rate
n
2.97 V to 5.50 V operational Vcc
n
5 V tolerant I/Os in the entire supply voltage range
n
Industrial Temperature: -40C to 85C
n
Default registers are identical to the PC16552D
n
NS16C2552/NS16C2752 is pin-to-pin compatible to
NSC PC16552D, EXAR ST16C2552, XR16C2552, XR
16L2552, and Phillips SC16C2552B
n
NS16C2752 is compatible to EXAR XR16L2752, and
register compatible to Phillips SC16C752
n
Auto Hardware Flow Control (Auto-CTS, Auto-RTS)
n
Auto Software Flow Control (Xon, Xoff, and Xon-any)
n
Fully programmable character length (5, 6, 7, or 8) with
even, odd, or no parity, stop bit
n
Adds or deletes standard asynchronous communication
bits (start, stop, and parity) to or from the serial data
n
Independently controlled and prioritized transmit and
receive interrupts
n
Complete line status reporting capabilities
n
Line break generation and detection
n
Internal diagnostic capabilities
— Loopback controls for communications link fault
isolation
— Break, parity, overrun, framing error detection
n
Programmable baud generators divide any input clock
by 1 to (2
16
- 1) and generate the 16 X clock
n
IrDA v1.0 wireless Infrared encoder/decoder
n
DMA operation (TXRDY/RXRDY)
n
Concurrent write to DUART internal register channels 1
and 2
n
Multi-function output allows more package functions with
fewer I/O pins
n
44-PLCC or 48-TQFP package
PRELIMINARY
August 2006
N
2006 National Semiconductor Corporation
DS202048
www.national.com
相關(guān)PDF資料
PDF描述
NS16C2752TVA Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
NS32203D DIRECT MEMORY ACCESS CONTROLLER
NS32203N DIRECT MEMORY ACCESS CONTROLLER
NS32382-10 MEMORY MANAGEMENT UNITS
NS32382-15 MEMORY MANAGEMENT UNITS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NS16C2752TVA 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
NS16C2752TVA/NOPB 功能描述:UART 接口集成電路 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
NS16C2752TVAX/NOPB 功能描述:UART 接口集成電路 Dual UART w/ 64-byte 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
NS16C2752TVS 制造商:Texas Instruments 功能描述:UART 2-CH 64Byte FIFO 3.3V/5V 48-Pin TQFP
NS16C2752TVS/NOPB 功能描述:UART 接口集成電路 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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