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SAB-C501G-1RP Datasheet(PDF) 8 Page - Siemens Semiconductor Group |
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SAB-C501G-1RP Datasheet(HTML) 8 Page - Siemens Semiconductor Group |
8 / 48 page C501 Semiconductor Group 8 1997-04-01 Table 1 Pin Definitions and Functions Symbol Pin Number I/O*) Function P-LCC-44 P-DIP-40 P-MQFP-44 P1.0 – P1.7 2–9 2 3 1–8 1 2 40–44, 1–3, 40 41 I/O Port 1 is a quasi-bidirectional I/O port with internal pull-up resistors. Port 1 pins that have 1s written to them are pulled high by the internal pullup resistors, and in that state can be used as inputs. As inputs, port 1 pins being externally pulled low will source current ( I IL, in the DC character- istics) because of the internal pull-up resistors. Port 1 also contains the timer 2 pins as secondary function. The output latch corresponding to a secondary function must be pro-grammed to a one (1) for that function to operate. The secondary functions are assigned to the pins of port 1, as follows: P1.0 T2 Input to counter 2 P1.1 T2EX Capture - Reload trigger of timer 2 / Up-Down count *) I = Input O = Output |
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