SSD1821 Solomon Systech, SSD1821 Datasheet - Page 21

• Manufacturer Part Number: SSD1821
• Description: (SSD1820A / SSD1821) LCD Segment / Common Driver
• Manufacturer: Solomon Systech

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SOLOMON
tional Description.
always be in write mode. GDDRAM column address pointer will be increased by one automatically after each data write. The address will
be reset to 0 in next data read/write operation is executed when it is 127.
Address Increment Table (Automatic)
to 0 in next data read/write operation is executed when it is 127.
Commands Required for R/W(WR) Actions on RAM
* No need to resend the command again if it is set previously.
The read / write action to the Display Data RAM does not depend on the display mode. This means the user can change the RAM content
whether the target RAM content is being displayed or not.
R /W(WR) Actions on RAMs
Read/Write Data from/to GDDRAM.
To write data to the GDDRAM, input Low to R/W(W R) pin and High to D/ C pin for 6800-series parallel mode. For serial interface, it will
Address Increment is done automatically after data read/write. The column address pointer of GDDRAM is also affected. It will be reset
D/ C
0
0
1
1
R /W(WR)
0
1
0
1
Write Command
Read Status
Read Data
Comment
Write Data
Address Increment
Yes
Yes
No
No
Commands Required
Set GDDRAM Page Address
Set GDDRAM Column Address
Read/Write Data
(1011X
(0001X
(0000X
(X
7
X
6
X
REV 1.4
3
3
3
5
X
X
X
X
01/03
2
2
2
4
X
X
X
X
1
1
1
3
X
X
X
X
0
0
0
2
)*
)*
)*
X
SSD1820A/21
1
X
0
)
21