SSD1322 SOLOMON SYSTECH, SSD1322 Datasheet - Page 22

• Manufacturer Part Number: SSD1322
• Description: Dot Matrix High Power OLED/PLED Segment/Common Driver
• Manufacturer: SOLOMON SYSTECH

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8.4
This module determines whether the input should be interpreted as data or command based upon the input of
the D/C# pin.
If D/C# pin is HIGH, data is written to Graphic Display Data RAM (GDDRAM). If it is LOW, the inputs at
D0-D7 are interpreted as a Command and it will be decoded and be written to the corresponding command
register.
8.5
This module is an On-Chip low power RC oscillator circuitry (Figure 8-7). The operation clock (CLK) can be
generated either from internal oscillator or external source CL pin by CLS pin. If CLS pin is HIGH, internal
oscillator is selected. If CLS pin is LOW, external clock from CL pin will be used for CLK. The frequency of
internal oscillator F
The display clock (DCLK) for the Display Timing Generator is derived from CLK. The division factor “D”
can be programmed from 1 to 1024 by command B3h.
The frame frequency of display is determined by the following formula:
where
•
•
•
•
If the frame frequency is set too low, flickering may occur. On the other hand, higher frame frequency leads
to higher power consumption on the whole system.
SSD1322
D stands for clock divide ratio. It is set by command B3h A[3:0]. The divide ratio has the range from 1 to
1024.
K is the number of display clocks per row. The value is derived by
K = Phase 1 period + Phase 2 period + X
X = DCLKs in current drive period. Default X = constant + GS15 = 10 +112 = 122
Default K is 9 + 7 + 122 = 138
Number of multiplex ratio is set by command A8h. The reset value is 127 (i.e. 128MUX).
F
results in higher frequency.
osc
Command Decoder
Oscillator & Timing Generator
is the oscillator frequency. It can be changed by command B3h A[7:4]. The higher the register setting
Rev 0.10
CL
OSC
can be programmed by command B3h.
P 22/56 Apr 2008
Oscillator
Internal
Fosc
F
Figure 8-7 : Oscillator Circuit
FRM
=
DCLK = F
D
×
CLS
K
M
U
X
×
OSC
No.
F
CLK
osc
/ D
of
Mux
Divider
Display
Clock
DCLK
Solomon Systech
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