S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 132

• Manufacturer Part Number: S1D13705
• Description: S1d13705 Embedded Memory Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Page 40
7.4 Registers
S1D13705
X27A-G-002-02
REG[0Ch] Screen 1 Start Word Address LSB
REG[0Dh] Screen 1 Start Word Address MSB
REG[0Eh] Screen 1 Start Word Address MSB
REG[1Ch] Line Byte Count Register
REG[1Bh] Portrait Mode Register
Portrait Mode
Enable
bit 15
bit 7
bit 7
n/a
Portrait Mode
Select
bit 14
bit 6
bit 6
n/a
This section describes the registers used to set portrait mode operation.
The Screen 1 Start Address registers must be set correctly for portrait mode. In portrait
mode the Start Address registers form a byte offset, as opposed to a word offset, into
display memory.
The initial required offset is the portrait mode stride (in bytes) less one.
The line byte count register informs the S1D13705 of the stride, in bytes, between two
consecutive lines of display in portrait mode. The Line Byte Count register only affects
portrait mode operation and are ignored when the S1D13705 is in landscape display mode.
The portrait mode register contains several items for portrait mode support.
The first is the Portrait Mode Enable bit. When this bit is “0” the S1D13705 is in landscape
mode and the remainder of the settings in this register as well as the Line Byte Count in
REG[1Ch] are ignored. Set this bit to “1” to enable portrait mode.
n/a
bit 13
bit 5
bit 5
n/a
n/a
bit 12
bit 4
bit 4
n/a
n/a
bit 11
bit 3
bit 3
n/a
Portrait Mode
Memory
Clock Select
bit 10
bit 2
bit 2
n/a
Epson Research and Development
Programming Notes and Examples
Portrait Mode
Pixel Clock
Select Bit 1
bit 1
bit 9
bit 1
n/a
Vancouver Design Center
Issue Date: 01/02/13
Portrait Mode
Pixel Clock
Select Bit 0
bit 16
bit 0
bit 8
bit 0