Epson Research and Development

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9 Frame Rate Calculation

The following formulae are used to calculate the display frame rate.

TFT/D-TFD and Passive Single-Panel modes

 

fPC L K

FrameRate = ----------------------------------------------------------------------------------------

 

(HDP + HNDP) ⋅ (VDP + VNDP)

Where: fPCLK

= PClk frequency (Hz)

HDP

= Horizontal Display Period = ((REG[04h] bits 6-0) + 1) x 8 Pixels

HNDP

= Horizontal Non-Display Period = ((REG[08h] bits 4-0) + 4) x 8 Pixels

VDP

= Vertical Display Period = ((REG[06h] bits 1-0, REG[05h] bits 7-0) + 1) Lines

VNDP

= Vertical Non-Display Period = (REG[0Ah] bits 5-0) Lines

Passive Dual-Panel mode

 

fPC L K

 

 

FrameRate = --------------------------------------------------------------------------------------------------

 

2 ⋅ (HDP + HNDP) ⋅ -----VDP-------

+ VNDP

 

2

 

 

 

Where: fPCLK

= PClk frequency (Hz)

 

 

HDP

= Horizontal Display Period = ((REG[04h] bits 6-0) + 1) x 8 Pixels

HNDP

= Horizontal Non-Display Period = ((REG[08h] bits 4-0) + 4) x 8 Pixels

VDP

= Vertical Display Period = ((REG[06h] bits 1-0, REG[05h] bits 7-0) + 1) Lines

VNDP

= Vertical Non-Display Period = (REG[0Ah] bits 5-0) Lines

Hardware Functional Specification

S1D13705

Issue Date: 02/02/01

X27A-A-001-10

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Epson S1D13705 technical manual Frame Rate Calculation, TFT/D-TFD and Passive Single-Panel modes, Passive Dual-Panel mode