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参数资料
型号： ST16C2552CJ44
厂商： EXAR CORP
元件分类： Serial IO/Communication Controller
英文描述： 2 CHANNEL(S), 4M bps, SERIAL COMM CONTROLLER, PQCC44
封装： PLASTIC, LCC-44
文件页数： 31/38页
文件大小： 447K
代理商： ST16C2552CJ44
ST16C2552
I
REV. 4.2.1
2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO
TABLE OF CONTENTS
GENERAL DESCRIPTION................................................................................................. 1
APPLICATIONS............................................................................................................................................. 1
FEATURES .................................................................................................................................................. 1
FIGURE 1. ST16C2552 BLOCK DIAGRAM................................................................................................................................................. 1
FIGURE 2. PIN OUT ASSIGNMENT............................................................................................................................................................. 2
ORDERING INFORMATION
............................................................................................................................. 2
PIN DESCRIPTIONS ......................................................................................................... 3
1.0 Product DESCRIPTION ........................................................................................................... 6
2.0 FUNCTIONAL DESCRIPTIONS ............................................................................................... 7
2.1 CPU INTERFACE ................................................................................................................................. 7
FIGURE 3. ST16C2552 DATA BUS INTERCONNECTIONS ......................................................................................................................... 7
2.2 DEVICE RESET .................................................................................................................................... 7
2.3 CHANNEL A AND B SELECTION ............................................................................................................ 7
TABLE 1: CHANNEL A AND B SELECT ....................................................................................................................................................... 7
2.4 CHANNEL A AND B INTERNAL REGISTERS ............................................................................................ 8
2.5 SIMULTANEOUS WRITE TO CHANNEL A AND B ...................................................................................... 8
2.6 DMA MODE ........................................................................................................................................ 8
TABLE 2: TXRDY# AND RXRDY# OUTPUTS IN FIFO AND DMA MODE .................................................................................................... 8
2.7 INTA AND INTB OUPUTS .................................................................................................................... 9
TABLE 3: INTA AND INTB PINS OPERATION FOR TRANSMITTER................................................................................................................ 9
TABLE 4: INTA AND INTB PIN OPERATION FOR RECEIVER....................................................................................................................... 9
2.8 CRYSTAL OSCILLATOR OR EXT. CLOCK INPUT ...................................................................................... 9
FIGURE 4. TYPICAL OSCILLATOR CONNECTIONS ........................................................................................................................................ 9
2.9 PROGRAMMABLE BAUD RATE GENERATOR ......................................................................................... 10
FIGURE 5. EXTERNAL CLOCK CONNECTION FOR EXTENDED DATA RATE ................................................................................................. 10
FIGURE 6. OPERATING FREQUENCY CHART. REQUIRES A 2K OHMS PULL-UP RESISTOR ON XTAL2 PIN TO INCREASE OPERATING SPEED.10
TABLE 5: TYPICAL DATA RATES WITH A 14.7456 MHZ CRYSTAL OR EXTERNAL CLOCK.............................................................................. 11
2.10 TRANSMITTER ................................................................................................................................. 11
2.10.1 Transmit Holding Register (THR) - Write Only ....................................................................................... 11
2.10.2 Transmitter Operation in non-FIFO Mode .............................................................................................. 11
FIGURE 7. TRANSMITTER OPERATION IN NON-FIFO MODE...................................................................................................................... 12
2.10.3 Transmitter Operation in FIFO Mode ..................................................................................................... 12
FIGURE 8. TRANSMITTER OPERATION IN FIFO MODE ............................................................................................................................. 12
2.11 RECEIVER ....................................................................................................................................... 12
2.11.1 Receive Holding Register (RHR) - Read-Only ....................................................................................... 13
FIGURE 9. RECEIVER OPERATION IN NON-FIFO MODE ........................................................................................................................... 13
FIGURE 10. RECEIVER OPERATION IN FIFO MODE ................................................................................................................................. 13
2.12 INTERNAL LOOPBACK ..................................................................................................................... 14
FIGURE 11. INTERNAL LOOP BACK IN CHANNEL A AND B........................................................................................................................ 14
3.0 UART INTERNAL REGISTERS ............................................................................................. 15
TABLE 6: UART CHANNEL A AND B UART INTERNAL REGISTERS ............................................................................................. 15
TABLE 7: INTERNAL REGISTERS DESCRIPTION........................................................................................................................... 16
4.0 INTERNAL Register descriptions ........................................................................................ 16
4.1 RECEIVE HOLDING REGISTER (RHR) - READ- ONLY ........................................................................... 16
4.2 TRANSMIT HOLDING REGISTER (THR) - WRITE-ONLY ......................................................................... 16
4.3 BAUD RATE GENERATOR DIVISORS (DLL AND DLM) - READ/WRITE ................................................... 17
4.4 INTERRUPT ENABLE REGISTER (IER) - READ/WRITE .......................................................................... 17
4.4.1 IER versus Receive FIFO Interrupt Mode Operation ............................................................................... 17
4.4.2 IER versus Receive/Transmit FIFO Polled Mode Operation.................................................................... 17
4.5 INTERRUPT STATUS REGISTER (ISR) - READ-ONLY ............................................................................ 18
4.5.1 Interrupt Generation: ................................................................................................................................ 18
4.5.2 Interrupt Clearing: .................................................................................................................................... 18
TABLE 8: INTERRUPT SOURCE AND PRIORITY LEVEL............................................................................................................................... 18
4.6 FIFO CONTROL REGISTER (FCR) - WRITE-ONLY ............................................................................... 19
TABLE 9: TRANSMIT AND RECEIVE FIFO TRIGGER LEVEL SELECTION ..................................................................................................... 19
4.7 LINE CONTROL REGISTER (LCR) - READ/WRITE ................................................................................ 20
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相关代理商/技术参数
参数描述
ST16C2552CJ44-F 功能描述:UART 接口集成电路 2.97V-5.5V 16B FIFO temp 0C to 70C; UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
ST16C2552CJ44TR 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
ST16C2552CJ44TR-F 功能描述:UART 接口集成电路 DUAL UART W/16BYTE FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
ST16C2552CQ48 制造商:未知厂家 制造商全称:未知厂家 功能描述:UART
ST16C2552IJ 制造商:Exar Corporation 功能描述:2 CHANNEL(S), 4M bps, SERIAL COMM CONTROLLER, PQCC44
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