bits per dot 

 cell data  

 boundary 

 4 bits / dot 

 32 bytes / cell 

 20H Byte 

 8 bits / dot 

 64 bytes / cell 

 20H Byte 

 16 bits / dot 

 128 bytes / cell 

 20H Byte 

 32 bits / dot 

 256 bytes / cell 

 20H Byte