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Hardware Functional Specification S1D13705
Issue Date: 02/02/01 X27A-A-001-10
9 Frame Rate Calculation
The following formulae are used to calculate the display frame rate.
TFT/D-TFD and Passive Single-Panel modes
Where: f
PCLK
= 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
Where: f
PCLK
= 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
FrameRate
f
PCLK
HDP HNDP+()VDP VNDP+()×
-----------------------------------------------------------------------------------------=
FrameRate
f
PCLK
2 HDP HNDP+()×
VDP
2
------------ V N D P+
×
---------------------------------------------------------------------------------------------------=
