STMICROELECTRONICS STA309B

STA309B
Multichannel digital audio processor with FFX®
Preliminary data
Features
■
8 channels of 24-bit FFX®
■
>100 dB SNR and dynamic range
■
Selectable 32 kH-192 kHz input sampling rates
■
6 channels of DSD/SACD and PDM input
■
■
Digital gain/attenuation +58 dB to -100 dB in
0.5 dB steps
■
■
Advanced “pop-free” operation
■
■
Digital “pop-free” operation for single-ended
mode
■
■
Soft volume update
■
Individual channel and master gain/attenuation
plus channel trim (-10 dB to +10 dB)
■
■
Up to 10 independent 32-bit userprogrammable biquads (EQ) per channel
■
■
Bass/treble tone control
■
■
Pre- and post-EQ full 8-channel input mix on all
8 channels
■
Dual independent limiters/compressors
■
Dynamic range compression or anti-clipping
modes
■
AutoModes
– 5-band graphic EQ
– 32 preset EQ curves (rock, jazz, pop, etc.)
– Automatic volume controlled loudness
– 5.1 to 2-channel downmix
– Simultaneous 5.1- and 2-channel downmix
outputs
– 3 preset volume curves
– 2 preset anti-clipping modes
– Preset movie nighttime listening mode
– Preset TV channel/commercial AGC mode
– 5.1, 2.1 bass management configurations
– AM frequency automatic output PWM
frequency shifting
– 8 preset crossover filters
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VFQFPN-56
■
■
Automatic zero-detect and invalid input mute
Automatic amplifier power-down on clock loss
Advanced AM interference frequency
switching and noise suppression modes
I2S output channel mapping function
Independent channel volume and DSP bypass
Channel mapping of any input to any
processing/FFX channel
Selectable per-channel FFX damped ternary or
binary PWM output
Max power correction for lower full-power THD
Variable per-channel FFX output delay control
192 kHz internal processing sampling rate,
24-bit to 36-bit precision
Description
Individual channel and master soft/hard mute
January 2012
■
The STA309B is a single-chip solution for digital
audio processing and control in multichannel
applications and provides output capabilities for
FFX (full flexible amplification). In conjunction with
an FFX power device, it provides high-quality,
high-efficiency, all-digital amplification. The device
is extremely versatile, allowing for input of most
digital formats including 6.1/7.1-channel and
192 kHz, 24-bit DVD-audio, DSD/SACD and PDM
for MEMS microphone inputs. In the 5.1
application, the additional 2 channels can be used
for audio line-out or headphone drive. In speaker
mode, with 8 channel outputs in parallel, the
STA309B can deliver 1 W (maximum).
Table 1.
Device summary
Order code
Package
Packaging
STA309B
VFQFPN56
Tube
STA309BTR
VFQFPN56
Tape and reel
Doc ID 022570 Rev 2
1/66
www.st.com
66
Contents
STA309B
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2
Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5
I2C bus operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1
Communication protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.1
Data transition or change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.2
Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.3
Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1.4
Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2
Device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3
Write operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.1
Byte write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.2
Multi-byte write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6
Application reference schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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7.1
Register summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.2
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2.1
Configuration register A (0x00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2.2
Configuration register B (0x01) - serial input formats . . . . . . . . . . . . . . 24
7.2.3
Configuration register C (0x02) - serial output formats . . . . . . . . . . . . . 26
7.2.4
Configuration register D (0x03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.2.5
Configuration register E (0x04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.2.6
Configuration register F (0x05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Doc ID 022570 Rev 2
STA309B
Contents
7.2.7
Configuration register G (0x06) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.2.8
Configuration register H (0x07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2.9
Configuration register I (0x08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.2.10
Master mute register (0x09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.11
Master volume register (0x0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.12
Channel 1 volume (0x0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.13
Channel 2 volume (0x0C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.14
Channel 3 volume (0x0D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.15
Channel 4 volume (0x0E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.16
Channel 5 volume (0x0F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.17
Channel 6 volume (0x10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.18
Channel 7 volume (0x11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.19
Channel 8 volume (0x12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.20
Channel 1 volume trim, mute, bypass (0x13) . . . . . . . . . . . . . . . . . . . . 34
7.2.21
Channel 2 volume trim, mute, bypass (0x14) . . . . . . . . . . . . . . . . . . . . 34
7.2.22
Channel 3 volume trim, mute, bypass (0x15) . . . . . . . . . . . . . . . . . . . . 34
7.2.23
Channel 4 volume trim, mute, bypass (0x16) . . . . . . . . . . . . . . . . . . . . 35
7.2.24
Channel 5 volume trim, mute, bypass (0x17) . . . . . . . . . . . . . . . . . . . . 35
7.2.25
Channel 6 volume trim, mute, bypass (0x18) . . . . . . . . . . . . . . . . . . . . 35
7.2.26
Channel 7 volume trim, mute, bypass (0x19) . . . . . . . . . . . . . . . . . . . . 35
7.2.27
Channel 8 volume trim, mute, bypass (0x1A) . . . . . . . . . . . . . . . . . . . . 35
7.2.28
Channel input mapping channels 1 and 2 (0x1B) . . . . . . . . . . . . . . . . . 37
7.2.29
Channel input mapping channels 3 and 4 (0x1C) . . . . . . . . . . . . . . . . . 37
7.2.30
Channel input mapping channels 5 and 6 (0x1D) . . . . . . . . . . . . . . . . . 37
7.2.31
Channel input mapping channels 7 and 8 (0x1E) . . . . . . . . . . . . . . . . . 37
7.2.32
AUTO1 - AutoModes EQ, volume, GC (0x1F) . . . . . . . . . . . . . . . . . . . . 38
7.2.33
AUTO2 - AutoModes bass management2 (0x20) . . . . . . . . . . . . . . . . . 39
7.2.34
AUTO3 - AutoMode AM/pre-scale/bass management scale (0x21) . . . 40
7.2.35
PREEQ - preset EQ settings (0x22) . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.2.36
AGEQ - graphic EQ 80-Hz band (0x23) . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.37
BGEQ - graphic EQ 300-Hz band (0x24) . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.38
CGEQ - graphic EQ 1-kHz band (0x25) . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.39
DGEQ - graphic EQ 3-kHz band (0x26) . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.40
EGEQ - graphic EQ 8-kHz band (0x27) . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.2.41
Biquad internal channel loop-through (0x28) . . . . . . . . . . . . . . . . . . . . . 43
7.2.42
Mix internal channel loop-through (0x29) . . . . . . . . . . . . . . . . . . . . . . . 44
7.2.43
EQ bypass (0x2A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
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Contents
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STA309B
7.2.44
Tone control bypass (0x2B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.2.45
Tone control (0x2C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.2.46
Channel limiter select channels 1,2,3,4 (0x2D) . . . . . . . . . . . . . . . . . . . 45
7.2.47
Channel limiter select channels 5,6,7,8 (0x2E) . . . . . . . . . . . . . . . . . . . 45
7.2.48
Limiter 1 attack/release rate (0x2F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.2.49
Limiter 1 attack/release threshold (0x30) . . . . . . . . . . . . . . . . . . . . . . . . 46
7.2.50
Limiter 2 attack/release rate (0x31) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.2.51
Limiter 2 attack/release threshold (0x32) . . . . . . . . . . . . . . . . . . . . . . . . 46
7.2.52
Bit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.2.53
Channel 1 and 2 output timing (0x33) . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.2.54
Channel 3 and 4 output timing (0x34) . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.2.55
Channel 5 and 6 output timing (0x35) . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.2.56
Channel 7 and 8 output timing (0x36) . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.2.57
Channel I2S output mapping channels 1 and 2 (0x37) . . . . . . . . . . . . . 51
7.2.58
Channel I2S output mapping channels 3 and 4 (0x38) . . . . . . . . . . . . . 51
7.2.59
Channel I2S output mapping channels 5 and 6 (0x39) . . . . . . . . . . . . . 51
7.2.60
Channel I2S output mapping channels 7 and 8 (0x3A) . . . . . . . . . . . . . 52
7.2.61
Coefficient address register 1 (0x3B) . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2.62
Coefficient address register 2 (0x3C) . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2.63
Coefficient b1 data register, bits 23:16 (0x3D) . . . . . . . . . . . . . . . . . . . . 52
7.2.64
Coefficient b1 data register, bits 15:8 (0x3E) . . . . . . . . . . . . . . . . . . . . . 53
7.2.65
Coefficient b1 data register, bits 7:0 (0x3F) . . . . . . . . . . . . . . . . . . . . . . 53
7.2.66
Coefficient b2 data register, bits 23:16 (0x40) . . . . . . . . . . . . . . . . . . . . 53
7.2.67
Coefficient b2 data register, bits 15:8 (0x41) . . . . . . . . . . . . . . . . . . . . . 53
7.2.68
Coefficient b2 data register, bits 7:0 (0x42) . . . . . . . . . . . . . . . . . . . . . . 53
7.2.69
Coefficient a1 data register, bits 23:16 (0x43) . . . . . . . . . . . . . . . . . . . . 53
7.2.70
Coefficient a1 data register, bits 15:8 (0x44) . . . . . . . . . . . . . . . . . . . . . 53
7.2.71
Coefficient a1 data register, bits 7:0 (0x45) . . . . . . . . . . . . . . . . . . . . . . 54
7.2.72
Coefficient a2 data register, bits 23:16 (0x46) . . . . . . . . . . . . . . . . . . . . 54
7.2.73
Coefficient a2 data register, bits 15:8 (0x47) . . . . . . . . . . . . . . . . . . . . . 54
7.2.74
Coefficient a2 data register, bits 7:0 (0x48) . . . . . . . . . . . . . . . . . . . . . . 54
7.2.75
Coefficient b0 data register, bits 23:16 (0x49) . . . . . . . . . . . . . . . . . . . . 54
7.2.76
Coefficient b0 data register, bits 15:8 (0x4A) . . . . . . . . . . . . . . . . . . . . . 54
7.2.77
Coefficient b0 data register, bits 7:0 (0x4B) . . . . . . . . . . . . . . . . . . . . . . 54
7.2.78
Coefficient write control register (0x4C) . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.3
Reading a coefficient from RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.4
Reading a set of coefficients from RAM . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Doc ID 022570 Rev 2
STA309B
8
Contents
7.5
Writing a single coefficient to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.6
Writing a set of coefficients to RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Equalization and mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1
Post-scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.2
Variable maximum power correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.2.1
8.3
Variable distortion compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.3.1
8.4
8.5
MPCC1-2 (0x4D, 0x4E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
DCC1-2 (0x4F, 0x50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
PSCorrect registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.4.1
PSC1-2: ripple correction value (RCV) (0x51, 0x52) . . . . . . . . . . . . . . . 60
8.4.2
PSC3: correction normalization value (CNV) (0x53) . . . . . . . . . . . . . . . 60
Digital pop-free operation in single-ended mode . . . . . . . . . . . . . . . . . . . 60
8.5.1
PFCXON: digital pop-free register (0x5F) . . . . . . . . . . . . . . . . . . . . . . . 61
8.5.2
Timing settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
8.5.3
RAMPTIM: ramp duration register (0x66) . . . . . . . . . . . . . . . . . . . . . . . 62
8.5.4
TSPUPT: waiting time after EAPD (0x67 - 0x68) . . . . . . . . . . . . . . . . . . 62
8.5.5
LSPDWT: waiting time before EAPD (0x71 - 0x72) . . . . . . . . . . . . . . . . 62
9
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Doc ID 022570 Rev 2
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List of tables
STA309B
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
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Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General interface electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DC electrical characteristics: 3.3-V buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Register summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
RAM block for biquads, mixing, and bass management. . . . . . . . . . . . . . . . . . . . . . . . . . . 57
VFQFPN-56 (8 x 8 mm) package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Exposed pad variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Doc ID 022570 Rev 2
STA309B
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Channel signal flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Write mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Read mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Reference schematic for STA309B-based application . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Basic limiter and volume flow diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Channel mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Typical single-ended driver - power stage configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Pop-free timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
VFQFPN-56 (8 x 8 mm) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Doc ID 022570 Rev 2
7/66
Block diagram
1
STA309B
Block diagram
Figure 1.
Block diagram
SCL
SA
MVO
SDA
OUT1A/B
LRCKI
BICKI
2
I C
SERIAL
DATA
IN
SDI12
SDI34
SDI56
OUT2A/B
OUT3A/B
OVERSAMPLING
SYSTEM
CONTROL
SDI78
VARIABLE
OVERSAMPLING
CHANNEL
MAPPING
TREBLE,
BASS, EQ
(BIQUADS )
PLL
XTI
Figure 2.
CKOUT
PWDN
FFX
OUT6A/B
OUT5A/B
OUT7A/B
VOLUME
LIMITING
LRCKO
BICKO
SDO12
SERIAL
DATA
OUT
VARIABLE
DOWNSAMPLING
POWER
DOWN
OUT4A/B
OUT8A/B
SYSTEM TIMING
PLLB
DDX
SDO34
SDO56
SDO78
EAPD
Channel signal flow
6 Inputs
From DSD
DSD
Conversion
Interp_Rate
8 Inputs
From I2S
1x,2x,4x
Interp
DSDE
Distortion
Compensation
From
Mix#1
Engine
Or
Previous
Channel
Biquad#10
Output
(CxBLP)
PreScale
Hard Set to
-18dB when
AutoMode EQ
(AMEQ)
8/66
High-Pass
Filter
User Progammable
Biquad #1 when
High-Pass Bypassed
(HPB)
Biquad
#2
Mapping/
Mix #1
Biquads
B/T
Volume
Limiter
Mix #2
2x
Interp
DDX
Output
NS
Biquad
#3
C_Con
Biquad
#4
Biquad
#5
Hard Set Coeffecients when AutoMode EQ
(AMEQ)
Doc ID 022570 Rev 2
PWM
Biquad
#6
Biquad
#7
Biquad
#8
Hard Set
Hard Set
Coeffecients when Coeffecients when
AutoMode
DeEmphasis
Bass Management
Enabled
Crossover
(DEMP)
(AMBMXE)
To
Mix#2
Engine
Bass
Treble
User Programmable
Biquads #9 and #10
When Tone Bypassed
(CxTCB)
STA309B
Pin connections
SDO_78
SDO_56
GND
VDD
SDO_34
SDO_12
LRCKO
BICKO
GND
VDD
EAPD
OUT1_A
OUT1_B
54
53
52
51
50
49
48
47
46
45
44
43
Pin connections (top view)
55
Figure 3.
