Pin Functions; Power Supply Pins; Oscillator And Clock Input Pins - Epson S1D13700 User's & Technical Manual

2.2

Pin Functions

2.2.1

Power Supply Pins

Pin Name
HIOVDD
NIOVDD
COREVDD
V
SS
Note 1: Because the spike power supply current in the S1D13700 could reach levels that are several
tens higher than the average amount of dynamically consumed current, measures must be
taken to minimize the power supply impedance of the S1D13700. For example, use thick
power supply wiring from the power supply to the S1D13700 or insert a capacitor of 0.47 mF or
more (with good frequency characteristics) between V
These measures will help to reduce power supply impedance.
2.2.2

Oscillator and Clock Input Pins

CLKI
XCG1
XCD1
CNF0
CNF1
Note 2: Because the external clock fed in from the CLKI pin is needed to internally generate the
fundamental timing in the S1D13700, the oscillation characteristic requirements given in
Section 5.4.3 "External Clock Input Characteristics" on page 92 must be met.
S1D13700 Technical Manual
Power supply for host interface I/O drive. Connect a 5 V or 3.3 V power supply to this pin. (Shared
with MPU power supply pin, V
Power supply for LCD I/O drive other than host of interface I/O. Connect a 5 V or 3.3 V power supply
to this pin.
Power supply for internal logic. Connect a 3.3 V power supply to this pin.
Connects to 0 V earth ground (GND).
Generally used as the input clock source for the bus and memory clocks.
These pins are used to connect a crystal resonator for the internal clock-generating oscillator. For
details, see Section 4.2 "Oscillator Circuit" on page 70. To use the external clock (fed in from the
CLKI pin), fix XCG1 for input with a pullup resistor and leave XCD1 open.
Input, active low
Set the frequency divide ratio of the display clock (pixel clock) relative to CLKI or an internally gener-
ated system clock.
CNF3 CNF2
0
0
1
1
Function
)
CC
Clock Retio
0 1/4
1 1/8
0 1/16
1 Not USE
EPSON
and V close to the S1D13700.
DD SS
2: PINS
Note 1
Note 1
Note 1
Note 2
9