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SAF-C161O-LM3V Datasheet(PDF) 11 Page - Infineon Technologies AG |
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SAF-C161O-LM3V Datasheet(HTML) 11 Page - Infineon Technologies AG |
11 / 66 page C161K C161O Data Sheet 7 V2.0, 2001-01 RSTIN 65 I/O Reset Input with Schmitt-Trigger characteristics. A low level at this pin while the oscillator is running resets the C161K/O. An internal pullup resistor permits power-on reset using only a capacitor connected to VSS. A spike filter suppresses input pulses < 10 ns. Input pulses >100 ns safely pass the filter. The minimum duration for a safe recognition should be 100 ns + 2 CPU clock cycles. In bidirectional reset mode (enabled by setting bit BDRSTEN in register SYSCON) the RSTIN line is internally pulled low for the duration of the internal reset sequence upon any reset (HW, SW, WDT). See note below this table. Note: To let the reset configuration of PORT0 settle a reset duration of ca. 1 ms is recommended. RST OUT 66 O Internal Reset Indication Output. This pin is set to a low level when the part is executing either a hardware-, a software- or a watchdog timer reset. RSTOUT remains low until the EINIT (end of initialization) instruction is executed. NMI 67 I Non-Maskable Interrupt Input. A high to low transition at this pin causes the CPU to vector to the NMI trap routine. When the PWRDN (power down) instruction is executed, the NMI pin must be low in order to force the C161K/O to go into power down mode. If NMI is high, when PWRDN is executed, the part will continue to run in normal mode. If not used, pin NMI should be pulled high externally. P6 P6.0 P6.1 P6.2 P6.3 68 69 IO O O Port 6 is a 4-bit bidirectional I/O port. It is bit-wise programmable for input or output via direction bits. For a pin configured as input, the output driver is put into high- impedance state. Port 6 outputs can be configured as push/ pull or open drain drivers. The Port 6 pins also serve for alternate functions: CS0 Chip Select 0 Output CS1 Chip Select 1 Output 70 71 O O CS2 Chip Select 2 Output CS3 Chip Select 3 Output These chip select outputs are only available in the C161O. Table 2 Pin Definitions and Functions (cont’d) Symbol Pin Num Input Outp. Function |
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