Serial Audio Interface Signals
2-8
MCF5249UM
MOTOROLA
Table 2-6 Serial Audio Interface Signals
SERIAL MODULE SIGNAL
DESCRIPTION
Serial Audio Bit Clock
The SCLK1, SCLK2/GPIO48, SCLK3/GPIO49, AND
SCLK4/GPIO50 multiplexed pins can serve as general purpose
I/Os or serial audio bit clocks. As bit clocks, these bidirectional
pins can be programmed as outputs to drive their associated
serial audio (IIS) bit clocks. Alternately, these pins can be
programmed as inputs when the serial audio bit clocks are
driven internally. The functionality is programmed within the
Audio module. During reset, these pins are configured as input
serial audio bit clocks.
Serial Audio Word Clock
The LRCK1, LRCK2/GPIO44, LRCK3/GPIO45, AND
LRCK4/GPIO46 multiplexed pins can serve as general
purpose I/Os or serial audio word clocks. As word clocks, the
bidirectional pins can be programmed as inputs to drive their
associated serial audio word clock. Alternately, these pins can
be programmed as outputs when the serial audio word clocks
are derived internally. The functionality is programmed within
input serial audio word clocks.
Serial Audio Data In
The SDATAI1, SDATAI3/GPI41, SDATAI4/GPI42 multiplexed
pins can serve as general purpose I/Os or serial audio inputs.
As serial audio inputs the data is sent to interfaces 1,3 and 4
respectively. The functionality of these pins is programmed
with the GPIO-FUNCTION and GPIO1-FUNCTION registers.
During reset, the pins are configured as serial data inputs.
Serial Audio Data Out
The SDATAO1/GPIO25 AND SDATAO2/GPI41 multiplexed
pins can serve as general purpose I/Os or serial audio outputs.
The functionality of these pins is programmed with registers
GPIO-FUNCTION and GPIO1-FUNCTION. During reset, the
pins are configured as serial data outputs.
Serial audio error flag
The EF/GPIO19 multiplexed pin can serve as general purpose
I/Os or error flag input. As error flag input, this pin will input the
error flag delivered by the CD-DSP. EF/GPIO19 is only
relevant for serial interface in 1
Serial audio CFLG
The CFLG/GPIO18 multiplexed pin can serve as general
purpose I/O or CFLG input. As CFLG input, the pin will input
the CFLG flag delivered by the CD-DSP. CFLG/GPIO18 is only
relevant for serial interface in 1.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.