HD61830 Datasheet, PDF (16/43 Pages) Hitachi Semiconductor – LCDC (LCD Timing Controller)

HD61830/HD61830B
RD0
H_p
RD7
CURA
STA
H_N (digit)
Symbol Name
Meaning
Value
H_p
Horizontal character pitch Horizontal character pitch
6 to 8 dots
H_N
Number of horizontal
Number of horizontal characters per 2 to 128 digits
characters
line (number of digits) in the character (an even number)
mode or number of bytes per line in
the graphic mode
V_p
Vertical character pitch
Vertical character pitch
1 to 16 dots
C_p
Cursor position
Line number on which the cursor
can be displayed
1 to 16 lines
N_X
Number of time divisions Inverse of display duty ratio
1 to 128 lines
Note: If the number of vertical dots on the screen is m, and the number of horizontal dots is n,
1/m = 1/N_X = display duty ratio
n = H_p × H_N,
m/V_p = Number of display lines
C_p ≤ V_p
Figure 2 Display Variables
16