S1D13700F01A100 Epson, S1D13700F01A100 Datasheet - Page 115

• 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

7: HARDWARE ROTATION
2-30
For this example the Horizontal Non-Display register [REG[08h]) needs to be set to 07h and the
Vertical Non-Display register (REG[0Ah]) needs to be set to 03h.
The 16,000,000/2 in the formula above represents the input clock being divided by two when this
alternate SwivelView mode is selected. With the values given for this example we must ensure the
Input Clock Divide bit (REG[02h] b4) is reset (with the given values it was likely set as a result of
the frame rate calculations for landscape display mode).
No other registers need to be altered.
The display is now configured for SwivelView mode use. Offset zero of display memory
corresponds to the upper left corner of the display. Display memory is accessed exactly as it was for
landscape mode.
As this is the alternate SwivelView mode the power of two stride issue encountered with the default
SwivelView mode is no longer an issue. The stride is the same as the SwivelView mode width. In
this case 120 bytes.
Example 8
Pan the above SwivelView mode image to the right by 4 pixels then scroll it up by 6
pixels.
To pan by four pixels the start address needs to be advanced.
1. Calculate the number of bytes to change start address by.
2. Increment the start address registers by the just calculated value.
To scroll by 4 lines we have to change the start address by the offset of four lines of display.
1. Calculate the number of bytes to change start address by.
2. Increment the start address registers by the just calculated value
Bytes = Pixels BitsPerPixel / 8 = 4 4 / 8 = 2 bytes
In this case the value write to the start address register will be 81h (7Fh + 2 = 81h)
BytesPerLine = LineByteCount = 128
Bytes = Lines BytesPerLine = 4 128 = 512 = 200h
In this case 281h (81h + 200h) will be written to the Screen 1 Start Address register set.
Set Screen1 Display Start Word Address LSB (REG[0Ch]) to 81h and Screen1 Display Start
Word Address MSB (REG[0Dh]) to 02h.
FrameRate
FrameRate
=
=
---------------------------------------------------------------------------------------- -
HDP
-------------------------------------------------------
320
EPSON
+
16 000 000
----------------------------- -
+
HNDP
88
2
PCLK
240
VDP
+
3
=
+
VNDP
80.69
S1D13705F00A PROGRAMMING NOTES
AND EXAMPLES (X27A-G-002-01)