C167CS datasheet(188/517 Pages) INFINEON

188 / 517 page

C167CS

Derivatives

Dedicated Pins

User’s Manual

8-4

V2.0, 2000-07

The Reset Output RSTOUT provides a special reset signal for external circuitry.

RSTOUT is activated at the beginning of the reset sequence, triggered via RSTIN, a

watchdog timer overflow or by the SRST instruction. RSTOUT remains active (low) until

the EINIT instruction is executed. This allows to initialize the controller before the

external circuitry is activated.

Note: During emulation mode pin RSTOUT is used as an input and therefore must be

driven by the external circuitry.

The Power Supply pins for the Analog/Digital Converter VAREF and VAGND

provide a separate power supply (reference voltage) for the on-chip ADC. This reduces

the noise that is coupled to the analog input signals from the digital logic sections and so

improves the stability of the conversion results, when VAREF and VAGND are properly

discoupled from VDD and VSS.

The Power Supply pins VDD and VSS provide the power supply for the digital logic of

the C167CS. The respective VDD/VSS pairs should be decoupled as close to the pins

as possible. For best results it is recommended to implement two-level decoupling, e.g.

(the widely used) 100 nF in parallel with 30 … 40 pF capacitors which deliver the peak

currents.

Note: All VDD pins and all VSS pins must be connected to the power supply and ground,

respectively.

C167CS Datasheet(PDF) 188 Page - Infineon Technologies AG