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ST16C452IJ68PS Arkusz danych(PDF) 7 Page - Exar Corporation |
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ST16C452IJ68PS Arkusz danych(HTML) 7 Page - Exar Corporation |
7 / 30 page 7 ST16C452/452PS Rev. 3.20 Symbol Pin Signal Type Pin Description individual UART channels, A through B. A logic 0 on this pin(s) indicates the modem has received a ringing signal from the telephone line(s). A logic 1 transition on this input pin will generate an interrupt for the ringing channel(s). This pin does not have any effect on the transmit or receive operation. -RTS A/B 24,12 O Request to Send (active low) - These outputs are associated with individual UART channels, A through B. A logic 0 on the -RTS pin(s) indicates the transmitter has data ready and waiting to send for the given channel(s). 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 does not have any effect on the transmit or receive operation. RX A/B 41,62 I Receive Data Input, RX A-B. - These inputs are associated with individual serial channel(s) to the 452. The RX signal will be a logic 1 during reset, idle (no data), or when the transmitter is disabled. During the local loop-back mode, the RX input pins are disabled and TX data is internally connected to the UART RX Inputs, internally. TX A/B 26,10 O Transmit Data, TX A-B - These outputs are associated with individual serial transmit channel(s) from the 452/452PS. The TX signal will be a logic 1 during reset, idle (no data), or when the transmitter is disabled. During the local loop- back mode, the TX output pins are disabled and TX data is internally connected to the UART RX Inputs. SYMBOL DESCRIPTION |
Podobny numer części - ST16C452IJ68PS |
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Podobny opis - ST16C452IJ68PS |
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