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Page 58 Epson Research and Development
Vancouver Design Center
S1D13705 Hardware Functional Specification
X27A-A-001-10 Issue Date: 02/02/01
bit 4 Input Clock Divide
When this bit = 0, the Operating Clock(CLK) is the same as the Input Clock (CLKI).
When this bit = 1, CLK = CLKI/2.
In landscape mode PCLK=CLK and MCLK is selected as per Table 8-3: “High Perfor-
mance Selection”.
In SwivelView mode, MCLK and PCLK are derived from CLK as shown in Table 8-8:
“Selection of PCLK and MCLK in SwivelView Mode,” on page 68.
bit 3 Display Blank
This bit blanks the display image. When this bit = 1, the display is blanked (FPDAT lines
to the panel are driven low). When this bit = 0, the display is enabled.
bit 2 Frame Repeat (EL support)
This feature is used to improve Frame Rate Modulation of EL panels. When this bit = 1,
an internal frame counter runs from 0 to 3FFFFh. When the frame counter rolls over, the
modulated image pattern is repeated (every 1 hour when the frame rate is 72Hz). When
this bit = 0, the modulated image pattern is never repeated.
bit 1 Hardware Video Invert Enable
In passive panel modes (REG[01h] bit 7 = 0) FPDAT11 is available as either GPIO4 or
hardware video invert. When this bit = 1, Hardware Video Invert is enabled via the
FPDAT11 pin. When this bit = 0, FPDAT11 operates as GPIO4. See Table 8-4: “Inverse
Video Mode Select Options” below.
Note
Video data is inverted after the Look-Up Table.
bit 0 Software Video Invert
When this bit = 1, Inverse Video Mode is selected. When this bit = 0, Standard Video
Mode is selected. See Table 8-4: “Inverse Video Mode Select Options” below.
Note
Video data is inverted after the Look-Up Table.
Table 8-4: Inverse Video Mode Select Options
Hardware Video
Invert Enable
Software Video Invert
(Passive and Active
Panels)
FPDAT11
(Passive Panels Only)
Video Data
00 XNormal
01 XInverse
1X 0Normal
1X 1Inverse