SSD1811 View Datasheet(PDF) - Solomon Systech
Part Name
Description
Manufacturer
SSD1811 Datasheet PDF : 40 Pages
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11101110
1010110X 0
* * * * * * X1X0
11100011
11110000
1111 * * * *
********
Table 4 Write Command Table (D/C=0, R/W(WR)=0, E(RD)=1)
Set End of Read-Modify-Write Mode
Set Indicator On/Off
Indicator Display Mode,
This second byte command is
required ONLY when “Set Indicator
On” command is sent.
NOP
Test Mode Reset
Set Test Mode
Set Power Save Mode
(Standby or Sleep)
Exit Read-Modify-Write mode. RAM Column address before entering the
mode will be restored. After POR, Read-modify-write mode is OFF.
X0 = 0: indicator off (POR, second command byte is not required)
X0 = 1: indicator on (second command byte required)
X1X0 = 00: indicator off
X1X0 = 01: indicator on and blinking at ~1 second interval
X1X0 = 10: indicator on and blinking at ~1/2 second interval
X1X0 = 11: indicator on constantly
Command result in No Operation
Reserved for IC testing. Do NOT use.
Reserved for IC testing. Do NOT use.
Standby or sleep mode will be entered using compound commands.
Issue compound commands “Set Display Off” followed by “Set Entire Display
On”.
Bit Pattern
10101000
00X5X4X3X 2X1X0
10101001
X7X6X5X4X 3X2X1X0
1010101X 0
Table 5 Extended Command Table
Command
Set Multiplex Ratio
Set Bias Ratio (X1X0)
Set TC Value (X4X3X2)
Modify Osc. Freq. (X 7X 6X5)
Set 1/4 Bias Ratio
Description
To select multiplex ratio N from 2 to the maximum multiplex ratio (POR value)
for each member (including icon line).
Max. mux ratio: SSD1811: 49
SSD1812: 55
SSD1813: 33
SSD1815: 65
N = X5X4X3X 2X1X0 + 2, eg. N = 001111b + 2 = 17
X1X0 =
SSD1811:
SSD1812:
SSD1813:
SSD1815:
00
1/8 or 1/6 (POR)
1/8 or 1/6 (POR)
Prohibited
1/8 or 1/6
01
1/6 or 1/5
1/6 or 1/5
Prohibited
1/6 or 1/5
10
1/9 or 1/7
1/9 or 1/7
1/5 or 1/6 (POR)
1/9 or 1/7 (POR)
11
Prohibited
Prohibited
Prohibited
Prohibited
X4X3X2 = 000: -0.01%/ºC (TC0, POR)
X4X3X2 = 010: -0.10%/ºC (TC2)
X4X3X2 = 100: -0.18%/ºC (TC4)
X4X3X2 = 111: -0.25%/ºC (TC7)
X4X3X2 = 001, 011, 101, 110: Reserved
Increase the value of X7X6X5 will increase the oscillator frequency and vice
versa.
Default Mode:
X7X6X5 = 010 (POR for SSD1811, SSD1812, SSD1814) : Typ. 31kHz
X7X6X5 = 011 (POR for SSD1813, SSD1815) : Typ. 17kHz
High Frequency Mode:
X7X6X5 = 110 (For SSD1811, SSD1812, SSD1814) : Typ. 38kHz
X7X6X5 = 110 (For SSD1813, SSD1815) : Typ. 21kHz
X0 = 0: use normal setting (POR)
X0 = 1: fixed at 1/4 bias
SOLOMON
Rev 3.1
08/2001
SSD181X Series
18
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