CS4205-KQZ Cirrus Logic Inc, CS4205-KQZ Datasheet - Page 20

• 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

4.1
In the serial data output frame, data is passed on the SDATA_OUT pin to the CS4205 from the AC ’97
controller. Figure 14 illustrates the serial port timing.
The PCM playback data being passed to the CS4205 is shifted out MSB first in the most significant bits
of each slot. Any PCM data from the AC ’97 controller that is not 20 bits wide should be left justified in
its corresponding slot and dithered or zero-padded in the unused bit positions.
Bits that are reserved should always be ‘cleared’ by the AC ’97 controller.
4.1.1 Serial Data Output Slot Tags (Slot 0)
Valid Frame
Slot 1 Valid
Slot 2 Valid
Slot [3:11] Valid
Slot 12 Valid
Codec ID[1:0]
4.1.2 Command Address Port (Slot 1)
R/W
RI[6:0]
20
Frame
Bit 15
Valid
Bit 19
R/W
Slot 1
AC-Link Serial Data Output Frame
Valid
RI6
14
18
Slot 2
RI5
Valid
17
13
RI4
16
Slot 3
for the CS4205 or data for read/write operations. When ‘set’, at least one of the other AC-link
slots contains valid data. If this bit is ‘clear’, the remainder of the frame is ignored.
slots. If a bit is ‘set’, the corresponding output slot contains valid data. If a bit is ‘cleared’, the
corresponding slot will be ignored.
frame. Codec ID[1:0] = 00 indicates the primary codec is being accessed. Codec ID[1:0] = 01,
10, or 11 indicates one of three possible secondary codecs is being accessed. A Codec ID
value of 01, 10, or 11 also indicates a valid read/write address and/or valid register write data
for a secondary codec.
bits will occur in the AC ’97 2.x audio codec. When the bit is ‘cleared’, a write will occur. For
any read or write access to occur, the Valid Frame bit (F0) must be ‘set’ and the Codec ID[1:0]
bits (F[14:15]) must match the Codec ID of the AC ’97 2.x audio codec being accessed. Ad-
ditionally, for a primary codec, the Slot 1 Valid bit (F1) must be ‘set’ for a read access and
both the Slot 1 Valid bit (F1) and the Slot 2 Valid bit (F2) must be ‘set’ for a write access. For
a secondary codec, both the Slot 1 Valid bit (F1) and the Slot 2 Valid bit (F2) must be ‘cleared’
for read and write accesses. See Figure 14 for bit frame positions.
CS4205. All registers are defined at word addressable boundaries. The RI0 bit must be ‘clear’
to access CS4205 registers.
Valid
The Valid Frame bit determines if any of the following slots contain either valid playback data
The Slot 1 Valid bit indicates a valid register read/write address for a primary codec.
The Slot 2 Valid bit indicates valid register write data for a primary codec.
The Slot [3:11] Valid bits indicate the validity of data in their corresponding serial data output
The Slot 12 Valid bit indicates if output Slot 12 contains valid GPIO control data.
The Codec ID[1:0] bits determine which codec is being accessed during the current AC-link
Read/Write. When this bit is ‘set’, a read of the AC ’97 register specified by the register index
Register Index. The RI[6:0] bits contain the 7-bit register index to the AC ’97 registers in the
12
RI3
15
Slot 4
Valid
11
RI2
14
Slot 5
Valid
RI1
10
13
RI0
Slot 6
12
Valid
9
11
Slot 7
Valid
8
10
Slot 8
Valid
7
9
Slot 9
Valid
8
6
Slot 10
7
Valid
5
Reserved
6
Slot 11
Valid
4
5
Slot 12
Valid
4
3
3
Res
2
2
Codec
CS4205
ID1
DS489PP4
1
1
Codec
ID0
0
0