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ST16C2450CP40 Folha de dados(PDF) 4 Page - Exar Corporation |
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ST16C2450CP40 Folha de dados(HTML) 4 Page - Exar Corporation |
4 / 29 page ST16C2450 áç áç áç áç 2.97V TO 5.5V DUART REV. 4.0.0 4 INTB 32 29 O UART channel B Interrupt output. The output state is defined by the user and through the software setting of MCR[3]. INTB is set to the active mode and OP2B# output to a logic 0 when MCR[3] is set to a logic 1. INTB is set to the three state mode and OP2B# to a logic 1 when MCR[3] is set to a logic 0 (default). MODEM OR SERIAL I/O INTERFACE TXA 13 7 O UART channel A Transmit Data. If it is not used, leave it unconnected. RXA 11 5 I UART channel A Receive Data. Normal receive data input must idle at logic 1 condition. If it is not used, tie it to VCC or pull it high via a 100k ohm resistor. RTSA# 36 33 O UART channel A Request-to-Send (active low) or general purpose out- put. If it is not used, leave it unconnected. CTSA# 40 38 I UART channel A Clear-to-Send (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. DTRA# 37 34 O UART channel A Data-Terminal-Ready (active low) or general purpose output. If it is not used, leave it unconnected. DSRA# 41 39 I UART channel A Data-Set-Ready (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. CDA# 42 40 I UART channel A Carrier-Detect (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. RIA# 43 41 I UART channel A Ring-Indicator (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. OP2A# 35 32 O Output Port 2 Channel A - The output state is defined by the user and through the software setting of MCR[3]. INTA is set to the active mode and OP2A# output to a logic 0 when MCR[3] is set to a logic 1. INTA is set to the three state mode and OP2A# to a logic 1 when MCR[3] is set to a logic 0. This output should not be used as a general output else it will disturb the INTA output functionality. If it is not used at all, leave it unconnected. TXB 14 8 O UART channel B Transmit Data. If it is not used, leave it unconnected. RXB 10 4 I UART channel B Receive Data. Normal receive data input must idle at logic 1 condition. If it is not used, tie it to VCC or pull it high via a 100k ohm resistor. RTSB# 27 22 O UART channel B Request-to-Send (active low) or general purpose out- put. If it is not used, leave it unconnected. CTSB# 28 23 I UART channel B Clear-to-Send (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. DTRB# 38 35 O UART channel B Data-Terminal-Ready (active low) or general purpose output. If it is not used, leave it unconnected. Pin Description NAME 44-PLCC PIN # 48-TQFP PIN # TYPE DESCRIPTION |
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Descrição semelhante - ST16C2450CP40 |
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