STA310 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STA310' PDF : 90 Pages View PDF
STA310
5.4.1 Output precision and format selection
Output precision is selectable from 16 bits/word to 24 bits/word by setting the output precision select, in the PC-
MCONF (16-, 18-, 20- and 24-bit mode) register.
In 16-bit mode, data may be output either with the most significant bit first or least significant bit first. This is
configured by the contents of the field ORD in the PCMCONF register.
When PCMCONF.PREC is more than 16 bits, 32 bits are output for each channel. In this configuration, the field
FOR of register PCMCONF is used to select Sony or I²S- compatible format. The field DIF of PCMCONF is used
to position the 18, 20 or 24 bits either at the beginning or at the end of each 32-bit frame.
Figure 15. Output formats
LRCLK
16 SCLK cycles
16 SCLK cycles
M
PCM_OUT[2:0] S
LM
SS
L
S
PCMCONF.ORD = 0, PCMCONF.PREC is 16 bits mode
L
PCM_OUT[2:0] S
ML
SS
M
S
PCMCONF.ORD = 1, PCMCONF.PREC is 16 bits mode
LRCLK
32 SCLK cycles
32 SCLK cycles
PCM_OUT[2:0]
M
S
18, 20 or 24 bits
L
S
0
M
S
18, 20 or 24 bits
L
S
0
PCMCONF.FOR = 1
PCMCONF.DIF = 1
PCM_OUT[2:0]
0
M
S
18, 20 or 24 bits
L
S
0
M
S
18, 20 or 24 bits
L PCMCONF.FOR = 0
S PCMCONF.DIF = 0
PCM_OUT[2:0] 0
M
S
18, 20 or 24 bits
L
S
0
0
M
S
18, 20 or 24 bits
L
S
0
PCMCONF.FOR = 0
PCMCONF.DIF = 1
PCM_OUT[2:0]
MSB
M
S
18, 20 or 24 bits
L
S
MSB
M
S
18, 20 or 24 bits
L PCMCONF.FOR = 1
S PCMCONF.DIF = 0
M CONF.PEC
0:16-bit mode
0:16-bit mode
1:18-bit mode
1:18-bit mode
1:18-bit mode
1:18-bit mode
2:20-bit mode
2:20-bit mode
2:20-bit mode
2:20-bit mode
3:24-bit mode
3:24-bit mode
3:24-bit mode
3:24-bit mode
PCM
CONF.ORD
1
0
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
PCM
CONF.FOR
NA
NA
0
0
1
1
0
0
1
1
0
0
1
1
PCM
CONF.DIF
NA
NA
0
1
0
1
0
1
0
1
0
1
0
1
DATA IN SAMPLE
MEMORY DATA
[23:0]
{d23-d8}-{8*0}
{d23-d8}-{8*0}
{d23-d6}-{6*0}
{d23-d6}-{6*0}
{d23-d6}-{6*0}
{d23-d6}-{6*0}
{d23-d4}-{4*0}
{d23-d4}-{4*0}
{d23-d4}-{4*0}
{d23-d4}-{4*0}
{d23-d0}
{d23-d0}
{d23-d0}
{d23-d0}
DATA SENT ON THE
PCM SERIAL OUTPUT
(LEFT BIT FIRST)
{d8-d23}: 16 bits
{d23-d8}: 16 bits
{13*0}{0}{d23-d6}: 32 bits
{0}{d23-d6}{13*0}: 32 bits
{14*d23}{d26*d6}: 32 bits
{d23-d6}{14*0}: 32 bits
{11*0}{0}{d23-d4}: 32 bits
{0}{d23-d4}{11*0}: 32 bits
{12*d23}{d23-d4}: 32 bits
{d23-d4}{12*0}: 32 bits
{6*0}{0}{d23-d0}: 32 bits
{0}{d23-d0}{7*0}: 32 bits
{8*d23}{d23-d0}: 32 bits
{d23-d0}{8*0}: 32 bits
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