各种 LCD GDRAM 格式

NOKIA 5110 < PCD8544 >

https://www.sparkfun.com/datasheets/LCD/Monochrome/Nokia5110.pdf

Data is downloaded in bytes into the 48 by 84 bits RAM data display matrix of PCD8544

The columns are addressed by the address pointer. The address ranges are:

X 0 to 83 (1010011), Y 0 to 5 (101).

Addresses outside these ranges are not allowed.

In the vertical addressing mode (V = 1), the Y address increments after each byte (see Fig.5).
After the last Y address (Y = 5), Y wraps around to 0 and X increments to address the next column.

In the horizontal addressing mode (V = 0), the X address increments after each byte (see Fig.6).
After the last X address (X = 83), X wraps around to 0 and Y increments to address the next row.

After the very last address (X = 83 and Y = 5), the address pointers wrap around to address (X = 0 and Y = 0).