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SAF-C509-LM Datasheet(PDF) 10 Page - Infineon Technologies AG |
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SAF-C509-LM Datasheet(HTML) 10 Page - Infineon Technologies AG |
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10 / 74 page  Semiconductor Group 9 09.96 C509-L OWE 45 I 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 pullup resistor. 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. P6.0 - P6.7 46-50, 54-56 46 47 48 49 I/O Port 6 is an 8-bit quasi-bidirectional I/O port with internal pullup resistors. Port 6 pins that have 1's written to them are pulled high by the internal pullup resistors, and in that state can be used as inputs. As inputs, port 6 pins being externally pulled low will source current (I IL, in the DC characteristics) because of the internal pullup resistors. Port 6 can also be switched into a bidirectional mode, in which CMOS levels are provided. In this bidirectional mode, each port 6 pin can be programmed individually as input or output. Port 6 also contains the external A/D converter control pin, the receive and transmission lines for the serial port 1, and the write-FLASH control signal. The output latch corresponding to a secondary function must be programmed to a one (1) for that function to operate. The secondary functions are assigned to the pins of port 6 as follows : P6.0 ADST External A/D converter start pin P6.1 R ×D1 Receiver data input of serial interface 1 P6.2 T ×D1 Transmitter data output of serial interface 1 P6.3 WRF The WRF (write Flash) signal is active when the programming mode is selected. In this mode WRF becomes active when executing external data memory write (MOVX) instructions. *) I = Input O = Output Table 1 Pin Definitions and Functions (cont’d) Symbol Pin Number I/O*) Function |
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