Specifications

7 Mounting

EPSON

S1C33 ASIC DESIGN GUIDE

EMBEDDED ARRAY S1X50000 SERIES

Reset Circuit

• The power-on reset signal which is input to the P_RESETX pin changes depending

on conditions (power rise time, components used, board pattern, etc.). Decide the

time constant of the capacitor and resistor after enough tests have been completed

with the application product.

• In order to prevent any occurrences of unnecessary resetting caused by noise during

operating, components such as capacitors and resistors should be connected to the

P_RESETX pin in the shortest line.

Power Supply Circuit

• Sudden power supply variation due to noise may cause malfunction. Consider the fol-

lowing points to prevent this:

(1) The power supply should be connected to the V

, V

and AV

pins with pat-

terns as short and large as possible.

In particular, the power supply for AV

affects A/D conversion precision.

(2) When connecting between the V

and V

pins with a bypass capacitor, the pins

should be connected as short as possible.

Figure 7.2 Bypass Capacitor Connection Example