
Data Sheet
June 2001
DSP16410B Digital Signal Processor
Agere Systems Inc.
Agere Systems—Proprietary
Use pursuant to Company instructions
261
8 Signal Descriptions
(continued)
8.4 SIU0 Interface
(continued)
SCK0—External Clock Source:
Input. The SCK0 pin
is an input that provides an external clock source for
generating the input and output bit clocks and frame
syncs. If enabled via the AGEXT field (
SCON12
[12]—
Table 113 on page 192
), the clock source applied to
SCK0 replaces the internal clock (CLK) for active mode
timing generation of the bit clocks and frame
syncs. The active level of the clock applied to this pin
can be inverted by setting the SCKK field
(
SCON12
[13]).
8.5 SIU1 Interface
SID1—External Serial Input Data:
Input. By default,
data is latched on the SID1 pin on a falling edge of the
input bit clock, SICK1, during a selected channel.
SOD1—External Serial Output Data:
Output. By
default, data is driven onto the SOD1 pin on a rising
edge of the output bit clock, SOCK1, during a selected
and unmasked channel. During inactive or masked
channel periods, SOD1 is 3-state.
SICK1—Input Bit Clock:
Input/output. SICK1 can be
an input (passive input clock) or an output (active input
clock). The SICK1 pin is the input data bit clock. By
default, data on SID1 is latched on a falling edge of this
clock, but the active level of this clock can be changed
by the ICKK field (
SCON10
[3]—
Table 111 on
page 188
). SICK1 can be configured via software as
an input (passive, externally generated) or an output
(active, internally generated) via the ICKA field
(
SCON10
[2]) and the ICKE field
(
SCON3
[6]—
Table 104 on page 185
).
SOCK1—Output Bit Clock:
Input/output. SOCK1 can
be an input (passive output clock) or an output (active
output clock). The SOCK1 pin is the output data bit
clock. By default, data on SOD1 is driven on a rising
edge of SOCK1 during active channel periods, but the
active level of this clock can be changed by the OCKK
field (
SCON10
[7]). SOCK1 can be configured via soft-
ware as an input (passive, externally generated) or an
output (active, internally generated) via the OCKA field
(
SCON10
[6]) and the OCKE field (
SCON3
[14]).
SIFS1—Input Frame Synchronization
: Input/output.
The SIFS1 signal indicates the beginning of a new
input frame. By default, SIFS1 is active-high, and a
low-to-high transition (rising edge) indicates the start of
a new frame. The active level and position of the input
frame sync relative to the first input data bit can be
changed via the IFSK field (
SCON10
[1]) and the IFS-
DLY[1:0] field (
SCON1
[9:8]), respectively. SIFS1 can
be configured via software as an input (passive, exter-
nally generated) or an output (active, internally gener-
ated) via the IFSA field (
SCON10
[0]) and the IFSE
(
SCON3
[7]).
SOFS1—Output Frame Synchronization:
Input/out-
put. The SOFS1 signal indicates the beginning of a
new output frame. By default, SOFS1 is active-high,
and a low-to-high transition (rising edge) indicates the
start of a new frame. The active level and position of
the output frame sync relative to the first output data bit
can be changed via the OFSK field (
SCON10
[5]) and
the OFSDLY[1:0] field (
SCON2
[9:8]—
Table 103 on
page 184
), respectively. SOFS1 can be configured via
software as an input (passive, externally generated) or
an output (active, internally generated) via the OFSA
field (
SCON10
[4]) and the OFSE field (
SCON3
[15]).
SCK1—External Clock Source:
Input. The SCK1 pin
is an input that provides an external clock source for
generating the input and output bit clocks and frame
syncs. If enabled via the AGEXT field of
SCON12
[12]—
Table 113 on page 192
), the clock
source applied to SCK1 replaces the internal clock
(CLK) for active mode timing generation of the bit
clocks and frame syncs. The active level of the clock
applied to this pin can be inverted by setting the SCKK
field (
SCON12
[13]).