SSD1858 Solomon Systech, SSD1858 Datasheet - Page 35

• Manufacturer Part Number: SSD1858
• Description: LCD Segment / Common Driver
• Manufacturer: Solomon Systech

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For 4 FRC,
For 3 FRC,
SSD1858
1
1
8.27 Status register Read
8.28 Set Gray Scale Mode (White/Light Gray/Dark Gray/Black)
8.29 Set PWM and FRC
EXTENDED COMMANDS
These commands are used, in addition to basic commands, to trigger the enhanced features, on top of
general ones, designed for the chip.
st
st
Byte
Byte
0
0
1
1
0
0
1
1
Memory Content
Memory Content
This command is issued by setting D/C# Low during a data read (refer to Figure 14 and Figure
16 parallel interface waveform). It allows the MCU to monitor the internal status of the chip. No
status read is provided for serial mode.
Command 84(hex) to 8F(hex) are used to specify the four gray levels’ pulse width at the four
possible frames. The four gray levels are called white, light gray, dark gray and black. Each
level is defined by 4 registers for 4 consecutive frames. For example, WA is a 4-bit register to
define the pulse width of the 1
mode etc. Each command specifies two registers.
This command selects the number of frames in frame rate control, or the number of levels in the
pulse width modulation.
2
2
Rev 1.1
09/2002
nd
nd
0
1
0
1
0
1
0
1
Byte
Byte
Gray Mode
Gray Mode
Light Gray
Dark Gray
Light Gray
Dark Gray
White
White
Black
Black
st
frame in White mode. WB is a register for 2
WA
WA
DA
BA
DA
BA
1
LA
1
LA
st
st
WB
WB
2
DB
BB
2
DB
BB
LB
LB
nd
nd
FRAME
FRAME
WC
WC
DC
BC
DC
BC
3
LC
3
LC
rd
rd
nd
frame in White
4
th
WD (XX)
SOLOMON
DC (XX)
BC (XX)
LD (XX)
(No use)
WD
DD
BD
LD
4
th
30