Epson Research and Development
Page 213
Vancouver Design Center
18 Clocking
18.1 Frame Rate Calculation
18.1.1 LCD Frame Rate Calculation
The maximum LCD frame rate is calculated using the following formula.
LCD PCLKmax
max. LCD Frame Rate = ---------------------------------------------------------------------------------------------------------
LVDP
(LHDP + LHNDP) × ---------------- + L V N D P
n
Where:
LCD PCLKmax= maximum LCD pixel clock frequency
LVDP
= LCD Vertical Display Height
= (REG[039h] bits [1:0], REG[038h] bits [7:0]) + 1
LVNDP
LHDP
= LCD Vertical Non-Display Period
= REG[03Ah] bits [5:0] + 1
= LCD Horizontal Display Width
= (REG[032h] bits [6:0] + 1) x 8Ts
LHNDP
= LCD Horizontal Non-Display Period
= (REG[034h] bits [4:0] + 1) x 8Ts
Ts
n
= minimum LCD pixel clock (LPCLK) period
= 1 for single panel
= 2 for dual panel
Hardware Functional Specification
Issue Date: 01/02/06
S1D13506
X25B-A-001-10
EPSON [ EPSON COMPANY ]
