Datasheet
AD9880
Rev. 0 | Page 50 of 64
Table 76.
PLL_N [2:0] MCLK Divide Value
0 /1
1 /2
2 /3
3 /4
4 /5
5 /6
6 /7
7 /8
0x58 3 N_CTS_Disable
This bit makes it possible to prevent the N/CTS packet
on the link from writing to the N and CTS registers.
0x58 2-0 MCLK fs_N
These bits control the multiple of 128 fs used for
MCLK out.
Table 77.
MCLK fs_N [2:0] fs Multiple
0 128
1 256
2 384
3 512
4 640
5 768
6 896
7 1024
0x59 6 MDA/MCL PU Disable
This bit disables the inter MDA/MCL pull-ups.
0x59 5 CLK Term O/R
This bit allows for overriding during power down.
0 = auto, 1 = manual.
0x59 4 Manual CLK Term
This bit allows normal clock termination or
disconnects this. 0 = normal, 1 = disconnected.
0x59 2 FIFO Reset UF
This bit resets the audio FIFO if underflow is detected.
0x59 1 FIFO Reset OF
This bit resets the audio FIFO if overflow is detected.
0x59 0 MDA/MCL Three-State
This bit three-states the MDA/MCL lines to allow in-
circuit programming of the EEPROM.
0x5A 6-0 Packet Detect
This register indicates if a data packet in specific
sections has been detected. These seven bits are
updated if any specific packet has been received since
last reset or loss of clock detect. Normal is 0x00.
Table 78.
Packet Detect Bit Packet Detected
0 AVI infoframe
1 Audio infoframe
2 SPD infoframe
3 MPEG Source infoframe
4 ACP packets
5 ISRC1 packets
6 ISRC2 packets
0x5B 3 HDMI Mode
0 = DVI, 1 = HDMI.
0x5E 7-6 Channel Status Mode
0x5E 5-3 PCM Audio Data
0x5E 2 Copyright Information
0x5E 1 Linear PCM Identification
0x5E 0 Use of Channel Status Block
0x5F 7-0 Channel Status Category Code
0x60 7-4 Channel Number
0x60 3-0 Source Number
0x61 5-4 Clock Accuracy
0x61 3-0 Sampling Frequency
Table 79.
Code Frequency (kHz)
0x0 44.1
0x2 48
0x3 32
0x8 88.2
0xA 96
0xC 176.4
0xE 192
0x62 3-0 Word Length
0x7B 7-0 CTS (Cycle Time Stamp) (19-12)
These are the most significant 8 bits of a 20-bit word
used in the 20-bit N term in the regeneration of the
audio clock.
0x7C 7-0 CTS (11-4)
0x7D 7-4 CTS (3-0)
0x7D 3-0 N (19-16)
These are the most significant 4 bits of a 20-bit word
used along with the 20-bit CTS term to regenerate the
audio clock.
0x80 AVI Infoframe Version
0x81 6-5 Y [1:0]
This register indicates whether data is RGB, 4:4:4 or
4:2:2.