26 LCD CONTROLLER (LCDC)
26-28
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
5.7.1
Table 26.
Monochrome Look-up Table Registers
LUT entry
LUT bit/register
0
MLUT0[3:0]/LCDC_MLUT0
1
MLUT1[3:0]/LCDC_MLUT0
2
MLUT2[3:0]/LCDC_MLUT0
3
MLUT3[3:0]/LCDC_MLUT0
4
MLUT4[3:0]/LCDC_MLUT0
5
MLUT5[3:0]/LCDC_MLUT0
6
MLUT6[3:0]/LCDC_MLUT0
7
MLUT7[3:0]/LCDC_MLUT0
8
MLUT8[3:0]/LCDC_MLUT1
9
MLUT9[3:0]/LCDC_MLUT1
10
MLUT10[3:0]/LCDC_MLUT1
11
MLUT11[3:0]/LCDC_MLUT1
12
MLUT12[3:0]/LCDC_MLUT1
13
MLUT13[3:0]/LCDC_MLUT1
14
MLUT14[3:0]/LCDC_MLUT1
15
MLUT15[3:0]/LCDC_MLUT1
In addition settings shown above, the LCDC reload function can be used to replace the monochrome look-
up table data by the values prepared in the memory. For more information on the LCDC reload function,
see Section 26.9.
Frame Rates
26.5.8
The frame rate is calculated from the LCD panel’s horizontal and vertical total periods, and pixel clock frequency,
as shown below.
f
LCLK
Frame rate = ——————
HT
×
VT
f
LCLK
: Pixel clock frequency
f
LCLK
= OSC3/1 to OSC3/32 (Hz)
see Section 26.4.2, “Setting the LCDC Clock.”
HT: Horizontal total period
HT = (HTCNT[6:0] + 1)
×
8 (Ts)
where Ts = pixel clock period
VT: Vertical total period
VT = VTCNT[9:0] + 1 (lines)
Other Settings
26.5.9
MOD rate
The period during which the MOD signal is switched can be set using the MOD[5:0]/LCDC_MODR register.
MOD = 0x0:
MOD signal switched at a period of the FPFRAME signal (default)
MOD = other than 0x0: Switched at a period of MOD + 1 FPLINE pulses
Repeating of the FRM pattern
This setup item is provided for EL panels. Whether the frame-rate modulation pattern is to be repeated every
0x40000 frames (counted by the internal frame counter) can be set using FRMRPT/LCDC_DISPMOD register.
FRMRPT = 1: FRM pattern repeated (for EL panel)
FRMRPT = 0: FRM pattern not repeated (default)