NEC RS-232C Get Timing Report and Timing reply,  Send 0730h, 37h as Get Timing Report command

5.5.2 Get Timing Report and Timing reply.

The controller requests the monitor to report the displayed image timing.

STX	Command code		ETX
	'0'	'7'

Send "07"(30h, 37h) as Get Timing Report command.

Complete "Get Timing Report" command packet as follows; ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-37h-03h-CHK-0Dh

SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'7'-ETX-CHK- CR The monitor replies status as the following format;

STX

Command

SS

H Freq.

V Freq.

ETX

'4'

'E'

Hi

Lo

MSB

LSB

MSB

LSB

SS: Timing status byte

Bit 7 = 1: Sync Frequency is out of range.

Bit 6 = 1: Unstable count

Bit 5-2 Reserved (Don't care)

Bit 1 1:Positive Horizontal sync polarity. 0:Negative Horizontal sync polarity.

Bit 0 1:Positive Vertical sync polarity. 0:Negative Vertical sync polarity.

H Freq: Horizontal Frequency in unit 0.01kHz

V Freq: Vertical Frequency in unit 0.01Hz

Ex.) When H Freq is '1''2''A''9' (31h, 32h, 41h, 39h), it means 47.77kHz.

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