SSD1325 Solomon Systech, SSD1325 Datasheet - Page 14

• Manufacturer Part Number: SSD1325
• Description: OLED/PLED Driver
• Manufacturer: Solomon Systech

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Oscillator Circuit and Display Time Generator
This module is an On-Chip low power RC oscillator circuitry (Figure 4). The oscillator generates the clock
for the Display Timing Generator.
Current Control and Voltage Control
This block is used to derive the incoming power sources into the different levels of internal use voltage
and current. V
driving voltage for segments and commons. I
Segment Drivers/Common Drivers
Segment drivers deliver 128 current sources to drive OLED panel. The driving current can be adjusted
from 0 to 300uA with 128 steps. Common drivers generate voltage scanning pulse.
Graphic Display Data RAM (GDDRAM)
The GDDRAM is a bit mapped static RAM holding the bit pattern to be displayed. The size of the RAM is
128x80x4 bits. For mechanical flexibility, re-mapping on both Segment and Common outputs can be
selected by software. (Refer to Table 3-7 for GDDRAM address map description)
Table 4 – GDDRAM address map showing Horizontal Address Increment A[2]=0, Column Address Re-map A[0]=0, Nibble
(Display Startline=0)
Solomon Systech
Outputs
COM78
COM79
COM0
COM1
CL
COM
|
Re-map A[1]=0, COM Re-map A[4]=0, and Display Start Line=00H (Data byte sequence: D0, D1, … , D5118, D5119)
Address
(HEX)
Row
4E
00
01
4F
|
CC
Oscillator
and V
D4992[3:0] D4992[7:4] D4993[3:0] D4993[7:4]
D5056[3:0] D5056[7:4] D5057[3:0] D5057[7:4]
Internal
D64[3:0]
D0[3:0]
SEG0
DD
00
are external power supplies. V
D64[7:4]
D0[7:4]
SEG1
D65[3:0]
D1[3:0]
SEG2
M
U
X
01
Figure 4 - Oscillator Circuit
CLK
D65[7:4]
D1[7:4]
SEG3
REF
is a reference current source for segment current drivers.
|
Divider
REF
D5054[3:0] D5054[7:4] D5055[3:0] D5055[7:4]
D5118[3:0] D5118[7:4] D5119[3:0] D5119[7:4]
D126[3:0]
SEG124
D62[3:0]
is reference voltage, which is used to derive
Aug 2005
3E
D126[7:4]
SEG125
D62[7:4]
DCLK
Internal
Display
Clock
P 14/53 Rev 1.2
D127[3:0]
SEG126
D63[3:0]
3F
D127[7:4]
SEG127
D63[7:4]
Column Address
SEG Outputs
(HEX)
SSD1325