SSD1809T View Datasheet(PDF) - Solomon Systech

Part Name

Description

Manufacturer

SSD1809T

LCD Segment / Common Driver With Controller

Solomon Systech  

AC ELECTRICAL CHARACTERISTICS (Voltage Referenced to VSS, VDD=2.2 to 3.5V, TA=25°C; unless otherwise specified.)

Symbol

Parameter

Test Condition

FOSC Oscillation Frequency of Display timing Resistor between OSC1 andOSC2 is 900k W

generator

Internal Oscillator Enabled

FFRM

Frame Frequency in Graphic / Charac- Normal Display Frequency

ter Display Mode

Half Display Frequency

Min

Typ

Max

Unit

-

50

-

kHz

Fosc / [2 x Mux Ratio x (Frame Freq Register + 1)]

Fosc / [4 x Mux Ratio x (Frame Freq Register + 1)]

Frame Frequency in Low Power Icon

Mode

Icon Mode A and Normal Display Frequency

Icon Mode B and Normal Display Frequency

Icon Mode C and Normal Display Frequency

Icon Mode D and Normal Display Frequency

OSC

Icon Mode A and Half Display Frequency

Icon Mode B and Half Display Frequency

Icon Mode C and Half Display Frequency

Icon Mode D and Half Display Frequency

Internal Oscillation Frequency with dif- Internal Oscillator Enabled, VDD within oper-

ferent value of feedback resistor

ation range

Fosc / [48 x (Frame Freq Register + 1)]

Fosc / [64 x (Frame Freq Register + 1)]

Fosc / [96 x (Frame Freq Register + 1)]

Fosc / [144 x (Frame Freq Register + 1)]

Fosc / [96 x (Frame Freq Register +1)]

Fosc / [128 x (Frame Freq Register + 1)]

Fosc / [192 x (Frame Freq Register + 1)]

Fosc / [288 x (Frame Freq Register + 1)]

See Figure 1 for the relationship

280k

260k

80k

60k

Oscillation

Frequency 40k

(Hz)

20k

0

500k

1.0M

1.5M

2.0M

Resistor Value between OSC1 and OSC2 (Ω)

Figure 1 : Internal Oscillator Frequency Relationship with External Resistor Value at VDD = 3V

SOLOMON

REV 1.3 SSD1809

03/02

7

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