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SAB-C504 Datasheet(PDF) 10 Page - Infineon Technologies AG |
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SAB-C504 Datasheet(HTML) 10 Page - Infineon Technologies AG |
10 / 71 page C504 Data Sheet 6 2000-05 P3.0 - P3.7 5, 7 - 13 5 7 8 9 10 11 12 13 I/O Port 3 is an 8-bit bidirectional port. P3.0 (R ×D) and P3.1 (T ×D) operate as defined for the C501. P3.2 to P3.7 contain the external interrupt inputs, timer inputs, and four of the analog inputs of the A/D converter. Port 3 pins are assigned to be used as analog inputs via the bits of SFR P3ANA. P3.6/WR can be assigned as a third interrupt input. The functions are assigned to the pins of port 3 as follows: P3.0 / RxD Receiver data input (asynch.) or data input/output (synch.) of serial interface P3.1 / TxD Transmitter data output (asynch.) or clock output (synch.) of serial interface P3.2 / AN4 / INT0 Analog input channel 4 / external interrupt 0 input / Timer 0 gate control input P3.3 / AN5 / INT1 Analog input channel 5 / external interrupt 1 input / Timer 1 gate control input P3.4 / AN6 / T0 Analog input channel 6 / Timer 0 counter input P3.5 / AN7 / T1 Analog input channel 7 / Timer 1 counter input P3.6 / WR / INT2 WR control output; latches the data byte from port 0 into the external data memory / external interrupt 2 input P3.7 / RD RD control output; enables the external data memory Table 1 Pin Definitions and Functions (cont’d) Symbol Pin Number (P-MQFP-44) I/O 1) Function |
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