PWDN
Pin connections
56
2
MVO
1
42
OUT2_A
GND
2
41
OUT2B
VDD
3
40
GND
GND
4
39
VDD
SDI_78
5
38
OUT3_A
SDI_56
6
37
OUT3_B
SDI_34
7
36
OUT4_A
SDI_12
8
35
OUT4_B
LRCKI
9
34
OUT5_A
BICKI
10
33
OUT5_B
VDD
11
32
GND
GND
12
31
VDD
RESET
13
30
OUT6_A
BYPASS
14
29
OUT6_B
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SA
SDA
SCL
XTI
FILTER_PLL
GNDA
VDDA
CKOUT
GND
VDD
OUT8_B
OUT8_A
OUT7_B
OUT7_A
VFQFPN-56
Doc ID 022570 Rev 2
9/66
Pin connections
Table 2.
STA309B
Pin description
STA309B pin
10/66
Type
Name
Description
1
5-V tolerant TTL input buffer
MVO/DSD_CLK
Master volume override/
DSD input clock
5
5-V tolerant TTL input buffer
SDI_78/DSD_6
Input serial data channels 7 & 8/
DSD input channel 6
6
5-V tolerant TTL input buffer
SDI_56/DSD_5
Input serial data channels 5 & 6/
DSD input channel 5
7
5-V tolerant TTL input buffer
SDI_34/DSD_4
Input serial data channels 3 & 4/
DSD input channel 4
8
5-V tolerant TTL input buffer
SDI_12/DSD_3
Input serial data channels 1 & 2/
DSD input channel 3
9
5-V tolerant TTL input buffer
LRCKI/DSD_2
Input left/right clock/
DSD input channel 2
10
5-V tolerant TTL input buffer
BICKI/DSD_1
Input serial clock/
DSD input channel 1
13
5-V tolerant TTL schmitt trigger
input buffer
RESET
Global reset
14
CMOS input buffer with pull-down
PLL_BYPASS
Bypass phase locked loop
15
CMOS input buffer with pull-down
SA
Select address (I2C)
16
Bidirectional buffer: 5-V tolerant TTL
schmitt trigger input; 3.3-V capable SDA
2 mA slew-rate controlled output
Serial data (I2C)
17
5-V tolerant TTL schmitt trigger
input buffer
SCL
Serial clock (I2C)
18
5-V tolerant TTL schmitt trigger
input buffer
XTI
Crystal oscillator input (clock input)
19
Analog pad
FILTER_PLL
PLL filter
20
Analog ground
GNDA
PLL ground
21
3.3V analog supply voltage
VDDA
PLL supply
22
3.3-V capable TTL tristate 4mA
output buffer
CKOUT
Clock output
25
3.3-V capable TTL 2mA output
buffer
OUT8B
PWM channel 8 output B
26
3.3-V capable TTL 2mA output
buffer
OUT8A
PWM channel 8 output A
27
3.3-V capable TTL 2mA output
buffer
OUT7B
PWM channel 7 output B
28
3.3-V capable TTL 2mA output
buffer
OUT7A
PWM channel 7 output A
29
3.3-V capable TTL 2mA output
buffer
OUT6B
PWM channel 6 output B
Doc ID 022570 Rev 2
STA309B
Table 2.
Pin connections
Pin description (continued)
STA309B pin
Type
Name
Description
30
3.3-V capable TTL 2mA output
buffer
OUT6A
PWM channel 6 output A
33
3.3-V capable TTL 2mA output
buffer
OUT5B
PWM channel 5 output B
34
3.3-V capable TTL 2mA output
buffer
OUT5A
PWM channel 5 output A
35
3.3-V capable TTL 2mA output
buffer
OUT4B
PWM channel 4 output B
36
3.3-V capable TTL 2mA output
buffer
OUT4A
PWM channel 4 output A
37
3.3-V capable TTL 2mA output
buffer
OUT3B
PWM channel 3 output B
38
3.3-V capable TTL 2mA output
buffer
OUT3A
PWM channel 3 output A
41
3.3-V capable TTL 2mA output
buffer
OUT2B
PWM channel 2 output B
42
3.3-V capable TTL 2mA output
buffer
OUT2A
PWM channel 2 output A
43
3.3-V capable TTL 2mA output
buffer
OUT1B
PWM channel 1 output B
44
3.3-V capable TTL 2mA output
buffer
OUT1A
PWM channel 1 output A
45
3.3-V capable TTL 4mA output
buffer
EAPD
Ext. amp power-down
48
3.3-V capable TTL 2mA output
buffer
BICKO
Output serial clock
49
3.3-V capable TTL 2mA output
buffer
LRCKO
Output left/right clock
50
3.3-V capable TTL 2mA output
buffer
SDO_12
Output serial data channels 1&2
51
3.3-V capable TTL 2mA output
buffer
SDO_34
Output serial data channels 3&4
54
3.3-V capable TTL 2mA output
buffer
SDO_56
Output serial data channels 5&6
55
3.3-V capable TTL 2mA output
buffer
SDO_78
Output serial data channels 7&8
56
5-V tolerant TTL schmitt trigger
input buffer
PWDN
Device power-down
3,11,21,24,31,39,
3.3-V digital supply voltage
46,52
VDD
3.3-V supply
2,4,12,20,23,32,
40,47,53
GND
Ground
Digital ground
Doc ID 022570 Rev 2
11/66
Electrical specifications
STA309B
3
Electrical specifications
3.1
Absolute maximum ratings
Table 3.
Absolute maximum ratings
Symbol
3.2
Parameter
Max
Unit
3.3-V I/O power supply
-0.5
4
V
VDDA
3.3-V logic power supply
-0.5
4
V
Vi
Voltage on input pins
-0.5
VDD + 0.5 V
Vo
Voltage on output pins
-0.5
VDD + 0.3 V
Tstg
Storage temperature
-40
150
°C
Tamb
Ambient operating temperature
-40
90
°C
Thermal data
Thermal data
Symbol
Rthj-case
Parameter
Min
Typ
Thermal resistance, junction-case (thermal pad)
STA309B
Max
1.5
Unit
°C/W
Recommended operating conditions
Table 5.
Recommended operating conditions
Symbol
12/66
Typ
VDD
Table 4.
3.3
Min
Parameter
Min
Typ
Max
Unit
VDD
I/O power supply
3.0
3.6
V
VDDA
Logic power supply
3.0
3.6
V
Tj
Operating junction temperature
-40
125
°C
Doc ID 022570 Rev 2
STA309B
3.4
Electrical specifications
Electrical specifications
The following specifications are valid for VDD = 3.3 V ± 0.3 V, VDDA = 3.3 V ± 0.3 V and
Tamb = 0 to 70 °C, unless otherwise stated.
Table 6.
Symbol
General interface electrical specifications
Parameter
Conditions
Min
Typ
Max
Unit
Iil
Low-level input no pull-up
Vi = 0 V
1 (1)
μA
Iih
High-level input no
pull-down
Vi = VDD
2
μA
IOZ
Tristate output leakage
without pull-up/down
Vi = VDD
2
μA
Vesd
Electrostatic protection
(human body model)
Leakage < 1μA
2000
V
1. The leakage currents are generally very small, < 1 nA. The values given here are maximum after an
electrostatic stress on the pin.
Table 7.
Symbol
DC electrical characteristics: 3.3-V buffers
Parameter
Conditions
Min
Typ
Max
Unit
0.8
V
VIL
Low-level input voltage
VIH
High-level input voltage
VILhyst
Low-level threshold
Input falling
0.8
1.35
V
VIHhyst
High-level threshold
Input rising
1.3
2.0
V
Vhyst
Schmitt trigger hysteresis
0.3
0.8
V
Vol
Low-level output
0.2
V
Voh
High-level output
2.0
IoI = 100 µA
V
Ioh = -100 µA
VDD0.2
V
Ioh = -2 mA
2.4
V
Doc ID 022570 Rev 2
13/66
Pin description
4
STA309B
Pin description
Master volume override (MVO)
This pin enables the user to bypass the volume control on all channels. When MVO is pulled
high, the master volume register is set to 0x00, which corresponds to its full-scale setting.
The master volume register setting offsets the individual channel volume settings, which
default to 0 dB.
Serial data in (SDI_12, SDI_34, SDI_56, SDI_78)
Audio information enters the device here. Six format choices are available including I2S,
left- or right-justified, LSB or MSB first, with word widths of 16, 18, 20 and 24 bits.
RESET
Driving this pin low turns off the outputs and returns all settings to their defaults.
I2C bus
The SA, SDA and SCL pins operate per the Phillips I2C specification. See Section 5: I2C
bus operation.
Phase locked loop (PLL)
The phase locked loop section provides the system timing signals and CKOUT.
Clock output (CKOUT)
System synchronization and master clocks are provided by CKOUT.
PWM outputs (OUT1 through OUT8)
The PWM outputs provide the input signal for the power devices.
External amplifier power-down (EAPD)
This signal can be used to control the power-down of FFX power devices.
Serial data out (SDO_12, SDO_34, SDO_56, SDO_78)
These are the outputs for audio information. Six different formats are available including I2S,
left- or right-justified, LSB or MSB first, with word widths of 16, 18, 20 and 24 bits.
Device power-down (PWDN)
Pulling PWDN low begins the power-down sequence which puts the STA309B into a
low-power state. EAPD (pin 51) goes low approximately 30 ms later.
14/66
Doc ID 022570 Rev 2
I2C bus operation
STA309B
5
I2C bus operation
The STA309B supports the I2C protocol via the input ports SCL and SDA_IN (master to
slave) and the output port SDA_OUT (slave to master).
This protocol defines any device that sends data on to the bus as a transmitter and any
device that reads the data as a receiver.
The device that controls the data transfer is known as the master and the other as the slave.
The master always starts the transfer and provides the serial clock for synchronization. The
STA309B is always a slave device in all of its communications.
5.1
Communication protocol
5.1.1
Data transition or change
Data changes on the SDA line must only occur when the SCL clock is low. An SDA transition
while the clock is high is used to identify a START or STOP condition.
5.1.2
Start condition
START is identified by a high to low transition of the data bus SDA signal while the clock
signal SCL is stable in the high state. A START condition must precede any command for
data transfer.
5.1.3
Stop condition
STOP is identified by low to high transition of the data bus SDA signal while the clock signal
SCL is stable in the high state. A STOP condition terminates communication between the
STA309B and the bus master.
5.1.4
Data input
During the data input the STA309B samples the SDA signal on the rising edge of clock SCL.
For correct device operation the SDA signal must be stable during the rising edge of the
clock and the data can change only when the SCL line is low.
5.2
Device addressing
To start communication between the master and the Omega FFX core, the master must
initiate with a start condition. Following this, the master sends 8 bits to the SDA line (MSB
first) corresponding to the device select address and read or write mode.
The 7 most significant bits are the device address identifiers, corresponding to the I2C bus
definition. In the STA309B the I2C interface has two device addresses depending on the SA
port configuration, 0x40 or 0100000x when SA = 0, and 0x42 or 0100001x when SA = 1.
The 8th bit (LSB) identifies read or write operation RW, this bit is set to 1 in read mode and 0
for write mode. After a START condition, the STA309B identifies on the bus the device
address and if a match is found, it acknowledges the identification on the SDA bus during
Doc ID 022570 Rev 2
15/66
I2C bus operation
STA309B
the 9th-bit time. The byte following the device identification byte is the internal space
address.
5.3
Write operation
Following the START condition the master sends a device select code with the RW bit set
to 0. The STA309B acknowledges this and then waits for the byte of internal address.
After receiving the internal byte address the STA309B again responds with an
acknowledgement.
5.3.1
Byte write
In the byte write mode the master sends one data byte, this is acknowledged by the FFX
core. The master then terminates the transfer by generating a STOP condition.
5.3.2
Multi-byte write
The multi-byte write modes can start from any internal address. The master generating a
STOP condition terminates the transfer.
Figure 4.
Write mode sequence
ACK
DEV-ADDR
BYTE
WRITE
START
ACK
DATA IN
STOP
RW
ACK
DEV-ADDR
MULTIBYTE
WRITE
START
Figure 5.
