UPD78F1502AGK-GAK-AX Datasheet, PDF (700/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 16 LCD CONTROLLER/DRIVER
Figure 16-13. Common Signal Waveforms (2/2)
(c) 1/3 bias method
COMn
(Three-time slot mode)
TF = 3 × T
COMn
(Four-time slot mode)
TF = 4 × T
VLC0
VLC1
VLC2
VSS
VLCD
VLC0
VLC1
VLC2
VSS
VLCD
T: One LCD clock period
TF: Frame frequency
< Example of calculation of LCD frame frequency (When four-time slot mode is used) >
LCD clock:
32768/2⁸ = 256 Hz (When setting to LCDC0 = 04H)
LCD frame frequency:
64 Hz
COMn
(Eight-time slot mode)
(d) 1/4 bias method
TF = 8 × T
VLC0
VLC1
VLC2
VLC3
VSS
VLCD
T: One LCD clock period
TF: Frame frequency
< Example of calculation of LCD frame frequency (When eight-time slot mode is used) >
LCD clock:
32768/2⁸ = 256 Hz (When setting to LCDC0 = 04H)
LCD frame frequency:
32 Hz
R01UH0004EJ0501 Rev.5.01
684
Jun 20, 2011