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CAM35C44 датащи(PDF) 11 Page - SMSC Corporation |
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CAM35C44 датащи(HTML) 11 Page - SMSC Corporation |
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11 / 50 page ![]() 11 NAME TOTAL PINS SYMBOL BUFFER TYPE DESCRIPTION SERIAL PORT INTERFACE (2) Receive Serial Data 2/ Infrared Rx 3 1 RXD/IRRX I This is the receiver input pin for the UART COM port or an alternate infrared port receiver input. Transmit Serial Data 2/Infrared Tx 1,2 1 TXD/IRTX O12PD This is the transmitter output pin for the UART COM port or an alternate infrared port transmitter output. Note 1 TX and MODE pins drive to VIO level. Note 2 TX defaults to zero even during POR. Note 3 RX pins are voltage tolerant to VIO level. Note 4 All GPIOs are VIO tolerant and back drive protected. Buffer-Type Summary The characteristics of the buffer types shown in TABLE 1 are summarized in TABLE 2. TABLE 2 - CAM35C44 BUFFER-TYPE SUMMARY BUFFER TYPE DESCRIPTION IO12 Input/Output. 12mA sink; 6mA source O12 Output. 12mA sink; 6mA source OD12 Open Drain. 12mA sink O12PD Output. 12mA sink; 6mA source; 30 #A Pulldown @ Tristate ICLK Input to Crystal Oscillator Circuit (TTL levels) OCLK Output to External Crystal I Input TTL Compatible. IP Input TTL Compatible with 30 #A Pullup IS Input with Schmitt Trigger. |
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