STOP
NO ACK
DATA
RW
STOP
ACK
DEV-ADDR
ACK
DEV-ADDR
NO ACK
ACK
SUB-ADDR
DATA
DEV-ADDR
S T AR T
RW
RW= ACK
HIGH
START
RW
ACK
STOP
ACK
DATA
DATA
NO ACK
DATA
STOP
START
ACK
SEQUENTIAL
RANDOM
READ
DEV-ADDR
START
16/66
ACK
DATA IN
Read mode sequence
START
SEQUENTIAL
CURRENT
READ
ACK
DATA IN
RW
DEV-ADDR
RANDOM
ADDRESS
READ
ACK
SUB-ADDR
ACK
CURRENT
ADDRESS
READ
ACK
SUB-ADDR
ACK
SUB-ADDR
RW
ACK
ACK
DATA
DEV-ADDR
S T AR T
RW
Doc ID 022570 Rev 2
NO ACK
ACK
DATA
DATA
STOP
+3.3V
+3.3V
POWER_ON_RST
C6
100NF
Y5V
EIA0603
C5
100NF
Y5V
EIA0603
SDATA2
SDATA1
SDATA0
LRCK
BICK
0
SDA
SCL
MCLK
0000-0603
R14
C155
1000PF
NPO
EIA0603
PWRDWN
C157
47PF
NPO
EIA0603
1000PF
MVO
TEST_MODE
VDD3.3_1
GND_1
NC 5
SDI_78
SDI_56
SDI_34
SDI_12
LRCKI
BICKI
VDD3.3_2
GND_2
NC 14
RESET
PLL_BYPASS
NPO
EIA0805
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
C147
C18
100NF
Y5V
EIA0603
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
Doc ID 022570 Rev 2
C15
1200PF
X7R
EIA0603
C16
100PF
NPO
EIA0603
GNDA
C19
220PF
NPO
EIA0603
C22
22UF
6.3VDC
EIA3528_B
L3
600 ohm@100mhz
2
1
EIA0805
C20
100NF
Y5V
EIA0603
+3.3V
C12
100NF
Y5V
EIA0603
+
+3.3V
C4
2.2UF
6.3VDC
EIA3216_A
The PLL filter must be placed as close
as possible to the STA309B pins
C24
+
100NF
Y5V
EIA0603
EAPD
Reference schematic for STA309B-based application
R15
3.40K
0603
L1
600 ohm@100mhz
2
1
EIA0805
C14
100NF
Y5V
EIA0603
+3.3V
0000-0603
Figure 6.
VDDA
CH6_A
CH6_B
CH3_A
CH3_B
CH4_A
CH4_B
CH5_A
CH5_B
CH2_A
CH2_B
CH1_A
CH1_B
R6
0
Application reference schematic
C25
100NF
Y5V
EIA0603
+3.3V
STA308A
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
+3.3V
6
C23
100NF
Y5V
EIA0603
U2
C145
100NF
Y5V
EIA0603
OUT2_A
OUT2_B
NC 46
GND_5
VDD3.3_5
OUT3_A
OUT3_B
OUT4_A
OUT4_B
OUT5_A
OUT5_B
NC 37
GND_4
VDD3.3_4
OUT6_A
OUT6_B
PWDN
SDO_78
SDO_56
NC 61
GND_7
VDD3.3_7
SDO_34
SDO_12
LRCKO
BICKO
NC 54
GND_6
VDD3.3_6
EAPD
OUT1_A
OUT1_B
SA
SDA
SCL
XTI
PLL_FILTER
VDDA_PLL
GNDA_PLL
VDD3.3_PLL
CKOUT
NC 26
GND_3
VDD3.3_3
OUT8_B
OUT8_A
OUT7_B
OUT7_A
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
+3.3V
STA309B
Application reference schematic
17/66
Registers
STA309B
7
Registers
7.1
Register summary
Table 8.
Register summary
Addr
Name
D7
D6
D5
D4
D3
D2
D1
D0
Configuration
0x00
CONFA
0x01
COS1
COS0
DSPB
IR1
IR0
MCS2
MCS1
MCS0
ConfB
SAIFB
SAI3
SAI2
SAI1
SAI0
0x02
ConfC
SAOFB
SAO3
SAO2
SAO1
SAO0
0x03
ConfD
MPC
CSZ4
CSZ3
CSZ2
CSZ1
CSZ0
OM1
OM0
0x04
ConfE
C8BO
C7BO
C6BO
C5BO
C4BO
C3BO
C2BO
C1BO
0x05
ConfF
PWMS2
PWMS1
PWMS0
BQL
PSL
DEMP
DRC
HPB
0x06
ConfG
MPCV
DCCV
HPE
AM2E
AME
COD
SID
PWMD
0x07
ConfH
ECLE
LDTE
BCLE
IDE
ZDE
SVE
ZCE
NSBW
0x08
ConfI
EAPD
PSCE
Volume control
0x09
MMUTE
0x0A
Mvol
MV7
MV6
MV5
MV4
MV3
MV2
MV1
MV0
0x0B
C1Vol
C1V7
C1V6
C1V5
C1V4
C1V3
C1V2
C1V1
C1V0
0x0C
C2Vol
C2V7
C2V6
C2V5
C2V4
C2V3
C2V2
C2V1
C2V0
0x0D
C3Vol
C3V7
C3V6
C3V5
C3V4
C3V3
C3V2
C3V1
C3V0
0x0E
C4Vol
C4V7
C4V6
C4V5
C4V4
C4V3
C4V2
C4V1
C4V0
0x0F
C5Vol
C5V7
C5V6
C5V5
C5V4
C5V3
C5V2
C5V1
C5V0
0x10
C6Vol
C6V7
C6V6
C6V5
C6V4
C6V3
C6V2
C6V1
C6V0
0x11
C7Vol
C7V7
C7V6
C7V5
C7V4
C7V3
C7V2
C7V1
C7V0
0x12
C8Vol
C8V7
C8V6
C8V5
C8V4
C8V3
C8V2
C8V1
C8V0
0x13
C1VTMB
C1M
C1VBP
C1VT4
C1VT3
C1VT2
C1VT1
C1VT0
0x14
C2VTMB
C2M
C2VBP
C2VT4
C2VT3
C2VT2
C2VT1
C2VT0
0x15
C3VTMB
C3M
C3VBP
C3VT4
C3VT3
C3VT2
C3VT1
C3VT0
0x16
C4VTMB
C4M
C4VBP
C4VT4
C4VT3
C4VT2
C4VT1
C4VT0
0x17
C5VTMB
C5M
C5VBP
C5VT4
C5VT3
C5VT2
C5VT1
C5VT0
0x18
C6VTMB
C6M
C6VBP
C6VT4
C6VT3
C6VT2
C6VT1
C6VT0
0x19
C7VTMB
C7M
C7VBP
C7VT4
C7VT3
C7VT2
C7VT1
C7VT0
0x1A
C8VTMB
C8M
C8VBP
C8VT4
C8VT3
C8VT2
C8VT1
C8VT0
18/66
MMUTE
Doc ID 022570 Rev 2
STA309B
Registers
Table 8.
Register summary (continued)
Addr
Name
D7
D6
D5
D4
D3
D2
D1
D0
Input mapping
0x1B
C12im
C2IM2
C2IM1
C2IM0
C1IM2
C1IM1
C1IM0
0x1C
C34im
C4IM2
C4IM1
C4IM0
C3IM2
C3IM1
C3IM0
0x1D
C56im
C6IM2
C6IM1
C6IM0
C5IM2
C5IM1
C5IM0
0x1E
C78im
C8IM2
C8IM1
C8IM0
C7IM2
C7IM1
C7IM0
AMEQ0
AutoMode
0x1F
Auto1
AMDM
AMGC2
AMGC1
AMGC0
AMV1
AMV0
AMEQ1
0x20
Auto2
SUB
RSS1
RSS0
CSS1
CSS0
FSS
AMBMXE AMBMME
0x21
Auto3
AMAM2
AMAM1
AMAM0
AMAME
0x22
PreEQ
XO2
XO1
XO0
PEQ4
PEQ3
0x23
Ageq
AGEQ4
0x24
Bgeq
0x25
MSA
AMPS
PEQ2
PEQ1
PEQ0
AGEQ3
AGEQ2
AGEQ1
AGEQ0
BGEQ4
BGEQ3
BGEQ2
BGEQ1
BGEQ0
Cgeq
CGEQ4
CGEQ3
CGEQ2
CGEQ1
CGEQ0
0x26
Dgeq
DGEQ4
DGEQ3
DGEQ2
DGEQ1
DGEQ0
0x27
Egeq
EGEQ4
EGEQ3
EGEQ2
EGEQ1
EGEQ0
C4BLP
C3BLP
C2BLP
C1BLP
Processing loop
0x28
BQlp
C8BLP
C7BLP
C6BLP
C5BLP
0x29
MXlp
C8MXLP
C7MXLP
C6MXLP
C5MXLP C4MXLP
C3MXLP
C2MXLP
C1MXLP
Processing bypass
0x2A
EQbp
C8EQBP
C7EQBP
C6EQBP
C5EQBP C4EQBP
C3EQBP
C2EQBP
C1EQBP
0x2B
ToneBP
C8TCB
C7TCB
C6TCB
C5TCB
C4TCB
C3TCB
C2TCB
C1TCB
TTC3
TTC2
TTC1
TTC0
BTC3
BTC2
BTC1
BTC0
Tone control
0x2C
Tone
Dynamics control
0x2D
C1234ls
C4LS1
C4LS0
C3LS1
C3LS0
C2LS1
C2LS0
C1LS1
C1LS0
0x2E
C5678ls
C8LS1
C8LS0
C7LS1
C7LS0
C6LS1
C6LS0
C5LS1
C5LS0
0x2F
L1ar
L1A3
L1A2
L1A1
L1A0
L1R3
L1R2
L1R1
L1R0
0x30
L1atrt
L1AT3
L1AT2
L1AT1
L1AT0
L1RT3
L1RT2
L1RT1
L1RT0
0x31
L2ar
L2A3
L2A2
L2A1
L2A0
L2R3
L2R2
L2R1
L2R0
0x32
L2atrt
L2AT3
L2AT2
L2AT1
L2AT0
L2RT3
L2RT2
L2RT1
L2RT0
PWM output timing
0x33
C12ot
C2OT2
C2OT1
C2OT0
C1OT2
C1OT1
C1OT0
0x34
C34ot
C4OT2
C4OT1
C4OT0
C3OT2
C3OT1
C3OT0
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Registers
Table 8.
Addr
STA309B
Register summary (continued)
Name
D7
D6
D5
D4
D3
D2
D1
D0
0x35
C56ot
C6OT2
C6OT1
C6OT0
C5OT2
C5OT1
C5OT0
0x36
C78ot
C8OT2
C8OT1
C8OT0
C7OT2
C7OT1
C7OT0
2
I S output channel mapping
0x37
C12om
C2OM2
C2OM1
C2OM0
C1OM2
C1OM1
C1OM0
0x38
C34om
C4OM2
C4OM1
C4OM0
C3OM2
C3OM1
C3OM0
0x39
C56om
C6OM2
C6OM1
C6OM0
C5OM2
C5OM1
C5OM0
0x3A
C78om
C8OM2
C8OM1
C8OM0
C7OM2
C7OM1
C7OM0
CFA9
CFA8
User-defined coefficient RAM
0x3B
Cfaddr1
0x3C
Cfaddr2
CFA7
CFA6
CFA5
CFA4
CFA3
CFA2
CFA1
CFA0
0x3D
B1cf1
C1B23
C1B22
C1B21
C1B20
C1B19
C1B18
C1B17
C1B16
0x3E
B1cf2
C1B15
C1B14
C1B13
C1B12
C1B11
C1B10
C1B9
C1B8
0x3F
B1cf3
C1B7
C1B6
C1B5
C1B4
C1B3
C1B2
C1B1
C1B0
0x40
B2cf1
C2B23
C2B22
C2B21
C2B20
C2B19
C2B18
C2B17
C2B16
0x41
B2cf2
C2B15
C2B14
C2B13
C2B12
C2B11
C2B10
C2B9
C2B8
0x42
B2cf3
C2B7
C2B6
C2B5
C2B4
C2B3
C2B2
C2B1
C2B0
0x43
A1cf1
C3B23
C3B22
C3B21
C3B20
C3B19
C3B18
C3B17
C3B16
0x44
A1cf2
C3B15
C3B14
C3B13
C3B12
C3B11
C3B10
C3B9
C3B8
0x45
A1cf3
C3B7
C3B6
C3B5
C3B4
C3B3
C3B2
C3B1
C3B0
0x46
A2cf1
C4B23
C4B22
C4B21
C4B20
C4B19
C4B18
C4B17
C4B16
0x47
A2cf2
C4B15
C4B14
C4B13
C4B12
C4B11
C4B10
C4B9
C4B8
0x48
A2cf3
C4B7
C4B6
C4B5
C4B4
C4B3
C4B2
C4B1
C4B0
0x49
B0cf1
C5B23
C5B22
C5B21
C5B20
C5B19
C5B18
C5B17
C5B16
0x4A
B0cf2
C5B15
C5B14
C5B13
C5B12
C5B11
C5B10
C5B9
C5B8
0x4B
B0cf3
C5B7
C5B6
C5B5
C5B4
C5B3
C5B2
C5B1
C5B0
0x4C
Cfud
WA
W1
0x4D
MPCC1
MPCC15
MPCC14
MPCC13
MPCC12 MPCC11
MPCC10
MPCC9
MPCC8
0x4E
MPCC2
MPCC7
MPCC6
MPCC5
MPCC4
MPCC3
MPCC2
MPCC1
MPCC0
0x4F
DCC1
DCC15
DCC14
DCC13
DCC12
DCC11
DCC10
DCC9
DCC8
0x50
DCC2
DCC7
DCC6
DCC5
DCC4
DCC3
DCC2
DCC1
DCC0
0x51
PSC1
RCV11
RCV10
RCV9
RCV8
RCV7
RCV6
RCV5
RCV4
0x52
PSC2
RCV3
RCV2
RCV1
RCV0
CNV11
CNV10
CNV9
CNV8
0x53
PSC3
CNV7
CNV6
CNV5
CNV4
CNV3
CNV2
CNV1
CNV0
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Doc ID 022570 Rev 2
STA309B
Table 8.
