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2 POWER SUPPLY
S1C33L03 PRODUCT PART EPSON A-13
A-1
A-2
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
V
DDE voltage is used as high level and the VSS voltage as low level.
Normally, supply the same voltage level as V
DD. 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 V
DDE:
V
DDE = 1.8 V to 5.5 V (VSS = GND)
Notes:•The S1C33L03 has 4 V
DDE 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 V
DD.
•The interface voltage level of the DSIO, P10, P11, P12, P13 and P14 pins is V
DD.
2.4 Power 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 AV
DDE pin is used to supply an analog power voltage
and the V
SS pin is used as the analog ground.
Supply the same voltage level as the V
DDE to the AVDDE pin.
AV
DDE = VDDE, VSS = GND
Note: Be sure to supply V
DDE 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.