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SAB80C517A Datasheet(PDF) 11 Page - Infineon Technologies AG |
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SAB80C517A Datasheet(HTML) 11 Page - Infineon Technologies AG |
11 / 77 page SAB 80C517A/83C517A-5 Semiconductor Group 10 1994-05-01 P1.7 - P1.0 29 - 36 98 - 100, 1, 6 - 9 I/O Port 1 is a bidirectional I/O port with internal pull-up resistors. Port 1 pins that have 1 s written to them are pulled high by the internal pull-up resistors, and in that state can be used as inputs. As inputs, port 1 pins being externally pulled low will source current (IIL, in the DC characteristics) because of the internal pull-up resistors. It is used for the low order address byte during program verification. It also contains the interrupt, timer, clock, capture and compare pins that are used by various options. The output latch must be programmed to a one (1) for that function to operate (except when used for the compare functions). The secondary functions are assigned to the port 1 pins as follows: – INT3/CC0 (P1.0): interrupt 3 input/ compare 0 output /capture 0 input – INT4/CC1 (P1.1): interrupt 4 input / compare 1 output /capture 1 input – INT5/CC2 (P1.2): interrupt 5 input / compare 2 output /capture 2 input – INT6/CC3 (P1.3): interrupt 6 input / compare 3 output /capture 3 input – INT2/CC4 (P1.4): interrupt 2 input / compare 4 output /capture 4 input – T2EX (P1.5): timer 2 external reload trigger input – CLKOUT (P1.6): system clock output – T2 (P1.7): counter 2 input * I = Input O = Output Pin Definitions and Functions (cont’d) Symbol Pin Number I/O *) Function P-LCC-84 P-MQFP-100-2 |
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