NEC X981UHD External Control Codes - Page 21

Get Timing Report and Timing reply. - display

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5.5.2 Get Timing Report and Timing reply. The controller requests the monitor to report the displayed image timing. STX Command code '0' '7' ETX Ø Send "07"(30h, 37h) as Get Timing Report command. Ø 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 Ø 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. Ø H Freq: Horizontal Frequency in unit 0.01kHz Ø 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. (21/130)

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(21/130)
5.5.2 Get Timing Report and Timing reply.
The controller requests the monitor to report the displayed image timing.
Ø
Send "07"(30h, 37h) as Get Timing Report command.
Ø
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;
Ø
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.
Ø
H Freq: Horizontal Frequency in unit 0.01kHz
Ø
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.
STX
Command code
ETX
'0'
'7'
STX
Command
SS
H Freq.
V Freq.
ETX
'4'
'E'
Hi
Lo
MSB
LSB
MSB
LSB