Lcd Drive Pin Functions - Renesas F-ZTAT H8 Series Hardware Manual

13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.3

LCD Drive Pin Functions

Common/Segment Output Switching
Among the LCD controller's LCD drive outputs, COM9 to COM32 and SEG64 to SEG41 are
switched according to the display duty and display mode.
The display duty is set by control register 1 (LR0) bits DDTY1 and DDTY0, and the display mode
by bit SOB.
(1) When SOB = 0 (character display mode)
• 1/8 duty (DDTY1 = 1)
Common outputs:
Segment outputs:
Note: COM9/SEG64 to COM16/SEG57 output common signal non-selection waveforms,
COM17/SEG56 to COM24/SEG49 output the same waveforms as COM1 to COM8, and
COM25/SEG48 to COM32/SEG41 output common signal non-selection waveforms.
• 1/16 duty (DDTY1 = 0, DDTY0 = 1)
Common outputs:
Segment outputs:
Note: COM17/SEG56 to COM32/SEG41 output the same waveforms as COM1 to COM16.
• 1/32 duty (DDTY1 = 0, DDTY0 = 0)
Common outputs:
Segment outputs:
(2) When SOB = 1 (graphic display mode)
• 1/8 duty (DDTY1 = 1)
Common outputs:
Segment outputs:
• 1/16 duty (DDTY1 = 0, DDTY0 = 1)
Common outputs:
Segment outputs:
• 1/32 duty (DDTY1 = 0, DDTY0 = 0)
Common outputs:
Segment outputs:
Rev.3.00 Jul. 19, 2007 page 346 of 532
REJ09B0397-0300
COM1 to COM8
SEG1 to SEG40
COM1 to COM16
SEG1 to SEG40
COM1 to COM32
SEG1 to SEG40
COM1 to COM8
SEG1 to SEG64
COM1 to COM16
SEG1 to SEG56
COM1 to COM32
SEG1 to SEG40