PIN DESCRIPTION
5.2. Pin Functions
5.2.1. Power supply
Pin Name
V
DD
V
SS
Function
2.7 to 5.5V supply.
This may be the same supply as the controlling microprocessor.
Ground
Note:
The peak supply current drawn by the S1D13305 series may be up to ten times the average supply current. The power
supply impedance must be kept as low as possible by ensuring that supply lines are sufficiently wide and by placing 0.47
µF
decoupling capacitors that have good high-frequency response near the device’s supply pins.
5.2.2. Oscillator
Pin Name
XG
XD
Function
Crystal connection for internal oscillator (See section 13). This pin can be driven by an external
clock source that satisfies the timing specifications of the EXT
φ0
signal (See section 6.3.6).
Crystal connection for internal oscillator. Leave this pin open when using an external clock
source.
5.2.3. Microprocessor interface
Pin Name
D0 to D7
Function
Tristate input/output pins. Connect these pins to an 8- or 16-bit microprocessor bus.
Microprocessor interface select pin. The S1D13305 series supports both 8080 family
processors (such as the 8085 and Z80®) and 6800 family processors (such as the 6802
and 6809).
SEL1
0
1
SEL2*
0
0
Interface
8080 family
6800 family
A0
A0
A0
RD
RD
E
WR
WR
R/W
CS
CS
CS
SEL1, SEL2
Note:
SEL1 should be tied directly to V
DD
or V
SS
to prevent noise. If noise does appear on SEL1, decouple it to ground using a
capacitor placed as close to the pin as possible.
S1D13305 Series
Technical Manual
EPSON
5
EPSON [ EPSON COMPANY ]
