S1D13700F01A100 Epson, S1D13700F01A100 Datasheet - Page 105

• Manufacturer Part Number: S1D13700F01A100
• Description: Display Drivers LCD CONTROLLER
• Manufacturer: Epson

Specifications of S1D13700F01A100

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: TQFP
• Pin Count: 80
• Mounting: Surface Mount
• Operating Supply Voltage (min): 2.7V
• Lead Free Status / Rohs Status: Supplier Unconfirmed

5: ADVANCED TECHNIQUES
5.3 Split Screen
Registers
2-20
REG[13] Screen 1 Vertical Size (LSB)
REG[14] Screen 1 Vertical Size (MSB)
Bit 7
n/a
Occasionally the need arises to display two different but related images. Take, for example, a game
where the main play area requires rapid updates and game status, displayed at the bottom of the
screen, requires infrequent updates.
The Split Screen feature of the S1D13705 allows a programmer to setup a display in such a manor.
When correctly configured the programmer has only to update the main area on a regular basis.
Occasionally, as the need arises, the secondary area is updated.
The figure below illustrates how a 320 240 panel may be configured to have one image displaying
from scan line 0 to scan line 199 and image 2 displaying from scan line 200 to scan line 239.
Although this example picks specific values, the split between image 1 and image 2 may occur at
any line of the display.
In split screen operation “Image 1" is taken from the display memory location pointed to by the
Screen 1 Start Address registers and is always located at the top of the screen. “Image 2" is taken
from the display memory location pointed to by the Screen 2 Start Address registers. The line where
“Image 1" end and “Image 2" begins is determined by the Screen 1 Vertical Size register.
Split screen operation is performed primarily by manipulating three register sets. Screen 1 Start
Address and Screen 2 Start Address determine from where in display memory the first and second
images will be taken from. The Vertical Size registers determine how many lines Screen 1 will use.
The following is a description of the registers used to do split screen.
Screen 1 Vertical Size
These two registers form a ten bit value which determines the size of screen 1. When the vertical size
is equal to or greater than the physical number of lines being displayed there is no visible effect on
the display. When the vertical size value is less than the number of physical display lines, operation
is like this:
1. From the beginning of a frame to the number of lines indicated by vertical size the display data
2. After vertical size lines have been displayed the system will begin displaying data from the
will come from the memory area pointed to by the Screen 1 Display Start Address.
memory area pointed to by Screen 2 Display Start Address.
Bit 6
n/a
Figure 5-2 320 240 Single Panel For Split Screen
Bit 5
n/a
Scan Line 199
Scan Line 200
Scan Line 239
Screen 1 Vertical Size Registers = 199 lines
Scan Line 0
...
...
Bit 4
n/a
EPSON
Bit 3
n/a
Image 1
Image 2
Bit 2
n/a
S1D13705F00A PROGRAMMING NOTES
AND EXAMPLES (X27A-G-002-01)
Bit 1
Bit 9
Bit 0
Bit 8