Datenblatt-Suchmaschine für elektronische Bauteile |
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ST16C650AIQ48 Datenblatt(PDF) 6 Page - Exar Corporation |
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ST16C650AIQ48 Datenblatt(HTML) 6 Page - Exar Corporation |
6 / 53 page ST16C650A áç áç áç áç 2.90V TO 5.5V UART WITH 32-BYTE FIFO REV. 5.0.0 6 Pin type: I=Input, O=Output, IO= Input/output, OD=Output Open Drain. CD# 384240 I Carrier Detect input or general purpose input (active low) RI# 394341 I Ring Indicator input or general purpose input (active low) ANCILLARY SIGNALS XTAL1 16 18 14 I Crystal or external clock input. Caution: this input is not 5V tolerant. XTAL2 17 19 15 O Crystal or buffered clock output RCLK 9 10 5 I Receiver Clock This input is used as external 16X clock input to the receiver section. Con- nect the BAUDOUT# pin to this input externally. BAUDOUT# 15 17 12 O Baud Rate Generator Output (active low) This pin provides the 16X clock of the selected data rate from the baud rate generator. The RCLK pin must be connected externally to BAUD- OUT# when the receiver is operating at the same data rate. When the PC mode is selected, the baud rate generator clock output is internally connected to the RCLK input. This pin then functions as the LPT-1 printer port decode logic output, see Table 3. SEL - 34 36 I PC Mode Select (active low) When this input is at logic 0, it enables the on-board chip select decode function according to PC ISA bus COM[4:1] and IRQ[4:3] port definitions. See Table 3 for details. This pin has an internal 100k Ω pull-up resistor. DDIS# 23 26 22 O Drive Disable Output This pin goes to a logic 0 whenever the host CPU is reading data from the 650A. It can control the direction of a data bus transceiver between the CPU and 650A or other logic functions. RESET 35 39 35 I Reset Input (active high) A 40 ns minimum active 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. See UART Reset Conditions in Table 13. OP1# 34 38 34 O Output Port 1 General purpose output. OP2# 31 35 31 O Output Port 2 General purpose output. VCC 404442 Pwr 2.90V to 5.5V supply voltage All inputs are 5V tolerant except for XTAL for devices with date code top mark of "HC YYWW" and newer. Devices with date code top mark of "GC YYWW" and older do not have 5V tolerant inputs. GND 202218 Pwr Power supply common ground NC - - 1, 13, 25 - No Connect NAME 40- PDIP PIN # 44- PLCC PIN # 48- TQFP PIN # TYPE DESCRIPTION |
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Ähnliche Beschreibung - ST16C650AIQ48 |
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