- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
179
12.
Supporting Functions for applications
12.1. Using Digital Output
12.1.1. Operation Modes with Digital Output
The operation modes (MODESEL) available when digital output is used with the SS-HQ1 are limited.
See Appendix “13.2 Operation Mode Control during Digital Output” for details.
12.1.2. Digital Output Format
Two digital output formats are supported for output from the CXD3172AR: ITU-REC601-compliant output and
ITU-REC656-compliant output.
• ITU-REC601-compliant output
Chroma signal The pre-modulation signal is output as 8 bits from the Port 0-7 pins (CXD3172AR pins
91–94 and 96–99). The modulated signal cannot be output.
Luminance signal This signal is output as 8 bits from the Port 8-15 pins (CXD3172AR pins 76-80 and
82-84). Sync is not added.
Output rate
Output at 1/2 the encoder clock (ECK) rate. (13.5MHz output is not supported.)
Sync signal
The horizontal sync signal DHD is output through the S0 pin (CXD3172AR pin 44). The
vertical sync signal DVD is output through the S1 pin (CXD3172AR pin 46). The RYBY
judgment signal (NRYBY) is output through the S3 pin (CXD3172AR pin 48).
• ITU-REC656-compliant output
The chroma signal, luminance signal, blanking signal, and TRC are multiplexed and output as 8 bits
through the Port 8-15 pins (CXD3172AR pins 76-80 and 82-84).
The output rate is that of the encoder clock (ECK). (27MHz output is not supported.)
12.1.3. Digital Output Gain Setting
The digital output gain can be set independently of analog output, using the following parameters. For details,
see 8. “Level Diagram”.
Table 12.1-1 Digital Gain Adjustment Parameters
Parameter
Description
RECYGAIN CAT10_Byte8_bit0-7
Digital Y gain setting
Setting range: 0-1.99x
RECRYGAIN CAT10_Byte9_bit0-7
Digital R-Y gain
Setting range: 0-3.99x
RECBYGAIN CAT10_Byte10_bit0-7
Digital B-Y gain
Setting range: 0-3.99x