CS8415A-CSR View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
CS8415A-CSR Datasheet PDF : 46 Pages
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CS8415A
10.HARDWARE MODE
The CS8415A has a hardware mode which allows using the device without a microcontroller. Hardware mode is
selected by connecting the H/S pin to VL+. Various pins change function in hardware mode, described in the hard-
ware mode pin definition section.
Hardware mode data flow is shown in Figure 10. Audio 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 (master mode only, see Figure 7).The cur-
rent audio 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 Serial Audio Port Formats
In hardware mode, only a limited number of alternative serial audio port formats are available. Table 2 de-
fines the equivalent software mode bit settings for each format. Start-up options are shown in Table 3, and
allow choice of the serial audio output port as a master or slave, and the serial audio port format.
OF1 - Left Justified
OF2 - I²S 24-bit data
OF3 - Right Justified, master mode only
OF4 - Direct AES3 data
SOSF
0
0
0
0
SORES1/0
00
00
00
11
SOJUST
0
0
1
0
SODEL
0
1
0
0
Table 2. Equivalent Software Mode Bit Definitions
SOSPOL SOLRPOL
0
0
0
1
0
0
0
0
SDOUT
LO
HI
-
-
-
-
ORIG EMPH
Function
-
-
Serial Output Port is Slave
-
-
Serial Output Port is Master
LO
LO
Left Justified
LO
HI
I²S 24-bit data
HI
LO
Right Justified
HI
HI
Direct AES3 data
Table 3. Hardware Mode Start-Up Options
VL+
H/S
RXP
RXN
AES3 Rx
&
Decoder
Serial
Audio
O u tp u t
OLRCK
OSCLK
SDOUT
C & U bit Data Buffer
C
U
RMCK RERR NVERR CHS COPY ORIG EMPH PRO AUDIO RCBL
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.
Figure 10. Hardware Mode
32
DS470F4
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