- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299932 > ST16C1551CJ28 (EXAR CORP) 1 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC28 PDF資料下載
參數(shù)資料
| 型號： | ST16C1551CJ28 |
| 廠商： | EXAR CORP |
| 元件分類： | Serial IO/Communication Controller |
| 英文描述： | 1 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 37/38頁 |
| 文件大?。?/td> | 622K |
| 代理商： | ST16C1551CJ28 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁當(dāng)前第37頁第38頁
ST16C1550/51
xr
2.97V TO 5.5V UART WITH 16-BYTE FIFO
REV. 4.2.1
8
2.0 FUNCTIONAL DESCRIPTIONS
2.1
Internal Registers
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
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.
2.3
Crystal Oscillator or External Clock
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
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.
TABLE 1: TXRDY AND RXRDY BITS IN FIFO AND DMA MODE
PINS
FCR BIT-0=0
(FIFO DISABLED)
FCR BIT-0=1 (FIFO ENABLED)
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 |
|---|---|
| ST16C2552CJ44 | 2 CHANNEL(S), 4M bps, SERIAL COMM CONTROLLER, PQCC44 |
| ST16C552CJ68 | 2 CHANNEL(S), SERIAL COMM CONTROLLER, PQCC68 |
| ST16C554DCJ68 | 4 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC68 |
| ST1803DHI | High Voltage Fast-Switching NPN Power Transistor(高電壓快速開關(guān)NPN功率晶體管) |
| ST180S16P1PBF | 314 A, 1600 V, SCR, TO-209AB |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST16C1551CJ28-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 |
| ST16C1551CP28 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551CQ48 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551CQ48-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 |
| ST16C1551IJ28 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。