Epson S1D13504 manual Vertical Non-Display Period Register, VRTC/FPFRAME Start Position Register

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Vertical Non-Display Period Register
REG[0Ah]								RW
Vertical			Vertical	Vertical	Vertical	Vertical	Vertical	Vertical
Non-Display
	n/a		Non-Display	Non-Display	Non-Display	Non-Display	Non-Display	Non-Display
Period Status
			Period Bit 5	Period Bit 4	Period Bit 3	Period Bit 2	Period Bit 1	Period Bit 0
(RO)
bit 7		Vertical Non-Display Period Status
		This is a read-only status bit. A “1” indicates that a vertical non-display period is occurring. A “0”
		indicates that display output is in a vertical display period.
		Note
		When configured for a dual panel, this bit will toggle at twice the frame rate.
bits 5-0		Vertical Non-Display Period Bits [5:0]
		These bits specify the vertical non-display period height in 1-line resolution.

Vertical non-display period height in number of lines = (ContentsOfThisRegister) + 1.

The maximum vertical non-display period height is 64 lines.

		Note
		This register must be programmed such that
		REG[0Ah] ≥ 1 and (REG[0Ah] bits [5:0] + 1) ≥				(REG[0Bh] + 1) + (REG[0Ch] bits [2:0] + 1)
VRTC/FPFRAME Start Position Register
REG[0Bh]									RW
			VRTC/	VRTC/	VRTC/		VRTC/	VRTC/	VRTC/
n/a	n/a		FPFRAME	FPFRAME	FPFRAME		FPFRAME	FPFRAME	FPFRAME
			Start Position	Start Position	Start Position		Start Position	Start Position	Start Position
			Bit 5	Bit 4	Bit 3		Bit 2	Bit 1	Bit 0
bits 5-0		VRTC/FPFRAME Start Position Bits [5:0]

For CRTs and TFTs, these bits specify the delay in lines from the start of the vertical non-display period to the leading edge of the VRTC pulse and FPFRAME pulse respectively. For passive LCDs, FPFRAME is automatically created and these bits have no effect.

VRTC/FPFRAME start position (lines) = VRTC/FPFRAME Start Position Bits [5:0] + 1.

The maximum VRTC start delay is 64 lines.

Note

This register must be programmed such that

(REG[0Ah] bits [5:0] + 1) ≥ (REG[0Bh] + 1) + (REG[0Ch] bits [2:0] + 1)

Hardware Functional Specification	S1D13504
Issue Date: 01/01/30	X19A-A-002-18