Addr
Registers
Register summary (continued)
Name
D7
D6
D5
D4
D3
D2
D1
D0
Digital Pop-Free
0x57
PFCXON
0x60
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
Reserved -
-
-
-
-
-
-
-
0x61
Reserved -
-
-
-
-
-
-
-
0x62
Reserved -
-
-
-
-
-
-
-
0x63
Reserved -
-
-
-
-
-
-
-
0x64
Reserved -
-
-
-
-
-
-
-
0x65
Reserved -
-
-
-
-
-
-
-
0x66
RAMPTIM TR7
TR6
TR5
TR4
TR3
TR2
TR1
TR0
0x67
TSPUPT1 TP15
TP14
TP13
TP12
TP11
TP10
TP9
TP8
0x68
TSPUPT0 TP7
TP6
TP5
TP4
TP3
TP2
TP1
TP0
0x69
Reserved -
-
-
-
-
-
-
-
0x6A
Reserved -
-
-
-
-
-
-
-
0x6B
Reserved -
-
-
-
-
-
-
-
0x6C
Reserved -
-
-
-
-
-
-
-
0x70
Reserved -
-
-
-
-
-
-
-
0x71
LSPDWT1 TL15
TL14
TL13
TL12
TL11
TL10
TL9
TL8
0x72
LSPDWT0 TL7
TL6
TL5
TL4
TL3
TL2
TL1
TL
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Registers
STA309B
7.2
Register description
7.2.1
Configuration register A (0x00)
D7
D6
D5
D4
D3
D2
D1
D0
COS1
COS0
DSPB
IR1
IR0
MCS2
MCS1
MCS0
1
0
0
0
0
0
1
1
Bit
RW
RST
Name
0
RW
1
MCS0
1
RW
1
MCS1
2
RW
0
MCS2
Description
Master clock select: selects the ratio between the
input I2S sampling frequency and the input clock
The STA309B supports sampling rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz, 192 kHz, and 2.8224 MHz DSD. Therefore the internal clocks are:
●
65.536 MHz for 32 kHz
●
90.3168 MHz for 44.1 kHz, 88.2 kHz, 176.4 kHz, and DSD
●
98.304 MHz for 48 kHz, 96 kHz, and 192 kHz
The external clock frequency provided to the XTI pin must be a multiple of the input
sampling frequency (fs). The relationship between the input clock and the input sampling
rate is determined by both the MCSn and the IRn (input rate) register bits. The MCSn bits
determine the PLL factor generating the internal clock and the IRn bits determine the
oversampling ratio used internally.
MCS[2:0]
Input sampling rate
IR
fs (kHz)
1XX
011
010
001
000
32, 44.1, 48
00
128 * fs
256 * fs
384 * fs
512 * fs
768 * fs
88.2, 96
01
64 * fs
128 * fs
192 * fs
256 * fs
384 * fs
176.4, 192
10
64 * fs
128 * fs
192 * fs
256 * fs
384 * fs
DSD
11
2 * fs
4 * fs
6 * fs
8 * fs
10 * fs
Interpolation ratio select
Bit
RW
RST
Name
3
RW
0
IR0
4
RW
0
IR1
Description
Interpolation ratio select: selects internal
interpolation ratio based on input I2S sampling
frequency
The STA309B has variable interpolation (oversampling) settings such that internal
processing and FFX output rates remain consistent. The first processing block interpolates
by either 4 times, 2 times, or 1 time (pass-through).
The oversampling ratio of this interpolation is determined by the IR bits.
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STA309B
Registers
I
Input sampling rate
IR[1,0]
1st stage interpolation ratio
Fs (kHz)
00
32
4-times oversampling
00
44.1
4-times oversampling
00
48
4-times oversampling
01
88.2
2-times oversampling
01
96
2-times oversampling
10
176.4
Pass-through
10
192
Pass-through
11
DSD
DSD to 176.4 kHz conversion
Bit
0
RW
RW
RST
0
Name
DSPB
Description
DSP bypass bit:
0: normal operation
1: bypass of biquad and bass/treble functions
Setting the DSPB bit bypasses the biquad function of the FFX core.
COS[1,0]
CKOUT frequency
00
PLL output
01
PLL output / 4
10
PLL output / 8
11
PLL output / 16
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Registers
7.2.2
STA309B
Configuration register B (0x01) - serial input formats
D7
Bit
D6
RW
D5
RST
D4
D3
RW
0
SAI0
1
RW
0
SAI1
2
RW
0
SAI2
3
RW
0
SAI3
D1
D0
SAIFB
SAI3
SAI2
SAI1
SAI0
0
0
0
0
0
Name
0
D2
Description
Serial audio input interface format: determines the
interface format of the input serial digital audio
interface.
Serial data interface
The STA309B audio serial input interfaces with standard digital audio components and
accepts a number of serial data formats. The STA309B always acts a slave when receiving
audio input from standard digital audio components. Serial data for eight channels is
provided using 6 input pins: left/right clock LRCKI (pin 10), serial clock BICKI (pin 11), serial
data 1 and 2 SDI12 (pin 9), serial data 3 and 4 SDI34 (pin 8), serial data 5 and 6 SDI56 (pin
7), and serial data 7 and 8 SDI78 (pin 6). The SAI/SAIFB register (configuration register B,
address 0x01) is used to specify the serial data format. The default serial data format is I2S,
MSB-first. Available formats are shown in the tables that follow.
Bit
4
Note:
RW
RW
RST
0
Name
SAIFB
Description
Determines MSB or LSB first for all SAO formats:
0: MSB first
1: LSB first
Serial input and output formats are specified separately
For example, SAI = 1110 and SAIFB = 1 specifies right-justified 16-bit data, LSB-first.
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STA309B
Registers
The table below lists the serial audio input formats supported by the STA309B as related to
BICKI = 32 * fs, 48 * fs, 64 * fs, where sampling rate, fs = 32, 44.1, 48, 88.2, 96, 176.4,
192 kHz.
BICKI
SAI [3:0]
SAIFB
Interface format
1100
X
I2S 15-bit data
1110
X
Left/right-justified 16-bit data
0100
X
I2S 23-bit data
0100
X
I2S 20-bit data
1000
X
I2S 18-bit data
0100
0
MSB-first I2S 16-bit data
1100
1
LSB-first I2S 16-bit data
0001
X
Left-justified 24-bit data
0101
X
Left-justified 20-bit data
1001
X
Left-justified 18-bit data
1101
X
Left-justified 16-bit data
0010
X
Right-justified 24-bit data
0110
X
Right-justified 20-bit data
1010
X
Right-justified 18-bit data
1110
X
Right-justified 16-bit data
0000
X
I2S 24-bit data
0100
X
I2S 20-bit data
1000
X
I2S 18-bit data
0000
0
MSB-first I2S 16-bit data
1100
1
LSB-first I2S 16-bit data
0001
X
Left-justified 24-bit data
0101
X
Left-justified 20-bit data
1001
X
Left-justified 18-bit data
1101
X
Left-justified 16-bit data
0010
X
Right-justified 24-bit data
0110
X
Right-justified 20-bit data
1010
X
Right-justified 18-bit data
1110
X
Right-justified 16-bit data
32 * fs
48 * fs
64 * fs
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Registers
7.2.3
STA309B
Configuration register C (0x02) - serial output formats
D7
Bit
D6
RW
D5
RST
D4
D3
D2
RW
0
SAO0
1
RW
0
SAO1
2
RW
0
SAO2
3
RW
0
SAO3
D0
SAOFB
SAO3
SAO2
SAIO
SAO0
0
0
0
0
0
Name
0
D1
Description
Serial audio output interface format: determines the
interface format of the output serial digital audio
interface.
The STA309B features a serial audio output interface that consists of 8 channels. The serial
audio output always acts as a slave to the serial audio input interface and, therefore, all
output clocks are synchronous with the input clocks. The output sampling frequency (fs) is
also equivalent to the input sampling frequency. In the case of SACD/DSD and PDM input,
the serial audio output acts as a master with an output sampling frequency of 176.4 kHz.
The output serial format can be selected independently from the input format and is done
via the SAO and SAOFB bits.
Bit
4
RW
RW
RST
0
BICKI = BICKO
Name
SAOFB
Description
Determines MSB or LSB first for all SAO formats:
0: MSB first
1: LSB first
SAO[3:0]
Interface data format
0111
I2S data
1111
Left/right-justified 16-bit data
1110
I2S data
0001
Left-justified data
1010
Right-justified 24-bit data
1011
Right-justified 20-bit data
1100
Right-justified 18-bit data
1101
Right-justified 16-bit data
0000
I2S data
0001
Left-justified data
0010
Right-justified 24-bit data
0011
Right-justified 20-bit data
0100
Right-justified 18-bit data
0101
Right-justified 16-bit data
32 * fs
48 * fs
64 * fs
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STA309B
7.2.4
Registers
Configuration register D (0x03)
D7
D6
D5
D4
D3
D2
D1
D0
MPC
CSZ4
CSZ3
CSZ2
CSZ1
CSZ0
OM1
OM0
1
1
0
0
0
0
1
0
Bit
RW
RST
Name
0
RW
0
OM0
1
RW
1
OM1
Description
FFX power output mode: selects configuration of
FFX output
The FFX power output mode selects how the FFX output timing is configured. Different
power devices use different output modes. The STA50x recommended use is
OM = 10.
OM[1,0]
Output stage - mode
00
STA50x/STA51xB - drop compensation
01
Discrete output stage - tapered compensation
10
STA50x/STA51xB - full power mode
11
Variable drop compensation (CSZn bits)
Bit
RW
RST
Name
2
RW
0
CSZ0
3
RW
0
CSZ1
4
RW
0
CSZ2
5
RW
0
CSZ3
6
RW
1
CSZ4
Description
Contra size register: when OM[1,0] = 11, this register
determines the size of the FFX compensating pulse
from 0 clock ticks to 31 clock periods.
CSZ[4:0]
Compensating pulse size
00000
0 clock period compensating pulse size
00001
1 clock period compensating pulse size
…
…
11111
31 clock period compensating pulse size
Bit
7
RW
RW
RST
1
Name
MPC
Description
Max power correction: setting to 1 enables STA50x
correction for THD reduction near maximum power
output
Setting the MPC bit turns on special processing that corrects the STA50x power device at
high power. This mode should lower the THD+N of a full STA50x FFX system at maximum
power output and slightly below. This mode will only be operational at OM[1,0] = 01.
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Registers
7.2.5
STA309B
Configuration register E (0x04)
D7
D6
D5
D4
D3
D2
D1
D0
C8BO
C7BO
C6BO
C5BO
C4BO
C3BO
C2BO
C1BO
0
0
0
0
0
0
0
0
Bit
RW
RST
Name
0
RW
0
C1BO
1
RW
0
C2BO
2
RW
0
C3BO
3
RW
0
C4BO
4
RW
0
C5BO
5
RW
0
C6BO
6
RW
0
C7BO
7
RW
0
C8BO
Description
Channels 1, 2, 3, 4, 5, 6, 7, and 8 binary output
mode enable bits. A setting of 0 indicates ordinary
FFX tristate output. A setting of 1 indicates binary
output mode
Each individual channel output can be set to output a binary PWM stream. In this mode
output A of a channel will be considered the positive output and output B is the negative
inverse.
7.2.6
Configuration register F (0x05)
D7
D6
D5
D4
D3
D2
D1
D0
PWMS2
PWMS1
PWMS0
BQL
PSL
DEMP
DRC
HPB
0
0
0
0
0
0
0
0
Bit
0
RW
RW
RST
0
Name
Description
High-pass filter bypass bit: setting to one bypasses
the internal AC coupling digital high-pass filter
HPB
The STA309B features an internal digital high-pass filter for the purpose of AC coupling. The
purpose of this filter is to prevent DC signals from passing through an FFX amplifier. DC
signals can cause speaker damage.
If HPB = 1, then the filter that the high-pass filter utilizes is made available as userprogrammable biquad #1.
Bit
1
RW
RW
RST
0
Name
DRC
Description
Dynamic range compression/anti-clipping
0: limiters act in anti-clipping mode
1: limiters act in dynamic range compression mode
Both limiters can be used in one of two ways, anti-clipping or dynamic range compression.
When used in anti-clipping mode the limiter threshold values are constant and dependent on
the limiter settings.
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STA309B
Registers
In dynamic range compression mode the limiter threshold values vary with the volume
settings allowing a nighttime listening mode that provides a reduction in the dynamic range
regardless of the volume level.
Bit
2
RW
RW
RST
0
Name
Description
De-emphasis:
0: no de-emphasis
1: de-emphasis
DEMP
By setting this bit to one, de-emphasis will be implemented on all channels. When this is
used, it takes the place of biquad #7 in each channel and any coefficients using biquad #1
will be ignored. The DSPB (DSP bypass) bit must be set to 0 for de-emphasis to function.
Bit
3
RW
RW
RST
0
Name
Description
Post-scale link:
0: each channel uses individual post-scale value
1: each channel uses channel 1 post-scale value
PSL
Post-Scale functionality can be used for power-supply error correction. For multichannel
applications running off the same power supply, the post-scale values can be linked to the
value of channel 1 for ease of use and in order to update the values faster.
Bit
4
RW
RW
RST
0
Name
Description
Biquad link:
0: each channel uses coefficient values
1: each channel uses channel 1 coefficient values
BQL
For ease of use, all channels can use the biquad coefficients loaded into the channel 1
coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to
be performed once.
Bit
7:5
RW
RW
PWMS[1:0]
RST
00
Name
PWMS[2:0]
Description
PWM speed selection:
PWM output speed
000
Normal speed (384 kHz) (all channels)
001
Half-speed (192 kHz) (all channels)
010
Double-speed (768 kHz) (all channels)
011
Normal speed (channels 1-6), double-speed (channels 7-8)
100
Odd speed (341.3 kHz) (all channels)
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Registers
7.2.7
STA309B
Configuration register G (0x06)
D7
D6
D5
D4
D3
D2
D1
D0
MPCV
DCCV
HPE
AM2E
AME
COD
SID
PWMD
0
0
0
0
0
0
0
0
Bit
0
RW
RST
RW
0
Name
Description
PWMD
PWM output disable:
0: PWM output normal
1: no PWM output
1
RW
0
SID
Serial interface (I2S out) disable:
0: I2S output normal
1: no I2S output
2
RW
0
COD
Clock output disable:
0: clock output normal
1: no clock output
RW
RST
Bit
3
RW
0
Name
Description
AM mode enable:
0: normal FFX operation.
