Epson S1D13503 Series Technical Manual page 52

EPSON
bit 1 Color Mode
When this bit = 1, color display modes are selected. When bit = 0, BW/gray shade display
modes are selected. This bit goes low on RESET. See Table 8-1, "Gray Shade/Color
Mode Selection," on page 39 for details.
bit 0 Line Byte Count Bit 8
This is the MSB of the number of bytes to be fetched per display line minus 1 (see
AUX[02]). This bit only has effect when in either 16 colors/gray shades with 8-bit mem-
ory interface or 256 colors with 16-bit memory interface.
AUX[04] Total Display Line Count Register (LSB) (Vertical Total)
I/O address = 0100b, Read/Write
Total Disp. Total Disp.
Line Count Line Count
Bit 7
bits 7–0 Total Display Line Count Bits [7:0]
These are the 8 LSB of the 10-bit Total Display Line Count and represent the number of
scan lines -1, to a maximum value of 3FFh or 1024 scan lines. In dual panel mode, the
actual number of display lines is twice the programmed value, i.e. to a maximum of 2048
scan lines. Note that the value programmed partially determines the frame period, and
hence affects display duty cycle. Bits 8 and 9 are located in the following register
(AUX[05]).
AUX[05] Total Display Line Count (MSB) and WF Count Register
I/O address = 0101b, Read/Write
WF Count WF Count
Bit 5
bits 7–2 WF Count Bits [5:0]
These bits are used to adjust the WF output signal period. The binary value stored in these
bits represents the number of LP pulses -1 between toggles of the WF output. The power
up reset value of these bits is 0, which causes the WF output to toggle every frame. When
values of 01h to 3Fh are programmed into these bits, the results are WF toggling every
1+n LP pulses, where n is the value programmed. These bits have no effect when 8-bit
single color panel format 1 is selected.
bits 1–0 Total Display Line Count Bits [9:8]
These bits are the two MSB of the Total Display Line Count Register (AUX[04]).
1-42
Total Disp. Total Disp.
Line Count Line Count
Bit 6 Bit 5
WF Count WF Count
Bit 4 Bit 3
Total Disp. Total Disp.
Line Count Line Count
Bit 4 Bit 3
WF Count WF Count
Bit 2 Bit 1
Total Disp. Total Disp.
Line Count Line Count
Bit 2 Bit 1
Total Disp. Total Disp.
Bit 0 Line Count Line Count
Bit 9
S18A-A-011-01
Bit 0
Bit 8