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S1D13504 Hardware Functional Specification
X19A-A-002-18 Issue Date: 01/01/30
bit 7 HRTC Polarity Select
For CRTs, this bit selects the polarity of the HRTC. When this bit = 1, the HRTC pulse is active
high. When this bit = 0, the HRTC pulse is active low.
bit 6 FPLINE Polarity Select
This bit selects the polarity of the FPLINE for TFT and passive LCD. When this bit = 1, the
FPLINE pulse is active high for TFT and active low for passive LCD. When this bit = 0, the
FPLINE pulse is active low for TFT and active high for passive LCD.
bits 3-0 HRTC/FPLINE Pulse Width Bits [3:0]
For CRTs and TFTs, these bits specify the pulse width of HRTC a nd FPLINE res pectively. For pas-
sive LCDs, FPLINE is automatically created and these bits have no effect.
HRTC/FPLINE pulse width (pixels) = (HRTC/FPLINE Pulse Width Bits [3:0] + 1) × 8.
The maximum HRTC pulse width is 128 pixels.
Note
This register must be programmed such that
(REG[05h] + 1) (REG[06h] + 1) + (REG[07h] bits [3:0] + 1)
REG[08h] bits 7-0 Vertical Display Height Bits [9:0]
REG[09h] bits 1-0 These bits specify the LCD panel and/or the CRT vertical display height, in 1-line resolution. For a
dual LCD panel only configuration, this register should be programmed to half the panel size.
Vertical display height in number of lines = (ContentsOfThisRegister) + 1.
The maximum vertical display height is 1024 lines.
HRTC/FPLINE Pulse Width Register
REG[07h] RW
HRTC
Polarity
Select
FPLINE
Polarity
Select n/a n/a HRTC/
FPLINE Pulse
Width Bit 3
HRTC/
FPLINE Pulse
Width Bit 2
HRTC/
FPLINE Pulse
Width Bit 1
HRTC/
FPLINE Pulse
Width Bit 0
Table 8-4: FPLINE Polarity Selection
FPLINE Polarity Select Passive LCD FPLINE Polarity TFT FPLINE Polarity
0 active high active low
1 active low active high
Vertical Display Height Register 0
REG[08h] RW
Vertical
Display
Height Bit 7
Vertical
Display
Height Bit 6
Vertical
Display
Height Bit 5
Vertical
Display
Height Bit 4
Vertical
Display
Height Bit 3
Vertical
Display
Height Bit 2
Vertical
Display
Height Bit 1
Vertical
Display
Height Bit 0
Vertical Display Height Register 1
REG[09h] RW
n/a n/a n/a n/a n/a n/a Vertical
Display
Height Bit 9
Vertical
Display
Height Bit 8