1: AM reduction mode FFX operation
AME
The STA309B features an FFX processing mode that minimizes the amount of noise
generated in the frequency range of AM radio. This mode is intended for use when FFX is
operating in a device with an active AM tuner. The SNR of the FFX processing is reduced to
~83 dB in this mode, which is still greater than the SNR of AM radio.
Bit
4
RW
RW
RST
0
Name
Description
AM2 mode enable:
0: normal FFX operation
1: AM2 reduction mode FFX operation
AM2E
The STA309B features 2 FFX processing modes that minimize the amount of noise
generated in the frequency range of AM radio. This second mode is intended for use when
FFX is operating in a device with an active AM tuner. This mode eliminates the noiseshaper.
Bit
5
RW
RW
RST
0
Name
HPE
Description
FFX headphone enable:
0: channels 7 and 8 normal FFX operation
1: channels 7 and 8 headphone operation
Channels 7 and 8 can be configured to be processed and output in such a manner that
headphones can be driven using an appropriate output device. This signal is a differential
3-wire drive called FFX headphone.
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Doc ID 022570 Rev 2
STA309B
Registers
Bit
RW
6
RW
Bit
0
RW
7
7.2.8
RST
RW
Name
Distortion compensation variable enable:
0: uses preset DC coefficient
1: uses DCC coefficient
DCCV
RST
0
Description
Name
Description
Max power correction variable:
0: uses standard MPC coefficient
1: uses MPCC bits for MPC coefficient
MPCV
Configuration register H (0x07)
D7
D6
D5
D4
D3
D2
D1
D0
ECLE
LDTE
BCLE
IDE
ZDE
SVE
ZCE
NSBW
0
1
1
1
1
1
1
0
Bit
0
Bit
1
RW
RW
RW
RW
RST
0
Name
1
Noise-shaper bandwidth selection:
1: 3rd order NS
0: 4th order NS
NSBW
RST
Description
Name
Description
Zero-crossing volume enable:
1: volume adjustments will only occur at digital zerocrossings
0: volume adjustments will occur immediately
ZCE
The ZCE bit enables zero-crossing volume adjustments. When the volume is adjusted on
digital zero-crossings, no clicks will be audible.
Bit
2
Bit
3
RW
RW
RW
RW
RST
1
Name
1
Soft volume enable:
1: volume adjustments use soft volume
0: volume adjustments occur immediately
SVE
RST
Description
Name
ZDE
Description
Zero-detect mute enable: setting to 1 enables the
automatic zero-detect mute
Setting the ZDE bit enables the zero-detect automatic mute. The zero-detect circuit looks at
the input data of each processing channel after the channel-mapping block. If any channel
receives 2048 consecutive zero-value samples (regardless of fs), then that individual
channel is muted if this function is enabled.
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Registers
STA309B
Bit
4
RW
RW
RST
1
Name
Description
Invalid input detect mute enable:
1: enables the automatic invalid input detect mute
IDE
Setting the IDE bit enables this function, which looks at the input I2S data and will
automatically mute if the signals are perceived as invalid.
Bit
5
RW
RW
RST
1
Name
Description
BCLE
Binary output mode clock loss detection enable
This function detects loss of input MCLK in binary mode and will output 50% duty cycle.
Bit
6
RW
RW
RST
1
Name
Description
LDTE
LRCLK double triggering protection enable
This function actively prevents double triggering of LRCLK.
Bit
7
RW
RW
RST
1
Name
Description
ECLE
Auto EAPD on clock loss
Device power-down signal (EAPD) on clock loss detection. This function is enabled by
default. It is strongly recommended to avoid spurious noise during the on-off sequence. The
STA309B has the ECLE bit set to 0.
7.2.9
Configuration register I (0x08)
D7
D6
D5
D4
D3
D2
D1
D0
EAPD
PSCE
0
0
This feature utilizes an ADC on SDI78 that provides power supply ripple information for
correction. Registers PSC1, PSC2, PSC3 are utilized in this mode.
Bit
0
RW
Bit
7
32/66
RW
RW
RW
RST
0
Name
0
Power supply ripple correction enable:
0: normal operation
1: PSCorrect operation
PSCE
RST
Description
Name
EAPD
Description
External amplifier power-down:
0: external power-stage power-down active
1: normal operation
Doc ID 022570 Rev 2
STA309B
7.2.10
Registers
Master mute register (0x09)
D7
D6
D5
D4
D3
D2
D1
D0
MMUTE
0
7.2.11
Master volume register (0x0A)
D7
D6
D5
D4
D3
D2
D1
D0
MV7
MV6
MV5
MV4
MV3
MV2
MV1
MV0
1
1
1
1
1
1
1
1
Note:
The value of the volume derived from MVOL is dependent on the AMV AutoMode volume
settings.
7.2.12
Channel 1 volume (0x0B)
D7
7.2.13
D6
7.2.15
D4
D3
D2
D1
D0
C1V7
C1V6
C1V5
C1V4
C1V3
C1V2
C1V1
C1V0
0
1
1
0
0
0
0
0
Channel 2 volume (0x0C)
D7
7.2.14
D5
D6
D5
D4
D3
D2
D1
D0
C2V7
C2V6
C2V5
C2V4
C2V3
C2V2
C2V1
C2V0
0
1
1
0
0
0
0
0
Channel 3 volume (0x0D)
D7
D6
D5
D4
D3
D2
D1
D0
C3V7
C3V6
C3V5
C3V4
C3V3
C3V2
C3V1
C3V0
0
1
1
0
0
0
0
0
Channel 4 volume (0x0E)
D7
D6
D5
D4
D3
D2
D1
D0
C4V7
C4V6
C4V5
C4V4
C4V3
C4V2
C4V1
C4V0
0
1
1
0
0
0
0
0
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Registers
7.2.16
STA309B
Channel 5 volume (0x0F)
D7
7.2.17
D6
C5V2
C5V1
C5V0
0
1
1
0
0
0
0
0
Channel 6 volume (0x10)
D6
D5
D4
D3
D2
D1
D0
C6V7
C6V6
C6V5
C6V4
C6V3
C6V2
C6V1
C6V0
0
1
1
0
0
0
0
0
Channel 7 volume (0x11)
D6
D5
D4
D3
D2
D1
D0
C7V7
C7V6
C7V5
C7V4
C7V3
C7V2
C7V1
C7V0
0
1
1
0
0
0
0
0
Channel 8 volume (0x12)
D6
D5
D4
D3
D2
D1
D0
C8V7
C8V6
C8V5
C8V4
C8V3
C8V2
C8V1
C8V0
0
1
1
0
0
0
0
0
Channel 1 volume trim, mute, bypass (0x13)
D6
C1M
C1VBP
0
0
D5
0
D4
D3
D2
D1
D0
C1VT4
C1VT3
C1VT2
C1VT1
C1VT0
1
0
0
0
0
Channel 2 volume trim, mute, bypass (0x14)
D6
C2M
C2VBP
0
0
D5
0
D4
D3
D2
D1
D0
C2VT4
C2VT3
C2VT2
C2VT1
C2VT0
1
0
0
0
0
Channel 3 volume trim, mute, bypass (0x15)
D7
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D0
C5V3
D7
7.2.22
D1
C5V4
D7
7.2.21
D2
C5V5
D7
7.2.20
D3
C5V6
D7
7.2.19
D4
C5V7
D7
7.2.18
D5
D6
C3M
C3VBP
0
0
D5
0
D4
D3
D2
D1
D0
C3VT4
C3VT3
C3VT2
C3VT1
C3VT0
1
0
0
0
0
Doc ID 022570 Rev 2
STA309B
7.2.23
Registers
Channel 4 volume trim, mute, bypass (0x16)
D7
7.2.24
D6
C4M
C4VBP
0
0
D6
C5M
C5VBP
0
0
D2
D1
D0
C4VT4
C4VT3
C4VT2
C4VT1
C4VT0
1
0
0
0
0
D5
0
D6
C6M
C6VBP
0
0
D4
D3
D2
D1
D0
C5VT4
C5VT3
C5VT2
C5VT1
C5VT0
1
0
0
0
0
D5
0
D4
D3
D2
D1
D0
C6VT4
C6VT3
C6VT2
C6VT1
C6VT0
1
0
0
0
0
Channel 7 volume trim, mute, bypass (0x19)
D7
7.2.27
D3
Channel 6 volume trim, mute, bypass (0x18)
D7
7.2.26
0
D4
Channel 5 volume trim, mute, bypass (0x17)
D7
7.2.25
D5
D6
C7M
C7VBP
0
0
D5
0
D4
D3
D2
D1
D0
C7VT4
C7VT3
C7VT2
C7VT1
C7VT0
1
0
0
0
0
Channel 8 volume trim, mute, bypass (0x1A)
D7
D6
C8M
C8VBP
0
0
D5
0
D4
D3
D2
D1
D0
C8VT4
C8VT3
C8VT2
C8VT1
C8VT0
1
0
0
0
0
The volume structure of the STA309B consists of individual volume registers for each
channel and a master volume register that provides an offset to each channel’s volume
setting. There is also an additional offset for each channel called the channel volume trim.
The individual channel volumes are adjustable in 0.5 dB steps from +48 dB to -78 dB. As an
example if C5V = 0xXX or +XXX dB and MV = 0xXX or -XX dB, then the total gain for
channel 5 = XX dB. The channel volume trim is adjustable independently on each channel
from -10 dB to +10 dB in 1 dB steps. The master mute when set to 1 will mute all channels
at once, whereas the individual channel mutes (CnM) will mute only that channel. Both the
master mute and the channel mutes provide a "soft mute" with the volume ramping down to
mute in 8192 samples from the maximum volume setting at the internal processing rate
(~192 kHz). A "hard mute" can be obtained by commanding a value of 0xFF (255) to any
channel volume register or the master volume register. When volume offsets are provided
via the master volume register, any channel whose total volume is less than -91 dB will be
muted. All changes in volume take place at zero-crossings when ZCE = 1 (configuration
register H) on a per-channel basis as this creates the smoothest possible volume
Doc ID 022570 Rev 2
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Registers
STA309B
transitions. When ZCE = 0, volume updates occur immediately. Each channel also contains
an individual channel volume bypass. If a particular channel has volume bypassed via the
CnVBP = 1 register, then only the channel volume setting for that particular channel affects
the volume setting, the master volume setting will not affect that channel. Each channel also
contains a channel mute. If CnM = 1, a soft mute is performed on that channel.
MV[7:0]
Volume offset from channel value
0x00
0 dB
0x01
-0.5 dB
0x02
-1 dB
…
…
0x4C
-38 dB
…
…
0xFE
-127 dB
0xFF
Hardware channel mute
CnV[7:0]
Volume
0x00
+48 dB
0x01
+47.5 dB
0x02
+47 dB
…
…
0x5F
+0.5 dB
0x60
0 dB
0x61
-0.5 dB
…
…
0xFE
-79.5 dB
0xFF
Hardware channel mute
CnVT[4:0]
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Volume
0x00 to 0x06
+10 dB
0x07
+9 dB
…
…
0x0F
+1 dB
0x10
0 dB
0x11
-1 dB
…
…
0x19
-9 dB
0x1A to 0x1F
-10 dB
Doc ID 022570 Rev 2
STA309B
7.2.28
Registers
Channel input mapping channels 1 and 2 (0x1B)
D7
7.2.29
D6
D5
D4
C2IM2
C2IM1
0
0
D1
D0
C2IM0
C1IM2
C1IM1
C1IM0
1
0
0
0
D6
D5
D4
C4IM2
C4IM1
0
1
D3
D2
D1
D0
C4IM0
C3IM2
C3IM1
C3IM0
1
0
1
0
Channel input mapping channels 5 and 6 (0x1D)
D7
7.2.31
D2
Channel input mapping channels 3 and 4 (0x1C)
D7
7.2.30
D3
D6
D5
D4
C6IM2
C6IM1
1
0
D3
D2
D1
D0
C6IM0
C5IM2
C5IM1
C5IM0
1
1
0
0
Channel input mapping channels 7 and 8 (0x1E)
D7
D6
D5
D4
D3
D2
D1
D0
C8IM2
C8M1
C8IM0
C7IM2
C7IM1
C7IM0
1
1
1
1
1
0
Each channel received via I2S can be mapped to any internal processing channel via the
channel input mapping registers. This allows for flexibility in processing, simplifies output
stage designs, and enables the ability to perform crossovers. The default settings of these
registers map each I2S input channel to its corresponding processing channel.
CnIM[2:0]
Serial input from
000
Channel 1
001
Channel 2
010
Channel 3
011
Channel 4
100
Channel 5
101
Channel 6
110
Channel 7
111
Channel 8
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Registers
7.2.32
STA309B
AUTO1 - AutoModes EQ, volume, GC (0x1F)
D7
D6
D5
D4
D3
D2
D1
D0
AMDM
AMGC2
AMGC1
AMGC0
AMV1
AMV0
AMEQ1
AMEQ0
0
0
0
0
0
0
0
0
Bit
1:0
RW
RW
RST
0
Name
AMEQ[1:0]
Description
Biquad 2-6 mode is:
00: user-programmable
01: preset EQ - PEQ bits
10: graphic EQ - xGEQ bits
11: auto volume controlled loudness curve
By setting AMEQ to any setting other than 00 enables AutoMode EQ, biquads 1-5 are not
user programmable. Any coefficient settings for these biquads will be ignored. Also when
AutoMode EQ is used, the pre-scale value for channels 1-6 becomes hard-set to -18 dB.
