AN_6612_007
78M6612 Hardware Design Guidelines
Rev 2
11
5 Basic Configuration
This section describes the configuration of the remaining hardware interfaces found on the 78M6612.
5.1 Reset Circuitry
The 78M6612 employs an active high Reset input pin. Figure 7 shows the external circuit configuration
using a pushbutton switch to generate the reset signal. If an external reset is not required, connect the
Reset pin to GND (GNDD). An external reset is recommended only during the development phase of a
project. It is recommended that the RESET pin be grounded for the production version of the PCB.
GNDD
V3P3D
RESET
1nF
10K
Ω
1K
Ω
Figure 8: Reset Circuitry
GNDD
RESET
Figure 9: Connection for Unused Reset Pin
5.2 V2P5 Voltage Reference Pin
The V2P5 pin is connected to an internal 2.5 VDC reference voltage. Do not attach external circuitry to
this pin. This pin must be left unconnected.
