NEC UN552S External Controls - Page 20

Get Timing Report and Timing reply.

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5.5.2 Get Timing Report and Timing reply. The controller requests the monitor to report the displayed image timing. Command code STX 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. (20/145)

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(20/145)
5.5.2 Get Timing Report and Timing reply.
The controller requests the monitor to report the displayed image timing.
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;
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.
STX
Command code
ETX
'0'
'7'
STX
Command
SS
H Freq.
V Freq.
ETX
'4'
'E'
Hi
Lo
MSB
LSB
MSB
LSB