cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 83

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

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ACC Functional Description
4.3.4
4.3.4.1
The following figures outline the slot definitions and timing scheme of the AC Link serial protocol.
(Outgoing Stream)
(Incoming Stream)
AC_CLK
AC_S_OUT
AC_CLK
AC_S_SYNC
AC_S_IN or AC_S_IN2
AC_S_SYNC
End of
Previous Frame
End of
Previous Frame
or AC_S_IN2
AC_S_SYNC
AC_S_OUT
12.288 MHz (81.4 ns)
12.288 MHz (81.4 ns)
Codec Interface
AC_S_IN
Frame
Valid
Ready
AC Link Serial Interface Protocol
Codec
Slot #
Slot 1 Slot 2
Slot 1 Slot 2
(“1” = Time slot contains valid PCM data)
(“1” = Time slot contains valid PCM data)
Tag Phase
Tag Phase
Phase
TAG
Time slot “valid” bits
TAG
TAG
Time slot “valid” bits
0
STATUS
Slot 12
ADDR
ADDR
CMD
Slot 12
1
STATUS
“0”
DATA
DATA
“0”
CMD
2
“0”
(Continued)
Figure 4-5. AC Link Output Frame
Figure 4-4. AC Link Slot Scheme
“0”
Figure 4-6. AC Link Input Frame
LEFT
LEFT
PCM
PCM
3
“0”
“0”
RIGHT
RIGHT
PCM
PCM
19
“19”
4
Slot 1
48 kHz (20.8 µs)
48 kHz (20.8 µs)
LINE1
LINE1
Slot 1
DAC
ADC
5
83
0
PCM
CEN
ADC
0
Data Phase
MIC
6
19
19
L SUR R SUR
RSVD
PCM
Slot 2
7
Slot 2
Data Phase
Data Phase
RSVD
PCM
8
0
0
RSVD
19
PCM
LFE
19
9
Slot 3
Slot 3
Slot 3
RSVD
RSVD
10
0
0
HSET
HSET
DAC
ACD
11
STATUS
CNTL
GPIO
GPIO
19
12
19
Slot 12
Slot 12
Revision 0.8
0
0