CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 93

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

AC97 Audio Codec Controller
Slot 11: Modem Headset DAC
Outputs the headset DAC data (16-bit resolution, MSB first,
unused LSBs = 0).
Slot 12: GPIO Control
This slot allows the ACC to set the value of the AC97
codec’s GPIO output pins.
bits [19:4]
bits [3:0]
5.3.4.3
The audio input frame data streams correspond to the time
division multiplexed bundles of all digital input data coming
from the AC97 codec. Each input frame contains 13, 20-bit
incoming data slots, except for slot 0; it is 16 bits. Slot 0 is a
dedicated slot used for the AC Link protocol.
An audio input frame begins with a low-to-high transition of
the AC_S_SYNC signal. AC_S_SYNC is synchronous to
the rising edge of AC_CLK. The AC97 codec samples the
AC_S_SYNC signal on the immediately following falling
edge of the bit clock. The AC97 codec transmits data on
each following rising edge of AC_CLK. The ACC samples
the data on the falling edges of AC_CLK.
The serial input stream is MSB justified (MSB first) within
each slot, and all non-valid bit positions stuffed with zeroes
by the AC97 codec.
Slot 0: TAG
The first bit of the TAG slot (bit 15) is the Codec_Ready bit.
The next 12 bits indicate the validity of the next 12 data
slots.
Slot 1: Status Address / SLOTREQ Bits
The status address is the echo of the register address
(index) that was sent to the codec on output slot 1 of the
previous output frame. It indicates the address (index) of
the register whose data is being returned in slot 2 of the
input frame.
bit 19
bits [18:12]
bits [11:2]
bits [1:0]
The SLOTREQ bits support the variable sample rate sig-
naling protocol. With normal 48 kHz operation, these bits
are always zero. When the AC97 codec is configured for a
lower sample rate, some output frames will not contain
samples because the AC Link always outputs frames at 48
kHz. The SLOTREQ bits serve as the codec’s instrument
to tell the ACC whether it needs a sample for a given slot
AMD Geode™ CS5535 Companion Device Data Book
AC Link Input Frame (AC_S_IN, AC_S_IN2)
Value of the GPIO pins
(Up to 16 can be implemented)
Reserved
Reserved
(Stuffed with 0s)
Control Register Index
(Echo of register index for which data
is being returned)
SLOTREQ bits
(For variable sampling rate)
Reserved
(Stuffed with 0s)
on the next output frame. For each bit: 0 = Send data; 1 =
Do NOT send data. If the codec does not request data for a
given slot, the ACC should tag that slot invalid and not
send PCM data. The mapping between SLOTREQ bits and
output slots is given in Table 5-5. The SLOTREQ bits are
independent of the validity of slot 1, and slot 1 will only be
tagged valid by the codec if it contains a register index.
Slot 2: Status Data
The status data slot delivers 16-bit control register read
data.
bits [19:4]
bits [3:0]
Slot 3: PCM Record Left Channel
Contains the left channel ADC input data (16-bit resolution,
MSB first, unused LSBs = 0).
Slot 4: PCM Record Right Channel
Contains the right channel ADC input data (16-bit resolu-
tion, MSB first, unused LSBs = 0).
Slot 5: Modem Line 1 ADC
Contains the modem line 1 ADC input data (16-bit resolu-
tion, MSB first, unused LSBs = 0).
Slot 6: Optional Microphone Record Data
Contains the microphone ADC input data (16-bit resolution,
MSB first, unused LSBs = 0).
Slots 7-10: Not Used
Slots 7-10 are reserved.
Table 5-5. SLOTREQ to Output Slot Mapping
Bit
11
10
9
8
7
6
5
4
3
2
Request
Slot 10
Slot 11
Slot 12
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Slot 8
Slot 9
Slot
(Stuffed with 0s if slot 2 is tagged
Reserved
(Stuffed with 0s)
Control Register Read Data
“invalid” by slot 0)
Notes
Left Channel Out (BM0)
Right Channel Out (BM0)
Modem Line 1 Out (BM2)
Center Out (BM4 if selected)
Left Surround Out (BM6)
Right Surround Out (BM6)
LFE Out (BM7)
Not Supported
Handset Out (BM4 if selected)
Not Supported
31506B
93