Bit
3:2
6:4
Bit
7
RW
RW
RW
RW
RW
RST
0
0
Name
AMV[1:0]
AutoMode volume mode (MVOL) is:
00: MVOL 0.5 dB 256 steps (standard)
01: MVOL auto curve 30 steps
10: MVOL auto curve 40 steps
11: MVOL auto curve 50 steps
AMGC[2:0]
AutoMode gain compression/limiters mode is:
000: user programmable GC
001: AC no clipping
010: AC limited clipping (10%)
011: DRC nighttime listening mode
100: DRC TV commercial/channel AGC
101: AC 5.1 no clipping
110: AC 5.1 limited clipping (10%)
RST
0
Description
Name
AMDM
Description
AutoMode 5.1 downmix:
0: normal operation
1: channels 7-8 are 2-channel downmix of channels
1-6
The AutoMode downmix setting uses channels 7-8 of Mix#1 engine and therefore these
channels of this function are fixed and not allowed to be set by the user when in this mode.
Channels 1-6 must be arranged via channel mapping (registers CnIM), if necessary, in the
following manner for this operation:
Channel 1: left
Channel 2: right
Channel 3: left surround
Channel 4: right surround
Channel 5: center
Channel 6: LFE
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Doc ID 022570 Rev 2
STA309B
7.2.33
Registers
AUTO2 - AutoModes bass management2 (0x20)
D7
D6
D5
D4
D3
D2
D1
D0
SUB
RSS1
RSS0
CSS1
CSS0
FSS
AMBMXE
AMBMME
1
0
0
0
0
0
0
0
Bit
0
RW
RW
Bit
1
RW
RW
RST
0
Name
AMBMME
RST
0
Description
0: AutoMode bass management mix disabled
1: AutoMode bass management mix enabled
Name
AMBMXE
Description
0: AutoMode bass management crossover disabled
1: AutoMode bass management crossover enabled
Setting the AMBMME bit enables the proper mixing to take place for various preset bass
management configurations. Setting the AMBMXE bit enables the proper crossover filtering
in biquad #7 to take place. The crossover for bass management is always 2nd order
(24 dB/oct) and the crossover frequency is determined by register bits PREEQ.XO[2:0].
All configurations of Dolby Bass Management can be performed in the IC. These different
configurations are selected as they would be by the end-user.
The AutoMode bass management settings utilize channels 1-6 in the Mix #1 engine,
Channels 1-6 biquad #6, and channels 1-2 in the mix #2 engine in configuration #2. These
functions cannot be user-programmed while the bass management automode is active.
Not all settings are valid as some configurations are unlikely and do not have to be
supported by Dolby specifications.
Automatic crossover settings are provided or custom crossovers can be implemented using
the available programmable biquads.
Input channels must be mapped using the channel-mapping feature in the following manner
for bass management to be performed properly.
1: left front
2: right front
3: left rear
4: right rear
5: center
6: LFE
Bitfield
10
01
00
CSS - center speaker size
Off
Large
Small
RSS - rear speaker size
Off
Large
Small
Doc ID 022570 Rev 2
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Registers
STA309B
Bitfield
1
0
FSS - front speaker size
Large
Small
SUB - subwoofer
On
Off
When AMBMXE = 1, biquad #7 on channels 1-6 are utilized for the bass-management
crossover filter, this biquad is not user-programmable in this mode. The XO settings
determine the crossover frequency used, the crossover is 2nd order for both high-pass and
low-pass with a -3 dB cross point. Higher order filters can be obtained be programming
coefficients in other biquads if desired.
It is recommended to use settings of 120-160 Hz when using small, single driver satellite
speakers as the frequency response of these speakers normally is limited to this region.
7.2.34
AUTO3 - AutoMode AM/pre-scale/bass management scale (0x21)
D7
D6
D4
D3
D2
D1
D0
AMAM2
AMAM1
AMAM0
AMAME
MSA
AMPS
0
0
0
0
0
0
Bit
0
RW
RW
Bit
1
RW
RW
Bit
4
RW
RW
AMAM[2:0]
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D5
RST
0
Name
0
Name
Description
Bass management mix scale adjustment
0: -12 dB scaling on satellite channels in config #1
1: no scaling on satellite channels in config #1
MSA
RST
0
AutoMode pre-scale
0: -18 dB used for pre-scale when AMEQ = 00
1: user-defined pre-scale when AMEQ = 00
AMPS
RST
Description
Name
Description
AutoMode AM enable
0: switching frequency determined by PWMS settings
1: switching frequency determined by AMAM settings
AMAME
48 kHz/96 kHz input Fs
44.1 / 88.2 kHz input Fs
000
0.535 MHz - 0.720 MHz
0.535 MHz - 0.670 MHz
001
0.721 MHz - 0.900 MHz
0.671 MHz - 0.800 MHz
010
0.901 MHz - 1.100 MHz
0.801 MHz - 1.000 MHz
011
1.101 MHz - 1.300 MHz
1.001 MHz - 1.180 MHz
100
1.301 MHz - 1.480 MHz
1.181 MHz - 1.340 MHz
101
1.481 MHz - 1.600 MHz
1.341 MHz - 1.500 MHz
110
1.601 MHz - 1.700 MHz
1.501 MHz - 1.700 MHz
Doc ID 022570 Rev 2
STA309B
7.2.35
Registers
PREEQ - preset EQ settings (0x22)
D7
D6
D5
D4
D3
D2
D1
D0
XO2
XO1
XO0
PEQ4
PEQ3
PEQ2
PEQ1
PEQ0
1
0
1
0
0
0
0
0
Bass management
crossover frequency
XO[2:0]
000
70 Hz
001
80 Hz
010
90 Hz
011
100 Hz
100
110 Hz
101
120 Hz
110
140 Hz
111
160 Hz
PEQ[4:0]
Mode / setting
00000
Flat
00001
Rock
00010
Soft Rock
00011
Jazz
00100
Classical
00101
Dance
00110
Pop
00111
Soft
01000
Hard
01001
Party
01010
Vocal
01011
Hip-Hop
01100
Dialog
01101
Bass-boost #1
01110
Bass-boost #2
01111
Bass-boost #3
10000
Loudness 1
10001
Loudness 2
10010
Loudness 3
10011
Loudness 4
Doc ID 022570 Rev 2
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Registers
7.2.36
STA309B
10100
Loudness 5
10101
Loudness 6
10110
Loudness 7
10111
Loudness 8
11000
Loudness 9
11001
Loudness 10
11010
Loudness 11
11011
Loudness 12
11100
Loudness 13
11101
Loudness 14
11110
Loudness 15
11111
Loudness 16
AGEQ - graphic EQ 80-Hz band (0x23)
D7
7.2.37
D3
D2
D1
D0
AGEQ4
AGEQ3
AGEQ2
AGEQ1
AGEQ0
0
1
1
1
1
D6
D5
D4
D3
D2
D1
D0
BGEQ4
BGEQ3
BGEQ2
BGEQ1
BGEQ0
0
1
1
1
1
D6
D5
D4
D3
D2
D1
D0
CGEQ4
CGEQ3
CGEQ2
CGEQ1
CGEQ0
0
1
1
1
1
DGEQ - graphic EQ 3-kHz band (0x26)
D7
42/66
D4
CGEQ - graphic EQ 1-kHz band (0x25)
D7
7.2.39
D5
BGEQ - graphic EQ 300-Hz band (0x24)
D7
7.2.38
D6
D6
D5
D4
D3
D2
D1
D0
DGEQ4
DGEQ3
DGEQ2
DGEQ1
DGEQ0
0
1
1
1
1
Doc ID 022570 Rev 2
STA309B
7.2.40
Registers
EGEQ - graphic EQ 8-kHz band (0x27)
D7
D6
D5
D4
D3
D2
D1
D0
EGEQ4
EGEQ3
EGEQ2
EGEQ1
EGEQ0
0
1
1
1
1
xGEQ[4:0]
7.2.41
Boost / cut
11111
+16
11110
+15
11101
+14
…
…
10000
+1
01111
0
01110
-1
…
…
00001
-14
00000
-15
Biquad internal channel loop-through (0x28)
D7
D6
D5
D4
D3
D2
D1
D0
C8BLP
C7BLP
C6BLP
C5BLP
C4BLP
C3BLP
C2BLP
C1BLP
0
0
0
0
0
0
0
0
Each internal processing channel can receive two possible inputs at the input to the biquad
block. The input can come either from the output of that channel’s MIX#1 engine or from the
output of the bass/treble (biquad #10) of the previous channel. In this scenario, channel 1
receives channel 8. This enables the use of more than 10 biquads on any given channel at
the expense of losing the number of separate internal processing channels.
Bit
7:0
RW
RW
RST
0
Name
CnBLP
Description
For n = 1 to 8:
0: input from channel n MIX#1 engine output - normal
operation
1: input from channel (n - 1) biquad #10 output - loop
operation
Doc ID 022570 Rev 2
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Registers
7.2.42
STA309B
Mix internal channel loop-through (0x29)
D7
D6
D5
D4
D3
D2
D1
D0
C8MXLP
C7MXLP
C6MXLP
C5MXLP
C4MXLP
C3MXLP
C2MXLP
C1MXLP
0
0
0
0
0
0
0
0
Each internal processing channel can receive two possible sets of inputs at the inputs to the
Mix#1 block. The inputs can come from the outputs of the interpolation block as normally
occurs (CnMXLP = 0) or they can come from the outputs of the Mix#2 block. This enables
the use of additional filtering after the second mix block at the expense of losing this
processing capability on the channel.
Bit
7:0
7.2.43
RW
RW
RST
0
Name
Description
For n = 1 to 8:
0: inputs to channel n MIX#1 engine from interpolation
outputs - normal operation
1: inputs to channel n MIX#1 engine from MIX#2 engine
outputs - loop operation
CnMXLP
EQ bypass (0x2A)
D7
D6
D5
D4
D3
D2
D1
D0
C8EQBP
C7EQBP
C6EQBP
C5EQBP
C4EQCBP C3EQBP
C2EQBP
C1EQBP
0
0
0
0
0
0
0
0
EQ control can be bypassed on a per-channel basis. If EQ control is bypassed on a given
channel, the prescale and all 10 filters (high-pass, biquads, de-emphasis, bass
management crossover, bass, treble in any combination) are bypassed for that channel.
Bit
7:0
7.2.44
RW
RW
RST
0
Name
Description
For n = 1 to 8:
0: perform EQ on channel n - normal operation
1: bypass EQ on channel n
CnEQBP
Tone control bypass (0x2B)
D7
D6
D5
D4
D3
D2
D1
D0
C8TCB
C7TCB
C6TCB
C5TCB
C4TCB
C3TCB
C2TCB
C1TCB
0
0
0
0
0
0
0
0
Tone control (bass/treble) can be bypassed on a per-channel basis. If tone control is
bypassed on a given channel, the two filters that tone control utilizes are made available as
user-programmable biquads #9 and #10.
44/66
Doc ID 022570 Rev 2
STA309B
7.2.45
Registers
Tone control (0x2C)
D7
D6
D5
D4
D3
D2
D1
D0
TTC3
TTC2
TTC1
TTC0
BTC3
BTC2
BTC1
BTC0
0
1
1
1
0
1
1
1
This is the tone control boost / cut as a function of the BTC and TTC bits.
BTC[3:0] / TTC[3:0)
7.2.46
7.2.47
7.2.48
Boost / cut
0000
-12 dB
0001
-12 dB
…
…
0111
-4 dB
0110
-2 dB
0111
0 dB
1000
+2 dB
1001
+4 dB
…
…
1101
+12 dB
1110
+12 dB
1111
+12dB
Channel limiter select channels 1,2,3,4 (0x2D)
D7
D6
D5
D4
D3
D2
D1
D0
C4LS1
C4LS0
C3LS1
C3LS0
C2LS1
C2LS0
C1LS1
C1LS0
0
0
0
0
0
0
0
0
Channel limiter select channels 5,6,7,8 (0x2E)
D7
D6
D5
D4
D3
D2
D1
D0
C8LS1
C8LS0
C7LS1
C7LS0
C6LS1
C6LS0
C5LS1
C5LS0
0
0
0
0
0
0
0
0
Limiter 1 attack/release rate (0x2F)
D7
D6
D5
D4
D3
D2
D1
D0
L1A3
L1A2
L1A1
L1A0
L1R3
L1R2
L1R1
L1R0
0
1
1
0
1
0
1
0
Doc ID 022570 Rev 2
45/66
Registers
7.2.49
STA309B
Limiter 1 attack/release threshold (0x30)
D7
7.2.50
D6
D3
D2
D1
D0
L1AT2
L1AT1
L1AT0
L1RT3
L1RT2
L1RT1
L1RT0
0
1
1
0
1
0
0
1
Limiter 2 attack/release rate (0x31)
D6
D5
D4
D3
D2
D1
D0
L2A3
L2A2
L2A1
L2A0
L2R3
L2R2
L2R1
L2R0
0
1
1
0
1
0
1
0
Limiter 2 attack/release threshold (0x32)
D7
7.2.52
D4
L1AT3
D7
7.2.51
D5
D6
D5
D4
D3
D2
D1
D0
L2AT3
L2AT2
L2AT1
L2AT0
L2RT3
L2RT2
L2RT1
L2RT0
0
1
1
0
1
0
0
1
Bit description
The STA309B includes two independent limiter blocks. The purpose of the limiters is to
automatically reduce the dynamic range of a recording to prevent the outputs from clipping
in anti-clipping mode or to actively reduce the dynamic range for a better listening
environment such as a nighttime listening mode which is often needed for DVDs. The two
modes are selected via the DRC bit in configuration register B, bit 7 address 0x02. Each
channel can be mapped to either limiter or not mapped, meaning that the channel will clip
when 0 dBFS is exceeded. Each limiter will look at the present value of each channel that is
mapped to it, select the maximum absolute value of all these channels, perform the limiting
algorithm on that value, and then, if needed, adjust the gain of the mapped channels in
unison.
