參數(shù)資料
型號(hào)： ST16C1550IJ28
廠商： EXAR CORP
元件分類： 微控制器/微處理器
英文描述： 2.97V TO 5.5V UART WITH 16-BYTE FIFO
中文描述： 1 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC28
封裝： PLASTIC, LCC-28
文件頁數(shù)： 8/37頁
文件大?。?/td> 428K
代理商： ST16C1550IJ28
ST16C1550/51
2.97V TO 5.5V UART WITH 16-BYTE FIFO
á
REV. 4.2.0
8
2.0
FUNCTIONAL DESCRIPTIONS
2.1
The 155X has a set of enhanced registers for controlling, monitoring and data loading and unloading. These
registers function as data holding registers (THR/RHR), interrupt status and control registers (ISR/IER), a FIFO
control register (FCR), receive line status and control registers (LSR/LCR), modem status and control registers
(MSR/MCR), programmable data rate (clock) divisor registers (DLL/DLM), and a user accessible scractchpad
register (SPR). All the register functions are discussed in full detail later in
“Section 3.0, UART INTERNAL
REGISTERS” on page 14
.
2.2
DMA Mode
The DMA Mode (a legacy term) in this document does not mean “Direct Memory Access” but refers to data
block transfer operation. The DMA mode affects the state of the RXRDY and TXRDY bits (ISR bits 5 and 4
respectively). The transmit and receive FIFO trigger levels provide additional flexibility to the user for block
mode operation. The LSR bits 5-6 provide an indication when the transmitter is empty or has an empty
location(s) for more data. The user can optionally operate the transmit and receive FIFO in the DMA mode
(FCR bit-3=1). When the transmit and receive FIFO are enabled and the DMA mode is disabled (FCR bit-3 =
0), the 155X activates the TXRDY & RXRDY output pin for each data transmit or receive operation. When
DMA mode is enabled (FCR bit-3 = 1), the user takes advantage of block mode operation by loading or
unloading the FIFO in a block sequence determined by the programmed trigger level. In this mode, the 155X
sets the TXRDY bit when the transmit FIFO becomes full, and sets the RXRDY pin when the receive FIFO
becomes empty. The following table shows their behavior.
Internal Registers
2.3
The 155X includes an on-chip oscillator (XTAL1 and XTAL2). The crystal oscillator provides the system clock
to the Baud Rate Generators (BRG) in the UART. XTAL1 is the input to the oscillator or external clock buffer
input with XTAL2 pin being the output. For programming details, see
“Section 2.4, Programmable Baud Rate
Generator” on page 9
.
The on-chip oscillator is designed to use an industry standard microprocessor crystal (parallel resonant,
fundamental frequency with 10-22 pF capacitance load, ESR of 20-120 ohms and 100ppm frequency
tolerance) connected externally between the XTAL1 and XTAL2 pins (see
Figure 4
). Alternatively, an external
clock can be connected to the XTAL1 pin to clock the internal baud rate generator for standard or custom rates.
Typical oscillator connections are shown in
Figure 4
. For further reading on oscillator circuit please see
application note DAN108 on EXAR’s web site.
Crystal Oscillator or External Clock
T
ABLE
1: TXRDY
AND
RXRDY B
ITS
IN
FIFO
AND
DMA M
ODE
P
INS
FCR
BIT
-0=0
(FIFO D
ISABLED
)
FCR B
IT
-0=1 (FIFO E
NABLED
)
FCR Bit-3 = 0
(DMA Mode Disabled)
FCR Bit-3 = 1
(DMA Mode Enabled)
RXRDY
1 = 1 byte
0 = no data
1 = at least 1 byte in FIFO
0 = FIFO empty
1 = FIFO reaches the trigger level, or timeout
occurs
0 = FIFO empty
TXRDY
1 = THR empty
0 = byte in THR
1 = FIFO empty
0 = at least 1 byte in FIFO
1 = FIFO has at least 1 empty location
0 = FIFO is full
相關(guān)PDF資料
PDF描述
ST16C1550IP28 2.97V TO 5.5V UART WITH 16-BYTE FIFO
ST16C1550IQ48 2.97V TO 5.5V UART WITH 16-BYTE FIFO
ST16C1551CJ28 2.97V TO 5.5V UART WITH 16-BYTE FIFO
ST16C1551CP28 2.97V TO 5.5V UART WITH 16-BYTE FIFO
ST16C1551CQ48 2.97V TO 5.5V UART WITH 16-BYTE FIFO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST16C1550IJ28-F 功能描述:UART 接口集成電路 UART W/16BYTE 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
ST16C1550IJ28T 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
ST16C1550IJ28TR-F 功能描述:UART 接口集成電路 UART W/16 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
ST16C1550IP28 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO
ST16C1550IQ48 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*