Datasheet

AD9880
Rev. 0 | Page 31 of 64
Hex
Address
Read/Write
or Read Only
Bits
Default
Value
Register Name Description
Frequency 0000 = 44.1 kHz.
1000 = 88.2 kHz.
1100 = 176.4 kHz.
0010 = 48k Hz.
1010 = 96 kHz.
1110 = 192 kHz.
0x62 Read [3:0] Word Length Word length.
0000 not specified.
0100 16 bits.
0011 17 bits.
0010 18 bits.
0001 19 bits.
0101 20 bits.
1000 not specified.
1100 20 bits.
1011 21 bits.
1010 22 bits.
1001 23 bits.
1101 24 bits.
0x7B Read [7:0] CTS [19:12]
Cycle time stamp—this 20-bit value is used with the N value to
regenerate an audio clock. For remaining bits see Register 0x7C
and Register 0x7D.
0x7C Read [7:0] CTS [11:4]
0x7D Read [7:4] CTS [3:0]
Read [3:0] N [19:16]
20-bit N used with CTS to regenerate the audio clock. For
remaining bits, see Register 0x7E and Register 0x7F.
0x7E Read [7:0] N [15:8]
0x7F Read [7:0] N [7:0]
AVI Infoframe
0x80 Read [7:0] AVI Infoframe Version
0x81 Read [6:5] Y [1:0] Indicates RGB, 4:2:2 or 4:4:4.
00 = RGB.
01 = YCbCr 4:2:2.
10 = YCbCr 4:4:4.
4 Active Format Active format information present.
Information Status 0 = no data.
1 = active format information valid.
[3:2] Bar Information B [1:0].
00 = no bar information.
01 = horizontal bar information valid.
10 = vertical bar information valid.
11 = horizontal and vertical bar information valid.
[1:0] Scan Information S [1:0].
00 = no information.
01 = overscanned (television).
10 = underscanned (computer).
0x82 Read [7:6] Colorimetry C [1:0].
00 = no data.
01 = SMPTE 170M, ITU601.
10 = ITU709.
[5:4] Picture Aspect Ratio M [1:0].
00 = no data.