User`s manual

7: A.C. CHARACTERISTICS
S1D13504 SERIES HARDWARE FUNCTIONAL EPSON 1-61
SPECIFICATION (X19A-A-002-17)
7.4.13 CRT Timing
Figure 7-44 CRT Timing
VDP = Vertical Display Period = (REG[09h] bits [1:0], REG[08h] bits [7:0]) + 1
VNDP = Vertical Non-Display Period = (REG[0Ah] bits [5:0]) + 1
HDP = Horizontal Display Period = ((REG[04h] bits [6:0]) + 1)∗8 Ts
HNDP = Horizontal Non-Display Period = HNDP
1 + HNDP2 = ((REG[05h] bits [4:0]) + 1)∗8 Ts
VRTC
HRTC
LINE1 LINE480
1-1 1-2 1-640
HRTC
DACCLK
BLANK#
DACP[7:0]
DACD[7:0]
VDP
HDP
VNDP
HNDP1
BLANK#
Example Timing for 640x480 CRT
HNDP2
LINE480