SED1354 Datasheet, PDF (128/472 Pages) Epson Company – Color Graphics LCD/CRT Controller

Page 120
Epson Research and Development
Vancouver Design Center
11.2 Frame Rate Calculation
The frame rate is calculated using the following formula:
FrameRate = --------------------------------P----C----L----K-----^m----^a--^x---------------------------------
(HDP + HNDP) × (VDP + VNDP)
Where:
VDP = Vertical Display Period
VNDP = Vertical Non-Display Period
HDP = Horizontal Display Period
HNDP = Horizontal Non-Display Period
Ts
= Pixel Clock
= REG[09h] bits [1:0], REG[08h] bits [7:0] + 1
= REG[0Ah] bits [5:0] + 1
= in table below
= ((REG[04h] bits [6:0]) + 1) * 8Ts
= ((REG[05h] bits [4:0]) + 1) * 8Ts
= given in table below
= PCLK
Table 11-3: Example Frame Rates
DRAM Type¹
(Speed Grade)
Display
Resolution
50ns
EDO-DRAM
• Single Panel.
• CRT.
• Dual Monochrome/Color Panel
with Half Frame Buffer Disabled.⁵
• Simultaneous CRT + Single Panel.
• Simultaneous CRT + Dual
Monochrome/Color Panel with Half
Frame Buffer Disabled.⁵
800x600²
640x480
640x240
MClk = 40MHz
N_RC = 4
N_RP = 1.5
N_RCD = 2
480x320
320x240
• Dual Color with Half Frame Buffer
Enabled.
• Dual Mono with Half Frame Buffer
Enabled.
800x600^2,3
640x480
Color
Depth
(bpp)
1/2/4/8
16
1/2/4/8
16
1/2/4/8
16
1/2/4/8
16
1/2/4/8
16
1/2/4/8
16
1/2/4/8
16
Maximum
Pixel ^Minimum
Panel
Clock
(MHz)
HNDP(T_s)
32
56
32
56
32
40
56
32
56
32
56
20
32
13.3
32
20
32
13.3
32
Maximum Frame
Rate (Hz)
Panel⁴ CRT
80
60
78
60
123
85
119
85
247
-
242
-
243
-
232
-
471
-
441
-
80
-
53
-
123
-
82
-
SED1354
X19A-A-002-16
Hardware Functional Specification
Issue Date: 99/05/18