CS8420-DSZR Cirrus Logic Inc, CS8420-DSZR Datasheet - Page 55

• Manufacturer Part Number: CS8420-DSZR
• Description: IC,Digital Audio Sample Rate Converter,SOP,28PIN
• Manufacturer: Cirrus Logic Inc

DS245F4
13. HARDWARE MODES
13.1
13.1.1 Hardware Mode Definitions
13.1.2 Serial Audio Port Formats
OF1 - Left-Justified
OF2 - I²S 24-bit data
OF3 - Right-Justified, Master
mode only
OF4 - I²S 16-bit data
OF5 - Direct AES3 data
IF1 - Left-Justified
IF2 - I²S
IF3 - Right-Justified 24-bit data
IF4 - Right-Justified 16-bit data
Overall Description
The CS8420 has six Hardware modes, which allow use of the device without using a micro-controller to ac-
cess the device control registers and CS & U data. The flexibility of the CS8420 is necessarily limited in
Hardware mode. Various pins change function in Hardware mode, and various data paths are also possible.
These alternatives are identified by Hardware mode numbers 1 through 6. The following sections describe
the data flows and pin definitions for each Hardware mode.
Hardware mode is selected by connecting the H/S pin to ‘1’. In Hardware mode, 3 pins (DFC0, DFC1 &
S/AES) determine the Hardware mode number, according to
sively in Hardware mode. Options include whether the serial audio output ports are master or slave, the
serial audio ports’ format and whether TCBL is an input or an output. Which output pins are used to set
which modes depends on which Hardware mode is being used.
In Hardware mode, only a limited number of alternative serial audio port formats are available. These for-
mats are described by Tables
format. Timing diagrams are shown in Figures
For each Hardware mode, the following pages contain a data flow diagram, a pin-out drawing, a pin de-
scriptions list and a definition of the available start-up options.
Table 6. Serial Audio Output Formats Available in Hardware Mode
Table 7. Serial Audio Input Formats Available in Hardware Mode
DFC1 DFC0 S/AES
0
0
0
1
1
1
0
0
1
0
1
1
SOSF
Table 5. Hardware Mode Definitions
SISF
6
0
0
0
0
0
0
0
0
0
and 7, which define the equivalent Software mode bit settings for each
0
1
0
1
-
-
SORES1/0
SIRES1/0
1 - Default Data Flow, AES3 input
2 - Default Data Flow, serial input
3 - Transceive Flow, with SRC
4 - Transceive Flow, no SRC
5 - AES3 Rx only, AES3 input
6 - AES3 Tx only, serial input
00
00
00
10
00
00
00
10
11
Hardware Mode Number
17
and 18.
SOJUST
SIJUST
0
0
1
0
0
0
0
1
1
Table
SODEL
SIDEL
5. Start-up options are used exten-
0
1
0
1
0
0
1
0
0
SOSPOL
SISPOL
1
0
0
0
1
1
0
0
0
SOLRPOL
SILRPOL
CS8420
0
1
0
1
0
0
1
0
0
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