ssd1322z Newhaven Display International, Inc, ssd1322z Datasheet - Page 20

• Manufacturer Part Number: ssd1322z
• Description: 480 X 128, Dot Matrix High Power Oled/pled Segment/common Driver With Controller
• Manufacturer: Newhaven Display International, Inc

Under serial mode, only write operations are allowed.
8.1.4
The 3-wire serial interface consists of serial clock SCLK, serial data SDIN and CS#.
In 3-wire SPI mode, D0 acts as SCLK, D1 acts as SDIN. For the unused data pins, D2 should be left open.
The pins from D3 to D7, R/W# (WR#), E(RD#) and D/C# can be connected to an external ground.
The operation is similar to 4-wire serial interface while D/C# pin is not used. There are altogether 9-bits will
be shifted into the shift register on every ninth clock in sequence: D/C# bit, D7 to D0 bit. The D/C# bit (first
bit of the sequential data) will determine the following data byte in the shift register is written to the Display
Data RAM (D/C# bit = 1) or the command register (D/C# bit = 0). Under serial mode, only write operations
are allowed.
SSD1322
SCLK(D0)
SDIN(D1)
SDIN/
SCLK
D/C#
SDIN(D1)
CS#
SCLK
(D0)
Function
Write command
Write data
MCU Serial Interface (3-wire SPI)
SDIN/
SCLK
CS#
Rev 0.10
D7
DB1
D/C#
DB1
E(RD#)
Tie LOW
Tie LOW
Figure 8-5 : Write procedure in 4-wire Serial interface mode
Figure 8-6: Write procedure in 3-wire Serial interface mode
P 20/56 Apr 2008
D6
DB2
Table 8-5: Control pins of 3-wire Serial interface
D7
DB2
D5
R/W#(WR#)
Tie LOW
Tie LOW
D6
D4
D5
DBn
CS#
L
L
D3
DBn
D/C#
Tie LOW
Tie LOW
D4
D2
D3
D0
↑
↑
D1
Note
(1)
L stands for LOW in signal
D2
D0
D1
Solomon Systech
D0