CS8415A-IZ CIRRUS [Cirrus Logic], CS8415A-IZ Datasheet - Page 30

• Manufacturer Part Number: CS8415A-IZ
• Description: 96 kHz DIGITAL AUDIO INTERFACE RECEIVER
• Manufacturer: CIRRUS [Cirrus Logic]

10. HARDWARE MODE
The CS8415A has a hardware mode which allows
using the device without a microcontroller. Hard-
ware mode is selected by connecting the H/S pin
to VL+. Various pins change function in hardware
mode, described in the hardware mode pin defini-
tion section.
Hardware mode data flow is shown in Figure 9. Au-
dio data is input through the AES3 receiver, and
routed to the serial audio output port. The PRO,
COPY, ORIG, EMPH, and AUDIO channel status
bits are output on pins. The decoded C and U bits
are also output, clocked at both edges of OLRCK
30
OF1 - Left Justified
OF2 - I
OF3 - Right Justified, master mode only
OF4 - Direct AES3 data
2
S 24-bit data
RXP
RXN
SDOUT
LO
HI
-
-
-
-
RM CK
Power supply pins (VD+, VA+, DGND, AGND) & the reset pin (RST) and the PLL filter pin (FILT)
are omitted from this diagram. Please refer to the Typical Connection Diagram for hook-up details.
Table 2. Equivalent Software Mode Bit Definitions
AES3 Rx
&
Decoder
RERR
Table 3. Hardware Mode Start-up Options
ORIG
LO
LO
HI
HI
-
-
NVERR
Figure 9. Hardware Mode
CHS
EMPH
SOSF
LO
LO
HI
HI
-
-
0
0
0
0
COPY ORIG
C & U bit Data Buffer
V L +
SORES1/0
H/S
(master mode only, see Figure 7).The current au-
dio sample is passed unmodified to the serial audio
output port if the validity bit is high, or a parity, bi-
phase, or PLL lock error occurs.
10.1
In hardware mode, only a limited number of alter-
native serial audio port formats are available.
Table 2 defines the equivalent software mode bit
settings for each format.
shown in Table 3, and allow choice of the serial au-
dio output port as a master or slave, and the serial
audio port format.
Serial Output Port is Master
00
00
00
EM PH
11
Serial Output Port is Slave
Direct AES3 data
PRO AUDIO
I2S 24-bit data
Right Justified
Left Justified
Serial Audio Port Formats
Function
SOJUST
0
0
1
0
Serial
Audio
Output
RCBL
SODEL
0
1
0
0
OLRCK
OSCLK
SDOUT
C
U
Start-up options are
SOSPOL
0
0
0
0
CS8415A
SOLRPOL
0
1
0
0