ST7576 Sitronix Technology, ST7576 Datasheet - Page 24

• Manufacturer Part Number: ST7576
• Description: Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

ST7576
Column Address Circuit
Column Address Circuit has an 8-bit preset counter that provides Column Address to the Display Data RAM as shown in
figure16. The display data RAM column address is specified by the Column Address Set command. The specified column
address is incremented (+1) with each display data read/write command. This allows the MPU display data to be accessed
continuously.
ADDRESSING
Data is downloaded in bytes into the RAM matrix of ST7576. The display RAM has a matrix of 66 by 102 bits. The address
pointer addresses the columns. The address ranges are: X 0 to 101 (1100101),Y 0 to 9 (1001) .Addresses outside these
ranges are not allowed.In vertical addressing mode (V=1) the Y address increments after each byte. After the last Y
address (Y = 8), Y wraps around to 0 and X increments to address the next column.In horizontal addressing mode (V=0)
the X address increments after each byte. After the last X address(X = 101) X wraps around to 0 and Y increments to
address the next row.After the very last address (X = 101, Y = 8) the address pointers wrap around to address (X = 0, Y =0)
Data structure
Ver 1.0
D0
D7
MSB
LSB
1 bit
LSB
0
Fig13 RAM format
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address
X-
w w w . D a t a S h e e t 4 U . c o m
10
1
2007/01/29
0
1
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9