Epson S1D13705 technical manual Memory, Offset Bit, Vertical Size Bit

Page 64	Epson Research and Development
	Vancouver Design Center

REG[11h] Memory Address Offset Register
Address = 1FFF1h							Read/Write
Memory	Memory	Memory	Memory	Memory	Memory	Memory	Memory
Address	Address	Address	Address	Address	Address	Address	Address
Offset Bit 7	Offset Bit 6	Offset Bit 5	Offset Bit 4	Offset Bit 3	Offset Bit 2	Offset Bit 1	Offset Bit 0
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[12h] Screen 1 Vertical Size Register (LSB)
Address = 1FFF2h							Read/Write
Screen 1	Screen 1	Screen 1	Screen 1	Screen 1	Screen 1	Screen 1	Screen 1
Vertical Size	Vertical Size	Vertical Size	Vertical Size	Vertical Size	Vertical Size	Vertical Size	Vertical Size
Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
REG[13h] Screen 1 Vertical Size Register (MSB)
Address = 1FFF3h							Read/Write
						Screen 1	Screen 1
n/a	n/a	n/a	n/a	n/a	n/a	Vertical Size	Vertical Size
						Bit 9	Bit 8

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.

S1D13705	Hardware Functional Specification
X27A-A-001-10	Issue Date: 02/02/01