Applications Information

The proper use of bypass capacitors reduces noise generated by the IC into the ground plane. The Pin Description table indicates which pins should be connected to bypass capacitors, and the appropriate ground plane.

It is recommended that one instance of a bypass capacitor should be connected to each pin/ball of the IC package. For example, if the pin description table shows four device pins associated with voltage supply A, a separate capacitor should be connected to each pin for a total of four capacitors.

Capacitors should be placed as close as possible to their corresponding device pins. Pins which recommend more than one value of capacitor per pin should place them in parallel with the lowest value capacitor first, closest to the pin.

The device automatically tests the bootloader stimulus pins on any reset. If the stimulus pins are in the states shown in Table 6, the device activates the bootloader and waits for the host to initiate communication. Once the bootloader is activated, the stimulus pins can be changed to any state. The bootloader is deactivated by performing another reset with the stimulus pins in their inactive state.