
Solomon Systech
Jul 2005
P 16/59 Rev 1.1
SSD1339
D
17
-D
0
These pins are 18-bit bi-directional data bus to be connected to the microprocessor’s data bus.
V
DDIO
This pin is a power supply pin of I/O buffer. It should be connected to V
DD
or external source. All I/O signal
should have VIH reference to VDDIO. When I/O signal pins (BS012, M/S, CLS, D0-D17, control
signals…) pull high, they should be connected to VDDIO.
V
DD
Power Supply pin. It must be connected to external source.
V
SS
Ground. It also acts as a reference for the logic pins. It must be connected to external ground.
CL
This pin is the system clock input. When internal clock is enabled, this pin should be left open. Nothing
should be connected to this pin. When internal oscillator is disabled, this pin receives display clock signal
from external clock source.
MS
This pin must be connected to V
DD
to enable the chip.
CLS
This pin is internal clock enable. When this pin is pulled high, internal oscillator is selected.
The internal clock will be disabled when it is pulled low, an external clock source must be connected to
CL pin for normal operation.
VDDB
This is the power supply pin for the internal buffer of the DC-DC voltage converter. It must be connected
to V
DD
when the converter is used. It is also recommended to connect this pin to V
DD
when the converter
is not used to avoid floating node.
VSSB
This is the GND pin for the internal buffer of the DC-DC voltage converter. It must be connected to V
SS
when the converter is used. It is also recommended to connect this pin to V
SS
when the converter is not
used to avoid floating node.
GDR
This output pin drives the gate of the external NMOS of the booster circuit. This pin can be left open
when the converter is not used.
RESE
This pin connects to the source current pin of the external NMOS of the booster circuit. This pin can be
left open when the converter is not used.