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Q67120-C452 Datasheet(PDF) 7 Page - Siemens Semiconductor Group |
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Q67120-C452 Datasheet(HTML) 7 Page - Siemens Semiconductor Group |
7 / 61 page SAB 80C517/80C537 Semiconductor Group 6 Pin Definitions and Functions Symbol Pin Number I/O *) Function P-LCC-84 P-MQFP-100-2 P4.0 – P4.7 1– 3, 5 – 9 64 - 66, 68 - 72 I/O Port 4 is a bidirectional I/O port with internal pull-up resistors. Port 4 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 4 pins being externally pulled low will source current (IIL, in the DC characteristics) because of the internal pull-up resistors. This port also serves alternate compare functions. The secondary functions are assigned to the pins of port 4 as follows: – CM0 (P4.0): Compare Channel 0 – CM1 (P4.1): Compare Channel 1 – CM2 (P4.2): Compare Channel 2 – CM3 (P4.3): Compare Channel 3 – CM4 (P4.4): Compare Channel 4 – CM5 (P4.5): Compare Channel 5 – CM6 (P4.6): Compare Channel 6 – CM7 (P4.7): Compare Channel 7 PE/SWD 4 67 I Power saving modes enable/ Start Watchdog Timer A low level on this pin allows the software to enter the power down, idle and slow down mode. In case the low level is also seen during reset, the watchdog timer function is off on default. Use of the software controlled power saving modes is blocked, when this pin is held on high level. A high level during reset performs an automatic start of the watchdog timer immediately after reset. When left unconnected this pin is pulled high by a weak internal pull-up resistor. * I = Input O = Output |
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