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ST16C2552 データシート(PDF) 5 Page - Exar Corporation |
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ST16C2552 データシート(HTML) 5 Page - Exar Corporation |
5 / 36 page ST16C2552 5 REV. 4.2.1 2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain. RIA# 43 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. TXB 26 O UART channel B Transmit Data. If it is not used, leave it unconnected. RXB 25 I UART channel B Receive Data. Normal receive data input must idle at logic 1 condi- tion. If it is not used, tie it to VCC or pull it high via a 100k ohm resistor. RTSB# 23 O UART channel B Request-to-Send (active low) or general purpose output. If it is not used, leave it unconnected. CTSB# 28 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# 27 O UART channel B Data-Terminal-Ready (active low) or general purpose output. If it is not used, leave it unconnected. DSRB# 29 I UART channel B 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. CDB# 30 I UART channel B 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. RIB# 31 I UART channel B 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. ANCILLARY SIGNALS XTAL1 11 I Crystal or external clock input. XTAL2 13 O Crystal or buffered clock output. RESET 21 I Reset (active high) - A longer than 40 ns logic 1 pulse on this pin will reset the internal registers and all outputs. The UART transmitter output will be held at logic 1, the receiver input will be ignored and outputs are reset during reset period (see External Reset Conditions). VCC 44, 33 Pwr 3.3V to 5V power supply. All inputs are 5V tolerant for devices with top marking of "A2 YYWW" and newer. GND 22, 12 Pwr Power supply common, ground. Pin Description NAME 44-PLCC PIN # TYPE DESCRIPTION |
同様の部品番号 - ST16C2552_06 |
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同様の説明 - ST16C2552_06 |
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