The limiter attack thresholds are determined by the LnAT registers. It is recommended in
anti-clipping mode to set this to 0 dBFS, which corresponds to the maximum unclipped
output power of an FFX amplifier. Since gain can be added digitally within the STA309B it is
possible to exceed 0 dBFS or any other LnAT setting. When this occurs, the limiter, when
active, will automatically start reducing the gain. The rate at which the gain is reduced when
the attack threshold is exceeded is dependent upon the attack rate register setting for that
limiter. The gain reduction occurs on a peak-detect algorithm.
The release of the limiter, when the gain is again increased, is dependent on an RMS-detect
algorithm. The output of the volume/limiter block is passed through a RMS filter. The output
of this filter is compared to the release threshold, determined by the release threshold
register. When the RMS filter output falls below the release threshold, the gain is again
increased at a rate dependent upon the release rate register. The gain can never be
increased past it's set value and therefore the release will only occur if the limiter has
already reduced the gain. The release threshold value can be used to set what is effectively
a minimum dynamic range which is helpful as overlimiting can reduce the dynamic range to
virtually zero and cause program material to sound lifeless.
46/66
Doc ID 022570 Rev 2
STA309B
Registers
In AC mode the attack and release thresholds are set relative to full-scale. In DRC mode the
attack threshold is set relative to the maximum volume setting of the channels mapped to
that limiter and the release threshold is set relative to the maximum volume setting, plus the
attack threshold.
Figure 7.
Basic limiter and volume flow diagram
Limiter
RMS
Attenuation
Saturation
Gain/Volume
I nput
Output
Gain
CnLS[1,0]
Channel limiter mapping
00
Channel has limiting disabled
01
Channel is mapped to limiter #1
10
Channel is mapped to limiter #2
LnA[3:0]
Attack rate (dB/ms)
0000
3.1584 (fast)
0001
2.7072
0010
2.2560
0011
1.8048
0100
1.3536
0101
0.9024
0110
0.4512
0111
0.2256
1000
0.1504
1001
0.1123
1010
0.0902
1011
0.0752
1100
0.0645
1101
0.0564
1110
0.0501
1111
0.0451 (slow)
Doc ID 022570 Rev 2
47/66
Registers
STA309B
LnR[3:0]
Release rate (dB/ms)
0000
0.5116 (fast)
0001
0.1370
0010
0.0744
0011
0.0499
0100
0.0360
0101
0.0299
0110
0.0264
0111
0.0208
1000
0.0198
1001
0.0172
1010
0.0147
1011
0.0137
1100
0.0134
1101
0.0117
1110
0.0110
1111
0.0104 (slow)
Anti-clipping (AC)
(dB relative to FS)
LnAT[3:0]
48/66
0000
-12
0001
-10
0010
-8
0011
-6
0100
-4
0101
-2
0110
0
0111
+2
1000
+3
1001
+4
1010
+5
1011
+6
1100
+7
1101
+8
1110
+9
1111
+10
Doc ID 022570 Rev 2
STA309B
Registers
Anti-clipping (AC)
(dB relative to FS)
LnRT[3:0]
0000
-∞
0001
-29 dB
0010
-20 dB
0011
-16 dB
0100
-14 dB
0101
-12 dB
0110
-10 dB
0111
-8 dB
1000
-7 dB
1001
-6 dB
1010
-5 dB
1011
-4 dB
1100
-3 dB
1101
-2 dB
1110
-1 dB
1111
-0 dB
Dynamic range compression (DRC)
(dB relative to volume)
LnAT[3:0]
0000
-31
0001
-29
0010
-27
0011
-25
0100
-23
0101
-21
0110
-19
0111
-17
1000
-16
1001
-15
1010
-14
1011
-13
1100
-12
1101
-10
1110
-7
1111
-4
Doc ID 022570 Rev 2
49/66
Registers
STA309B
Dynamic range compression (DRC)
(db relative to volume + LnAT)
LnRT[3:0]
7.2.53
0000
-∞
0001
-38 dB
0010
-36 dB
0011
-33 dB
0100
-31 dB
0101
-30 dB
0110
-28 dB
0111
-26 dB
1000
-24 dB
1001
-22 dB
1010
-20 dB
1011
-18 dB
1100
-15 dB
1101
-12 dB
1110
-9 dB
1111
-6 dB
Channel 1 and 2 output timing (0x33)
D7
7.2.54
D4
C2OT2
C2OT1
1
0
D3
D2
D1
D0
C2OT0
C1OT2
C1OT1
C1OT0
0
0
0
0
D6
D2
D1
D0
D5
D4
D3
C4OT2
C4OT1
C4OT0
C3OT2
C3OT1
C3OT0
1
1
0
0
1
0
Channel 5 and 6 output timing (0x35)
D7
50/66
D5
Channel 3 and 4 output timing (0x34)
D7
7.2.55
D6
D6
D5
D4
D2
D1
D0
C6OT2
C6OT1
C6OT0
D3
C5OT2
C5OT1
C5OT0
1
0
1
0
0
1
Doc ID 022570 Rev 2
STA309B
7.2.56
Registers
Channel 7 and 8 output timing (0x36)
D7
D6
D5
D4
C8OT2
C8OT1
1
1
D3
D2
D1
D0
C8OT0
C7OT2
C7OT1
C7OT0
1
0
1
1
The centering of the individual channel PWM output periods can be adjusted by the output
timing registers. The PWM slot settings can be chosen to ensure that pulse transitions do
not occur at the same time on different channels using the same power device. There are 8
possible settings, the appropriate setting is based on the application and connections to the
FFX power devices.
CnOT[2:0]
7.2.57
000
1
001
2
010
3
011
4
100
5
101
6
110
7
111
8
Channel I2S output mapping channels 1 and 2 (0x37)
D7
7.2.58
D6
D5
D4
C2OM2
C2OM1
0
0
D3
D2
D1
D0
C2OM0
C1OM2
C1OM1
C1OM0
1
0
0
0
Channel I2S output mapping channels 3 and 4 (0x38)
D7
7.2.59
PWM slot
D6
D5
D4
D3
D2
D1
D0
C4OM2
C4OM1
C4OM0
C3OM2
C3OM1
C3OM0
0
1
1
0
1
0
Channel I2S output mapping channels 5 and 6 (0x39)
D7
D6
D5
D4
C6OM2
C6OM1
1
0
D2
D1
D0
C6OM0
C5OM2
C5OM1
C5OM0
1
1
0
0
Doc ID 022570 Rev 2
D3
51/66
Registers
7.2.60
STA309B
Channel I2S output mapping channels 7 and 8 (0x3A)
D7
D6
D5
D4
D3
D2
D1
D0
C8OM2
C8M1
C8OM0
C7OM2
C7OM1
C7OM0
1
1
1
1
1
0
Each I2S output channel can receive data from any channel output of the volume block.
Which channel a particular I2S output receives is dependent upon that channel’s CnOM
register bits.
CnOM[2:0]
7.2.61
000
Channel 1
001
Channel 2
010
Channel 3
011
Channel 4
100
Channel 5
101
Channel 6
110
Channel 7
111
Channel 8
Coefficient address register 1 (0x3B)
D7
7.2.62
D6
D6
D4
D3
D2
D1
D0
CFA9
CFA8
0
0
D5
D4
D3
D2
D1
D0
CFA7
CFA6
CFA5
CFA4
CFA3
CFA2
CFA1
CFA0
0
0
0
0
0
0
0
0
Coefficient b1 data register, bits 23:16 (0x3D)
D7
52/66
D5
Coefficient address register 2 (0x3C)
D7
7.2.63
Serial output from
D6
D5
D4
D3
D2
D1
D0
C1B23
C1B22
C1B21
C1B20
C1B19
C1B18
C1B17
C1B16
0
0
0
0
0
0
0
0
Doc ID 022570 Rev 2
STA309B
7.2.64
7.2.65
Registers
Coefficient b1 data register, bits 15:8 (0x3E)
D7
D6
D5
D4
D3
D2
C1B15
C1B14
C1B13
C1B12
C1B11
C1B10
C1B9
C1B8
0
0
0
0
0
0
0
0
7.2.67
D6
7.2.70
D4
D3
D2
D1
D0
C1B6
C1B5
C1B4
C1B3
C1B2
C1B1
C1B0
0
0
0
0
0
0
0
0
Coefficient b2 data register, bits 23:16 (0x40)
D7
D6
D5
D4
D3
D2
D1
D0
C2B23
C2B22
C2B21
C2B20
C2B19
C2B18
C2B17
C2B16
0
0
0
0
0
0
0
0
Coefficient b2 data register, bits 15:8 (0x41)
D6
D5
D4
D3
D2
D1
D0
C2B15
C2B14
C2B13
C2B12
C2B11
C2B10
C2B9
C2B8
0
0
0
0
0
0
0
0
Coefficient b2 data register, bits 7:0 (0x42)
D7
7.2.69
D5
C1B7
D7
7.2.68
D0
Coefficient b1 data register, bits 7:0 (0x3F)
D7
7.2.66
D1
D6
D5
D4
D3
D2
D1
D0
C2B7
C2B6
C2B5
C2B4
C2B3
C2B2
C2B1
C2B0
0
0
0
0
0
0
0
0
Coefficient a1 data register, bits 23:16 (0x43)
D7
D6
D5
D4
D3
D2
D1
D0
C1B23
C1B22
C1B21
C1B20
C1B19
C1B18
C1B17
C1B16
0
0
0
0
0
0
0
0
Coefficient a1 data register, bits 15:8 (0x44)
D7
D6
D5
D4
D3
D2
C3B15
C3B14
C3B13
C3B12
C3B11
C3B10
C3B9
C3B8
0
0
0
0
0
0
0
0
Doc ID 022570 Rev 2
D1
D0
53/66
Registers
7.2.71
STA309B
Coefficient a1 data register, bits 7:0 (0x45)
D7
C3B7
0
7.2.72
7.2.73
7.2.74
D6
C3B6
0
7.2.77
C3B3
0
D2
C3B2
0
D1
C3B1
0
D0
C3B0
0
D6
D5
D4
D3
D2
D1
D0
C4B23
C4B22
C4B21
C4B20
C4B19
C4B18
C4B17
C4B16
0
0
0
0
0
0
0
0
Coefficient a2 data register, bits 15:8 (0x47)
D7
D6
D5
D4
D3
D2
C4B15
0
C4B14
0
C4B13
0
C4B12
0
C4B11
0
C4B10
0
D1
C4B9
0
D0
C4B8
0
Coefficient a2 data register, bits 7:0 (0x48)
D6
C4B6
0
D5
C4B5
0
D4
C4B4
0
D3
C4B3
0
D2
C4B2
0
D1
C4B1
0
D0
C4B0
0
Coefficient b0 data register, bits 23:16 (0x49)
D7
D6
D5
D4
D3
D2
D1
D0
C5B23
C5B22
C5B21
C5B20
C5B19
C5B18
C5B17
C5B16
0
0
0
0
0
0
0
0
Coefficient b0 data register, bits 15:8 (0x4A)
D7
D6
D5
D4
D3
D2
C5B15
C5B14
C5B13
C5B12
C5B11
C5B10
C5B9
C5B8
0
0
0
0
0
0
0
0
D1
D0
Coefficient b0 data register, bits 7:0 (0x4B)
D7
54/66
C3B4
0
D3
D7
D7
7.2.76
C3B5
0
D4
Coefficient a2 data register, bits 23:16 (0x46)
C4B7
0
7.2.75
D5
D6
D5
D4
D3
D2
D1
D0
C5B7
C5B6
C5B5
C5B4
C5B3
C5B2
C5B1
C5B0
0
0
0
0
0
0
0
0
Doc ID 022570 Rev 2
STA309B
7.2.78
Registers
Coefficient write control register (0x4C)
D7
D6
D5
D4
D3
D2
D1
D0
WA
W1
0
0
Coefficients for EQ and bass management are handled internally in the STA309B via RAM.
Access to this RAM is available to the user via an I2C register interface.
A collection of I2C registers are dedicated to this function. One contains a coefficient base
address, five sets of three store the values of the 24-bit coefficients to be written or that were
read, and one contains bits used to control the write of the coefficient(s) to RAM. The
following are instructions for reading and writing coefficients.
