PNX1311EH NXP Semiconductors, PNX1311EH Datasheet - Page 149
PNX1311EH
Manufacturer Part Number
PNX1311EH
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1311EH.pdf
(548 pages)
Specifications of PNX1311EH
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Philips Semiconductors
Table 9-5. AO Serial Framing Control Fields
POLARITY
LEFTPOS(9)
RIGHTPOS(9)
DATAMODE
SSPOS
CLOCK_EDGE 0 ⇒ the parallel to serial converter samples
WS_PULSE
NR_CHAN
Field Name
0 ⇒ serial frame starts with an AO_WS
1 ⇒ serial frame starts with an AO_WS
This bit should NOT be changed during
operation of the AO unit, i.e. only update this
bit when TRANS_ENABLE = 0.
Defines the bit position within a serial frame
where the first data bit of the left channel is
placed. Reset default ‘0’.
Defines the bit position within a serial frame
where the first data bit of the right channel is
placed. Reset default ‘0’.
0 ⇒ MSB first (RESET default)
1 ⇒ LSB first
Start/Stop bit position. Reset default 0. Note
that SSPOS is a 5-bit field, with SSPOS bit 4
not-adjacent. This is for backwards compati-
bility in 16 bits/sample modes with TM-1000/
1100.
• If DATAMODE=MSB first, transmission
• If DATAMODE=LSB first, SSPOS deter-
See
1 ⇒ the parallel to serial converter samples
0 ⇒ emit 50% AO_WS (RESET default).
1 ⇒ emit single AO_SCK cycle AO_WS
00 ⇒ Only AO_SD1 is active
01 ⇒ AO_SD1 and 2 are active
10 ⇒ AO_SD1, 2 and 3 are active
11 ⇒ AO_SD1..SD4 are active
Each SD output either receives 1 or 2 chan-
nels depending on TRANS_MODE mono
resp. stereo. Non-active channels receive 0
value samples. In mono modes, each chan-
nel of a SD output receives identical left &
right samples. See also
starts with the MSB of the sample, i.e. bit
15 for 16 bits/sample modes or bit 31 for
32 bits/sample modes. SSPOS determines
the bit index (0..31) in the parallel input
word of the last transmitted data bit.
mines the bit index (0..31) in the parallel
word of the first transmitted data bit. Bits
SSPOS up to/including the MSB are trans-
mitted, i.e. up to bit 15 in 16 bits/sample
mode and bit 31 in 32 bits/sample mode.
negedge (RESET default)
posedge
Table 9-6
AO_WS on positive edges of AO_SCK
and outputs data on the negative edge
of AO_SCK (RESET default).
AO_WS on negative edges of AO_SCK
and outputs data on positive edges of
AO_SCK.
for more information.
Description
Table
9-10.
Every serial frame transmits a single left and right chan-
nel sample, and optional codec control data to each D/A
converter. The left and right sample data can be in an
LSB first or MSB first form, at an arbitrary serial frame bit
position, and with an arbitrary length.
In MSB-first mode (DATAMODE = 0), the parallel to se-
rial converter sends the value of LEFT[MSB] in bit posi-
tion LEFTPOS in the serial frame. Subsequently, bits
from decreasing bit positions in the LEFT data word, up
to and including LEFT[SSPOS], are transmitted in order.
In LSB-first mode (DATAMODE = 1), the parallel-to-seri-
al converter sends the value of LEFT[SSPOS] in bit po-
sition LEFTPOS in the serial frame. Subsequent bits
from the LEFT data word, up to and including
LEFT[MSB], are transmitted in order.
the transmitted bits in different modes.
Table 9-6. Bits transmitted for each memory data
item S
Frame bits that do not belong to either LEFT[MSB:SS-
POS] or RIGHT[MSB:SSPOS] or a codec control field
(Section 9.7, “Codec
This zero extension ensures that PNX1300 can be used
in combination with D/A converters of higher precision
than the actual number of transmitted bits in the current
operating mode, e.g. 18-bit D/As operating with 16-bit
memory data.
9.6.1
Due to the implementation, there is a minimum serial
frame length required that is operating mode dependent.
This is shown in
Table 9-7. Minimum serial frame length in bits
PRELIMINARY SPECIFICATION
16 bits/sample, MSB-first
16 bits/sample, LSB-first
32 bits/sample, MSB-first
32 bits/sample, LSB-first
16 bits/sample, mono
32 bits/sample, mono
16 bits/sample, stereo
32 bits/sample, stereo
operating mode
operating mode
Serial Frame Limitations
Table
Control”) are shifted out as zero.
9-7.
minimum serial frame length
S[SSPOS] S[15]
S[SSPOS] S[31]
S[15]
S[31]
first
bit
13 bits
13 bits
13 bits
36 bits
S[SSPOS] 0..15
S[SSPOS] 0..31
Table
last
bit
Audio Out
9-6. shows
0..15
0..31
SSPOS
values
valid
9-5
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