
Philips Semiconductors
PNX15xx Series
Volume 1 of 1
Chapter 1: Integrated Circuit Data
PNX15XX_SER_3
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 3 — 17 March 2006
1-14
AI_WS
AD21
BPTS3CHP
I/O
16
U AI can operate in either master or slave mode.
When Audio In is programmed as the serial-
interface timing slave (power-up default), AI_WS
acts as an input. AI_WS is sampled on the same
edge as selected for AI_SD[3:0].
When Audio In is programmed as the serial-
interface timing master, AI_WS acts as an
output. It is asserted on the opposite edge of the
AI_SD[3:0] sampling edge.
AI_WS is the word-select or frame-synchronization
signal from/to the external A/D subsystem.
AI_SD3
AI_SD2
AI_SD1
AI_SD0
AD22
AC17
AF24
AE23
BPT3MCHDT5V
IN
20
19
18
17
D
Serial Data from external A/D subsystem. Data on
this pin are sampled on positive or negative edge of
AI_SCK as determined by the CLOCK_EDGE bit in
the AI_SERIAL register. These pins are 5 V tolerant
input.
Octal Audio Out (audio out always acts as sender, but can be set as master or slave for D/A timing)
AO_OSCLK
AD19
BPX2T14MCP
OUT
-
U Over Sampling Clock. This output can be
programmed to emit any frequency up to 50 MHz,
with a sub one Hertz resolution. It is intended to be
used as the 256 or 384 fs over sampling clock by
the external D/A conversion subsystem. A board
level 27-33
series resistor is recommended to
reduce ringing.
AO_SCK
AE18
BPX2T14MCP
I/O
-
U AO can operate in either master or slave mode.
When Audio Out is programmed to act as the
serial interface timing slave (power up default),
AO_SCK acts as input. It receives the Serial
Clock from the external audio D/A subsystem.
The clock is treated as fully asynchronous to the
PNX1500 main clock.
When Audio Out is programmed to act as serial
interface timing master, AO_SCK acts as output.
It drives the Serial Clock for the external audio
D/A subsystem. The clock frequency is a
programmable integral divide of the AO_OSCLK
frequency.
AO_SCK is limited to 25 MHz. The sample rate of
the valid samples is variable. If used as an output, a
board level 27-33
series resistor is
recommended to reduce ringing.
Table 4: PNX1500 Interface
Pin Name
BGA
Ball
Pad
Type
I/O
Type
GPIO
#
P Description