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ST16C2450CJ44 데이터시트(PDF) 3 Page - Exar Corporation |
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ST16C2450CJ44 데이터시트(HTML) 3 Page - Exar Corporation |
3 / 29 page áç áç áç áç ST16C2450 REV. 4.0.0 2.97V TO 5.5V DUART 3 PIN DESCRIPTIONS ORDERING INFORMATION PART NUMBER PACKAGE OPERATING TEMPERATURE RANGE DEVICE STATUS ST16C2450CP40 40-Lead PDIP 0°C to +70°C Active. See the ST16C2450CQ48 for new designs. ST16C2450CJ44 44-Lead PLCC 0°C to +70°C Active ST16C2450CQ48 48-Lead TQFP 0°C to +70°C Active ST16C2450IP40 40-Lead PDIP -40°C to +85°C Active. See the ST16C2450IQ48 for new designs. ST16C2450IJ44 44-Lead PLCC -40°C to +85°C Active ST16C2450IQ48 48-Lead TQFP -40°C to +85°C Active Pin Description NAME 44-PLCC PIN # 48-TQFP PIN # TYPE DESCRIPTION DATA BUS INTERFACE A2 A1 A0 29 30 31 26 27 28 I Address data lines [2:0]. These 3 address lines select one of the inter- nal registers in UART channel A/B during a data bus transaction. D7 D6 D5 D4 D3 D2 D1 D0 9 8 7 6 5 4 3 2 3 2 1 48 47 46 45 44 IO Data bus lines [7:0] (bidirectional). IOR# 24 19 I Input/Output Read Strobe (active low). The falling edge instigates an internal read cycle and retrieves the data byte from an internal register pointed to by the address lines [A2:A0]. The data byte is placed on the data bus to allow the host processor to read it on the rising edge. IOW# 20 15 I Input/Output Write Strobe (active low). The falling edge instigates an internal write cycle and the rising edge transfers the data byte on the data bus to an internal register pointed by the address lines. CSA# 16 10 I UART channel A select (active low) to enable UART channel A in the device for data bus operation. CSB# 17 11 I UART channel B select (active low) to enable UART channel B in the device for data bus operation. INTA 33 30 O UART channel A Interrupt output. 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 (default). |
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