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SAB-C517A Datasheet(PDF) 11 Page - Infineon Technologies AG |
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SAB-C517A Datasheet(HTML) 11 Page - Infineon Technologies AG |
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11 / 72 page  Semiconductor Group 9 C517A HWPD 36 60 I Hardware Power Down A low level on this pin for the duration of one machine cycle while the oscillator is running resets the C517A. A low level for a longer period will force the part into hardware power down mode with the pins floating. There is no internal pullup resistor connected to this pin. P5.0 - P5.7 44 - 37 68 - 61 I/O Port 5 is a quasi-bidirectional I/O port with internal pull-up resistors. Port 5 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 5 pins being externally pulled low will source current (IIL, in the DC characteristics) because of the internal pull-up resistors. This port also serves the alternate function "Concurrent Compare" and "Set/Reset Compare". The secondary functions are assigned to the port 5 pins as follows: CCM0 to CCM7 P5.0 to P5.7 : concurrent compare or Set/Reset lines OWE 4569I Oscillator Watchdog Enable A high level on this pin enables the oscillator watchdog. When left unconnected this pin is pulled high by a weak internal pull-up resisitor. The logic level at OWE should not be changed during normal operation. When held at low level the oscillator watchdog function is turned off. During hardware power down the pullup resistor is switched off. *) I = Input O = Output Table 1 Pin Definitions and Functions (cont’d) 6\PERO 3LQ1XPEHU ,2 )XQFWLRQ 304)3 3/&& |
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