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ST16C580CQ48 датащи(PDF) 6 Page - Exar Corporation |
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ST16C580CQ48 датащи(HTML) 6 Page - Exar Corporation |
6 / 39 page ST16C580 6 Rev. 1.22 -RI 41 I Ring Indicator (active low) - A logic 0 on this pin indicates the modem has received a ringing signal from the telephone line. A logic 1 transition on this input pin will generate an interrupt. -RTS 32 O Request to Send (active low) - A logic 0 on the -RTS pin indicates the transmitter has data ready and waiting to send. Writing a logic 1 in the modem control register (MCR bit-1) will set this pin to a logic 0 indicating data is available. After a reset this pin will be set to a logic 1. This pin only affects the transmit and receive operations when Auto RTS func- tion is enabled via the Enhanced Feature Register (EFR) bit-6, for hardware flow control operation. RX / IRRX 7 I Receive Data - This pin provides the serial receive data input to the 580. Two user selectable interface options are avail- able. The first option supports the standard modem interface. The second option provides an Infrared decoder interface, see figures 2/3. When using the standard modem interface, the RX signal will be a logic 1 during reset, idle (no data), or when the transmitter is disabled. The inactive state (no data) for the Infrared decoder interface is a logic 0. MCR bit-6 selects the standard modem or infrared interface. During the local loop- back mode, the RX input pin is disabled and TX data is internally connected to the UART RX Input, internally, see figure 12. TX/IRTX 8 O Transmit Data - This pin provides the serial transmit data from the 580. Two user selectable interface options are available. The first user option supports a standard modem interface. The second option provides an Infrared encoder interface, see figures 2/3. When using the standard modem interface, the TX signal will be a logic 1 during reset, idle (no data), or when the transmitter is disabled. The inactive state (no data) for the Infrared encoder/ decoder interface is a Logic 0. MCR bit-6 selects the standard modem or infrared interface. During the local loop-back mode, the TX input pin is disabled and TX data is internally connected to the UART RX Input, see figure 12. SYMBOL DESCRIPTION Symbol Pin Signal Pin Description 48 type |
Аналогичный номер детали - ST16C580CQ48 |
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Аналогичное описание - ST16C580CQ48 |
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