CS4205-KQZ Cirrus Logic Inc, CS4205-KQZ Datasheet - Page 38

• Manufacturer Part Number: CS4205-KQZ
• Description: IC CODEC AC97 I2S 48-LQFP
• Manufacturer: Cirrus Logic Inc
• Type: Audio Codec '97r

Specifications of CS4205-KQZ

• Package / Case: 48-LQFP
• Data Interface: Serial
• Resolution (bits): 18, 20 b
• Number Of Adcs / Dacs: 1 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 90 / 90
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Number Of Adc Inputs: 8
• Number Of Dac Outputs: 3
• Conversion Rate: 48 KSPs
• Interface Type: Serial (5-Wire)
• Resolution: 18 bit, 20 bit
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Number Of Channels: 1 ADC, 1 DAC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1182

5.17
SR[15:0]
Default
Writes to the PCM Front DAC Rate Register (Index 2Ch) and the PCM L/R ADC Rate Register (Index 32h) are only
available in Variable Rate PCM Audio mode when the VRA bit in the Extended Audio Status/Control Register
(Index 2Ah) is ‘set’. If VRA = 0, writes to the register are ignored and the register will always read BB80h. Writes to
the Mic ADC Rate Register (Index 34h) are only available in Variable Rate Mic Audio mode when the VRM bit in the
Extended Audio Status/Control Register (Index 2Ah) is ‘set’. If VRM = 0, writes to the register are ignored and the
register will always read BB80h. Table 11 lists the SRC registers and their corresponding SRC enable bit.
38
SR15 SR14 SR13 SR12 SR11 SR10
D15
Audio Sample Rate Control Registers (Index 2Ch - 34h)
D14
D13
Sample Rate
11,025
13,714
16,000
22,050
24,000
32,000
44,100
48,000
8,000
9,600
(Hz)
playback and capture sample rates. The PCM Front DAC Rate Register (Index 2Ch) controls
the Front Left and Front Right DAC sample rates. The PCM L/R ADC Rate Register
(Index 32h) controls the Left and Right ADC sample rates. The Mic ADC Rate Register (Index
34h) controls the Microphone ADC sample rate. There are ten sample rates directly support-
ed by this register, shown in Table 12. Any value written to this register not contained in
Table 12 is not directly supported and will be decoded according to the ranges indicated in
the table. The range boundaries have been chosen so that only bits SR[15:11] of each regis-
ter will have to be considered. All register read transactions will reflect the actual value stored
(column 2 in Table 12) and not the one attempted to be written.
Sample Rate Select. The Audio Sample Rate Control Registers (Index 2Ch - 34h) control
BB80h. This value corresponds to 48 kHz sample rate.
D12
Table 12. Directly Supported SRC Sample Rates for the CS4205
D11
Register
Table 11. Audio Sample Rate Control Register Index
Index
2Ch
32h
34h
content (hex value)
SR[15:0], register
D10
5DC0
AC44
7D00
BB80
1F40
2B11
3E80
2580
3592
5622
PCM Front DAC Rate
SR9
PCM L/R ADC Rate
D9
Mic ADC Rate
SR8
D8
SRC
SR7
range (hex value)
SR[15:0], decode
D7
B000 - FFFF
9000 - AFFF
0000 - 1FFF
2000 - 27FF
2800 - 2FFF
3000 - 37FF
3800 - 47FF
4800 - 57FF
5800 - 6FFF
7000 - 8FFF
SR6
D6
SRC Enable Bit
(Index 2Ah)
SR5
D5
VRM
VRA
VRA
SR4
D4
SR[15:11], decode
range (bin value)
00100 - 00100
00101 - 00101
01001 - 01010
10010 - 10101
00000 - 00011
00110 - 00110
00111 - 01000
01011 - 01101
01110 - 10001
10110 - 11111
SR3
D3
SR2
D2
CS4205
SR1
D1
DS489PP4
SR0
D0