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Page 64 Epson Research and Development
Vancouver Design Center
S1D13705 Hardware Functional Specification
X27A-A-001-10 Issue Date: 02/02/01
bits 7-0 Memory Address Offset Bits [7:0] (Landscape Modes Only)
This register is used to create a virtual image by setting a word offset between the last
address of one line and the first address of the following line. If this register is not equal to
zero, then a virtual image is formed. The displayed image is a window into the larger vir-
tual image. See Figure 8-1: “Screen-Register Relationship, Split Screen,” on page 65.
This register has no effect in SwivelView modes. See “REG[1Ch] Line Byte Count Regis-
ter for SwivelView Mode” on page 68.
.
REG[13h] bits 1-0 Screen 1 Vertical Size Bits [9:0]
REG[12h] bits 7-0 This register is used to implement the Split Screen feature of the S1D13705. These bits
determine the height (in lines) of Screen 1.
In landscape modes, if this register is programmed with a value, n, where n is less than the
Vertical Panel Size (REG[06h], REG[05h]), then lines 0 to n of the panel contain Screen 1
and lines n+1 to REG[06h], REG[05h] of the panel contain Screen 2. See Figure 8-1:
“Screen-Register Relationship, Split Screen,” on page 65. If Split Screen is not desired,
this register must be programmed greater than, or equal to the Vertical Panel Size,
REG[06h] and REG[05h].
In SwivelView modes this register must be programmed greater than, or equal to the Verti-
cal Panel Size, REG[06h] and REG[05h]. See “SwivelView™” on page 77.
REG[11h] Memory Address Offset Register
Address = 1FFF1h Read/Write
Memory
Address
Offset Bit 7
Memory
Address
Offset Bit 6
Memory
Address
Offset Bit 5
Memory
Address
Offset Bit 4
Memory
Address
Offset Bit 3
Memory
Address
Offset Bit 2
Memory
Address
Offset Bit 1
Memory
Address
Offset Bit 0
REG[12h] Screen 1 Vertical Size Register (LSB)
Address = 1FFF2h Read/Write
Screen 1
Vertical Size
Bit 7
Screen 1
Vertical Size
Bit 6
Screen 1
Vertical Size
Bit 5
Screen 1
Vertical Size
Bit 4
Screen 1
Vertical Size
Bit 3
Screen 1
Vertical Size
Bit 2
Screen 1
Vertical Size
Bit 1
Screen 1
Vertical Size
Bit 0
REG[13h] Screen 1 Vertical Size Register (MSB)
Address = 1FFF3h Read/Write
n/a n/a n/a n/a n/a n/a
Screen 1
Vertical Size
Bit 9
Screen 1
Vertical Size
Bit 8