Epson Research and Development
Page 215
Vancouver Design Center
18.1.3 TV Frame Rate Calculation
The maximum TV frame rate is calculated using the following formula.
TV PCLKmax
max. TV Frame Rate = ----------------------------------------------------------------------------------------------------------------------
(THDP + THNDP) × (TVDP + TVNDP + 0.5)
Where:
TV PCLKmax= maximum TV pixel clock frequency
TVDP
= TV Vertical Display Height
= (REG[057h] bits [1:0], REG[056h] bits [7:0]) + 1
TVNDP
THDP
= TV Vertical Non-Display Period
= REG[058h] bits [6:0] + 1
= TV Horizontal Display Width
= (REG[050h] bits [6:0] + 1) x 8Ts
THNDP
= TV Horizontal Non-Display Period
= (REG[052h] bits [5:0] x 8Ts) + 6 for NTSC output
= (REG[052h] bits [5:0] x 8Ts) + 7 for PAL output
Ts
= minimum TV pixel clock (TPCLK) period
Hardware Functional Specification
Issue Date: 01/02/06
S1D13506
X25B-A-001-10
EPSON [ EPSON COMPANY ]