7.3
7.4
Reading a coefficient from RAM
1.
write top 2 bits of address to I2C register 0x3B
2.
write bottom 8 bits of address to I2C register 0x3C
3.
read top 8 bits of coefficient in I2C address 0x3D
4.
read middle 8 bits of coefficient in I2C address 0x3E
5.
read bottom 8 bits of coefficient in I2C address 0x3F
Reading a set of coefficients from RAM
1.
write top 2 bits of address to I2C register 0x3B
2.
write bottom 8 bits of address to I2C register 0x3C
3.
read top 8 bits of coefficient in I2C address 0x3D
4.
read middle 8 bits of coefficient in I2C address 0x3E
5.
read bottom 8 bits of coefficient in I2C address 0x3F
6.
read top 8 bits of coefficient b2 in I2C address 0x40
7.
read middle 8 bits of coefficient b2 in I2C address 0x41
8.
read bottom 8 bits of coefficient b2 in I2C address 0x42
9.
read top 8 bits of coefficient a1 in I2C address 0x43
10. read middle 8 bits of coefficient a1 in I2C address 0x44
11. read bottom 8 bits of coefficient a1 in I2C address 0x45
12. read top 8 bits of coefficient a2 in I2C address 0x46
13. read middle 8 bits of coefficient a2 in I2C address 0x47
14. read bottom 8 bits of coefficient a2 in I2C address 0x48
15. read top 8 bits of coefficient b0 in I2C address 0x49
16. read middle 8 bits of coefficient b0 in I2C address 0x4A
17. read bottom 8 bits of coefficient b0 in I2C address 0x4B
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Registers
7.5
7.6
STA309B
Writing a single coefficient to RAM
1.
write top 2 bits of address to I2C register 0x3B
2.
write bottom 8 bits of address to I2C register 0x3C
3.
write top 8 bits of coefficient in I2C address 0x3D
4.
write middle 8 bits of coefficient in I2C address 0x3E
5.
write bottom 8 bits of coefficient in I2C address 0x3F
6.
write 1 to W1 bit in I2C address 0x4C
Writing a set of coefficients to RAM
1.
write top 2 bits of starting address to I2C register 0x3B
2.
write bottom 8 bits of starting address to I2C register 0x3C
3.
write top 8 bits of coefficient b1 in I2C address 0x3D
4.
write middle 8 bits of coefficient b1 in I2C address 0x3E
5.
write bottom 8 bits of coefficient b1 in I2C address 0x3F
6.
write top 8 bits of coefficient b2 in I2C address 0x40
7.
write middle 8 bits of coefficient b2 in I2C address 0x41
8.
write bottom 8 bits of coefficient b2 in I2C address 0x42
9.
write top 8 bits of coefficient a1 in I2C address 0x43
10. write middle 8 bits of coefficient a1 in I2C address 0x44
11. write bottom 8 bits of coefficient a1 in I2C address 0x45
12. write top 8 bits of coefficient a2 in I2C address 0x46
13. write middle 8 bits of coefficient a2 in I2C address 0x47
14. write bottom 8 bits of coefficient a2 in I2C address 0x48
15. write top 8 bits of coefficient b0 in I2C address 0x49
16. write middle 8 bits of coefficient b0 in I2C address 0x4A
17. write bottom 8 bits of coefficient b0 in I2C address 0x4B
18. write 1 to WA bit in I2C address 0x4C
The mechanism for writing a set of coefficients to RAM provides a method of updating the
five coefficients corresponding to a given biquad (filter) simultaneously to avoid possible
unpleasant acoustic side-effects.
When using this technique, the 10-bit address specifies the address of the biquad b1
coefficient (for example, decimals 0, 5, 10, 15, …, 100, … 395), and the STA309B generates
the RAM addresses as offsets from this base value to write the complete set of coefficient
data.
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8
Equalization and mixing
Equalization and mixing
Figure 8.
Channel mixer
CxMIX1
Channel 1
CxMIX2
Channel 2
CxMIX3
Channel 3
CxMIX4
Channel x
Channel 4
CxMIX5
Channel 5
CxMIX6
Channel 6
CxMIX7
Channel 7
CxMIX8
Channel 8
8.1
Post-scale
The STA309B provides one additional multiplication after the last interpolation stage and
before the distortion compensation on each channel. This is a 24-bit signed fractional
multiplier.
The scale factor for this multiplier is loaded into RAM using the same I2C registers as the
biquad coefficients and the bass-management.
This post-scale factor can be used in conjunction with an ADC-equipped microcontroller to
perform power-supply error correction. All channels can use channel 1 by setting the postscale link bit.
Table 9.
RAM block for biquads, mixing, and bass management
Index
Index
(decimal)
(hex)
0
0x00
1
Coefficient
Channel 1 - Biquad 1
Default
C1H10 (b1/2)
0x000000
0x01
C1H11 (b2)
0x000000
2
0x02
C1H12 (a1/2)
0x000000
3
0x03
C1H13 (a2)
0x000000
4
0x04
C1H14 (b0/2)
0x400000
5
0x05
C1H20
0x000000
Channel 1 - Biquad 2
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Equalization and mixing
Table 9.
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STA309B
RAM block for biquads, mixing, and bass management (continued)
Index
Index
(decimal)
(hex)
Coefficient
Default
…
…
…
…
…
49
0x31
Channel 1 - Biquad 10
C1HA4
0x400000
50
0x32
Channel 2 - Biquad 1
C2H10
0x000000
51
0x33
C2H11
0x000000
…
…
…
…
…
99
0x63
Channel 2 - Biquad 10
C2HA4
0x4000000
100
0x64
Channel 3 - Biquad 1
C3H10
0x000000
…
…
…
…
…
399
0x18F
Channel 8 - Biquad 10
C8HA4
0x400000
400
0x190
Channel 1 - Pre-Scale
C1PreS
0x7FFFFF
401
0x191
Channel 2 - Pre-Scale
C2PreS
0x7FFFFF
402
0x192
Channel 3 - Pre-Scale
C3PreS
0x7FFFFF
…
…
…
…
…
407
0x197
Channel 8 - Pre-Scale
C8PreS
0x7FFFFF
408
0x198
Channel 1 - Post-Scale
C1PstS
0x7FFFFF
409
0x199
Channel 2 - Post-Scale
C2PstS
0x7FFFFF
…
…
…
…
…
415
0x19F
Channel 8 - Post-Scale
C8PstS
0x7FFFFF
416
0x1A0
Channel 1 - Mix#1 1
C1MX11
0x7FFFFF
417
0x1A1
Channel 1 - Mix#1 2
C1MX12
0x000000
…
…
…
…
…
423
0x1A7
Channel 1 - Mix#1 8
C1MX18
0x000000
424
0x1A8
Channel 2 - Mix#1 1
C2MX11
0x000000
425
0x1A9
Channel 2 - Mix#1 2
C2MX12
0x7FFFFF
…
…
…
…
…
463
0x1CF
Channel 8 - Mix#1 8
C8MX18
0x7FFFFF
464
0x1D0
Channel 1 - Mix#2 1
C1MX21
0x7FFFFF
465
0x1D1
Channel 1 - Mix#2 2
C1MX22
0x000000
…
…
…
…
…
471
0x1D7
Channel 1 - Mix#2 8
C1MX28
0x000000
472
0x1D8
Channel 2 - Mix#2 1
C2MX21
0x000000
473
0x1D9
Channel 2 - Mix#2 2
C2MX22
0x7FFFFF
…
…
…
…
…
527
0x20F
Channel 8 - Mix#2 8
C8MX28
0x7FFFFF
Doc ID 022570 Rev 2
STA309B
Equalization and mixing
8.2
Variable maximum power correction
8.2.1
MPCC1-2 (0x4D, 0x4E)
The MPCC bits determine the 16 MSBs of the MPC compensation coefficient. This
coefficient is used in place of the default coefficient when MPCV = 1.
D7
D6
D5
D4
D3
D2
D1
D0
MPCC15
MPCC14
MPCC13
MPCC12
MPCC11
MPCC10
MPCC9
MPCC8
0
0
1
0
1
1
0
1
D7
D6
D5
D4
D3
D2
D1
D0
MPCC7
MPCC6
MPCC5
MPCC4
MPCC3
MPCC2
MPCC1
MPCC0
1
1
0
0
0
0
0
0
8.3
Variable distortion compensation
8.3.1
DCC1-2 (0x4F, 0x50)
The DCC bits determine the 16 MSBs of the distortion compensation coefficient. This
coefficient is used in place of the default coefficient when DCCV = 1.
D7
D6
D5
D4
D3
D2
DCC15
DCC14
DCC13
DCC12
DCC11
DCC10
DCC9
DCC8
1
1
1
1
0
0
1
1
D7
D6
D5
D4
D3
D1
D2
D0
D1
D0
DCC7
DCC6
DCC5
DCC4
DCC3
DCC2
DCC1
DCC0
0
0
1
1
0
0
1
1
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Equalization and mixing
8.4
STA309B
PSCorrect registers
ADC is used to input ripple data to SDI78. The left channel (7) is used internally. No audio
data can therefore be used on these channels, although all channel mapping and mixing
from other inputs to channels 7 and 8 internally are still valid.
8.4.1
PSC1-2: ripple correction value (RCV) (0x51, 0x52)
This function is equivalent to the negative maximum ripple peak as a percentage of Vcc
(MPR), scaled by the inverse of the maximum ripple p-p as a percentage of full-scale analog
input to ADC. It is represented as a 1.11 signed fractional number.
D7
D6
RCV11
RCV10
RCV9
RCV8
RCV7
RCV6
RCV5
RCV4
0
0
0
0
0
0
0
0
D7
8.4.2
D5
D6
D4
D5
D3
D4
D2
D3
D2
D1
D0
D1
D0
RCV3
RCV2
RCV1
RCV0
CNV11
CNV10
CNV9
CNV8
0
0
0
0
1
1
1
1
PSC3: correction normalization value (CNV) (0x53)
This function is equivalent to 1 / (1+MPR) expressed as a 0.12 unsigned fractional number.
D7
8.5
D6
D5
D4
D3
D2
D1
D0
CNV7
CNV6
CNV5
CNV4
CNV3
CNV2
CNV1
CNV0
1
1
1
1
1
1
1
1
Digital pop-free operation in single-ended mode
The STA309B pop-free feature allows digitally pre-loading the bypass capacitor between the
filtered amplifier output and the load in single-ended applications. Normally, a bypass
capacitor needs to be preloaded to half of the power supply in order to avoid having popnoise at PWM startup.
By enabling the STA309B pop-free feature, it is possible to preload the capacitor using the
amplifier, without needing the resistive partition. By forcing a ramp, it is possible to gradually
load the capacitor from zero to half the supply with the PWM signal starting from near 0%
duty cycle to 50% duty cycle. This “active load” is also faster than the resistive partition
method.
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Equalization and mixing
Figure 9.
Typical single-ended driver - power stage configuration
Cbyp
OUTxy
OUTxy
INxy
STA5xx
STA309B
PWRDN
EAPD
TRI-STATE
The R pull-down resistor (typical value: 3.3 kOhm) is placed to ensure that there is zero
voltage across the load and the bypass capacitor is discharged when the amplifier is in
tristate mode.
8.5.1
PFCXON: digital pop-free register (0x5F)
D7
D6
D5
D4
D3
D2
D1
D0
CH8
CH7
CH6
CH5
CH4
CH3
CH2
CH1
1
1
1
1
1
1
1
1
PFCXON[I]:
when ‘1’, digital pop free is active on channel i+1 when in binary mode (see
Section 7.2.5: Configuration register E (0x04) on page 28)
when ‘0’, digital pop free is not active on channel i+1
8.5.2
Timing settings
Figure 10. Pop-free timing diagram
EAPD
VCC/2
OUT
…
GND
RAMPTIM
TSPUPT
RAMPTIM
LSPDWT
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Equalization and mixing
8.5.3
STA309B
RAMPTIM: ramp duration register (0x66)
D7
D6
D5
D4
D3
D2
D1
D0
TR7
TR6
TR5
TR4
TR3
TR2
TR1
TR0
0
0
0
0
0
1
0
0
This function is the total pop-free ramp duration (same value for ramp-up and ramp-down
and for all channels); default is 400 ms (range is 0-25 sec.).
8.5.4
TSPUPT: waiting time after EAPD (0x67 - 0x68)
D7
D6
D5
D4
D3
D2
D1
D0
TP15
TP14
TP13
TP12
TP11
TP10
TP9
TP8
0
0
0
1
0
0
0
0
D7
D6
D5
D4
D3
D2
D1
D0
TP7
TP6
TP5
TP4
TP3
TP2
TP1
TP0
0
0
0
0
0
0
0
0
This function is the waiting time after EAPD=1 to start ramp-up (same value for all
channels); default is 680 ms (range is 0-11 sec.). In a typical application the EAPD line is
connected to the TRI-STATE input pin of the STA5xx power stage through the RC filter (see
Figure 9 on page 61). TSPUPT shall be greater than the RC time constant.
8.5.5
LSPDWT: waiting time before EAPD (0x71 - 0x72)
D7
D6
D5
D4
D3
D2
D1
D0
TL15
TL14
TLP13
TL12
TL11
TL10
TL9
TL8
0
0
1
0
0
0
0
0
D7
D6
D5
D4
D3
D2
D1
D0
TL7
TL6
TL5
TL4
TL3
TL2
TL1
TL0
0
0
0
0
0
0
0
0
This function is the waiting time after end of ramp-down to assert EAPD=0 (same value for
all channels); default is 1.4 sec. (range is 0-11 sec.). If a resistor is placed in parallel to the
output filter capacitor (see Figure 9 on page 61), the LSPDWT value is 0x00.
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9
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Table 10.
VFQFPN-56 (8 x 8 mm) package dimensions
mm
Reference
Min.
Typ.
Max.
A
0.80
0.90
1.00
A1
0
0.05
D
8.00
D2
See exposed pad variations
E
8.00
E2
See exposed pad variations
b
0.25
0.30
0.35
b1
0.20
0.25
0.30
e (pad pitch)(1)
L1
0.05
0.15
aaa
0.15
bbb
0.10
ddd
0.05
eee
0.08
fff
0.10
ccc
0.10
1. Refer to Figure 11.
Table 11.
Exposed pad variations
D2
E2
Variation
Min.
Typ.
Max
Min.
Typ.
Max.
A
5.85
5.90
5.95
5.85
5.90
5.95
B
4.25
4.30
4.35
4.25
4.30
4.35
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Package information
STA309B
Figure 11. VFQFPN-56 (8 x 8 mm) package outline
The axis of each pad must lie simultaneously in both tolerance zones.
(4) - The terminal A1 corner must be identified on the top surface through inked or lasered mark dot.
A distinguishing feature is allowable on the bottom surface of the package, chamfer at die paddle corner to
identify the terminal A1. Exact shape of each corner is optional.
(5) – All dimensions are in mm.
826820
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10
Revision history
Revision history
Table 12.
Document revision history
Date
Revision
Changes
09-Dec-2011
1
Initial release
24-Jan-2012
2
Updated title and Description on page 1
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STA309B
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