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NXP Semiconductors
PNX15xx/952x Series
Volume 1 of 1
Chapter 16: Audio Input
PNX15XX_PNX952X_SER_N_4
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 4.0 — 03 December 2007
16-544
30:22
VALIDPOS
R/W
0
Denes bit position within a serial frame where the valid bit is found.
21:13
LEFTPOS
R/W
0
Denes bit position within a serial frame where the rst data bit of
the left channel is found.
12:4
RIGHTPOS
R/W
0
Denes bit position within a serial frame where the rst data bit of
the right channel is found.
3:0
SSPOS_3_0
R/W
0
Start/Stop bit position.
If DATAMODE = MSB rst, SSPOS determines the bit index (0..15)
for 16 bit samples and (0...31) for 32 bit samples, in the parallel
word of the
last data bit. Bits 15 or 31 (MSB) up to and including
SSPOS are taken in order from the serial frame data. All other bits
are set to zero.
If DATAMODE = LSB rst, SSPOS determines the bit index (0..15)
for 16 bit samples and (0...31) for 32 bit samples, in the parallel
word of the rst data bit. Bits SSPOS up to and including 15 or 31
(MSB) are taken in order from the serial frame data. All other bits
are set to zero.
Note: Refer also to AI_SERIAL[19]
Offset 0x11 1010
Reserved
Offset 0x11 1014
AI_BASE1
31:6
BASE1
R/W
0
Base Address of buffer 1 must be a 64-byte aligned address in local
memory.
If changed it must be set before ACK1.
5:0
Reserved
Offset 0x11 1018
AI_BASE2
31:6
BASE2
R/W
0
Base Address of buffer 1 must be a 64-byte aligned address in local
memory.
If changed it must be set before ACK2.
5:0
Reserved
Offset 0x11 101C
AI_SIZE
31:6
SIZE
R/W
0
Sets number of samples in buffers before switching to other buffers.
In stereo modes, a pair of 16-bit or 32-bit data counts as 1 sample.
In mono modes, a single value counts as a sample.Buffer size in
bytes is as follows:
16 bps, mono: 2 * SIZE
32 bps, mono: 4 * SIZE
16 bps, stereo: 4 * SIZE
32 bps, stereo: 8 * SIZE
During raw mode the sample size is always 8 bits. Hence Buffer size
in bytes for the raw mode is SIZE.
5:0
Reserved
Offset 0x11 1020—1FF0 Reserved
Offset 0x11 1FF4
AI_PWR_DWN
31:1
Unused
-
Table 11: Audio (I2S) Input Ports Registers …Continued
Bit
Symbol
Acces
s
Value
Description