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ST16C654CQ100 データシート(PDF) 8 Page - Exar Corporation |
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ST16C654CQ100 データシート(HTML) 8 Page - Exar Corporation |
8 / 49 page ST16C654/654D 5-72 Rev. 4.10 SYMBOL DESCRIPTION Symbol Pin Signal Pin Description 68 100 64 type ated with the 68 mode only. In the 68 mode, interrupts from UART channels A-D are WIRE-OR’ed” internally to function as a single IRQ interrupt. This pin transitions to a logic 0 (if enabled by the interrupt enable register) whenever a UART channel(s) requires service. Individual channel interrupt status can be determined by addressing each channel through its associated internal register, using -CS and A3- A4. In the 68 mode an external pull-up resistor must be connected between this pin and Vcc. The function of this pin changes to INTA when operating in the 16 mode, see definition under INTA. IRTX A-B - 6,24 - IRTX C-D - 57,75 - O Infrared Transmit Data Output (IrDA) - This function is associated with 100 pin packages only. These pins provide separate infrared IrDA TX outputs for UART channel’s (A- D). The serial infrared IRTX data is transmitted via these pins with added start, stop and parity bits. The IRTX signal will be a logic 0 during reset, idle (no data), or when the transmitter is disabled. MCR bit-6 selects the standard modem or infrared interface. MIDICLK - 42 - I MIDI (Musical Instrument Digital Interface) Clock Input - This function is associated with 100 pin packages only. RXC and TXC can function as MIDI input/output ports when an external MIDI Clock is provided at this pin. External Clock or a crystal is connected to the XTAL1/2 pins for normal operation (see XTAL 1 & 2). -RESET RESET 37 43 27 I Reset. - In the 16 mode a logic 1 on this pin will reset the internal registers and all the outputs. The UART transmitter output and the receiver input will be disabled during reset time. (See ST16C654 External Reset Conditions for initial- ization details.) When 16/-68 is a logic 0 (68 mode), this pin functions similarly but, as an inverted reset interface signal, -RESET. R/-W 18 15 - I Read/Write Strobe (active low) - This function is associated with the 68 mode only. This pin provides the combined |
同様の部品番号 - ST16C654CQ100 |
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同様の説明 - ST16C654CQ100 |
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