2 POWER SUPPLY
2.3 Power Supply for I/O Interface (VDDE)
The VDDE voltage is used for interfacing with external I/O signals. For the output interface of the S1C33L03, the VDDE voltage is used as high level and the VSS voltage as low level.
Normally, supply the same voltage level as VDD. It can be supplied separately from VDD for 5 V interface. The VSS pin is used for the ground common with VDD.
The following voltage is enabled for VDDE:
VDDE = 1.8 V to 5.5 V (VSS = GND)
Notes: • The S1C33L03 has 4 VDDE pins. Be sure to supply a voltage to all the pins. Do not open any of them.
•When an external clock is input to the OSC1 or OSC3 pin, the clock signal level must be VDD.
•The interface voltage level of the DSIO, P10, P11, P12, P13 and P14 pins is VDD.
2.4Power Supply for Analog Circuits (AVDDE)
The analog power supply pin (AVDDE) is provided separately from the VDD and VDDE pins in order that the digital circuits do not affect the analog circuit (A/D converter). The AVDDE pin is used to supply an analog power voltage and the VSS pin is used as the analog ground.
Supply the same voltage level as the VDDE to the AVDDE pin.
AVDDE = VDDE, VSS = GND
Note: Be sure to supply VDDE to the AVDDE pin even if the analog circuit is not used.
Noise on the analog power lines decrease the A/D converting precision, so use a stabilized power supply and make the board pattern with consideration given to that.
S1C33L03 PRODUCT PART | EPSON |