Analog Devices Blackfin Audio EZ-Extender, Руководство пользователя

Страница: 27 / 44

Blackfin EZ-Extender Manual 2-7
EZ-Extender Hardware Reference
General Frame Sync Routing Switch (SW3)
Frame synchronization signals
FSYNC1
and
FSYNC2
get configured through
the
SW3
DIP switch settings, as illustrated in Figure 2-1 on page 2-2 .
The
FSYNC1
signal can be set by either the
PF2
programmable flag or the
processor’s
PPI0_SYNC1
signal. The
FSYNC2
signal can be set by either the
PF3
programmable flag or the
PPI0_SYNC2
signal. Table 2-6 and Table 2-7
depict the available options. Note that the source of the
PPI0_SYNC1
and
PPI0_SYNC2
signals is dependent on the EZ-KIT Lite to which you
connect.

If the
PF2
or
PF3
programmable flags are used, ensure the flags are
not used for other purposes on the EZ-KIT Lite board (the mother
board).
Table 2-6. FSYNC1 Source Settings
SW3 Position 1
RX_CLK SW3 Position 2
TX_CLK FSYNC1 Source
OFF OFF FSYNC1
signal is used
OFF ON FSYNC1
signal is not used
ON OFF FSYNC1
=
PF2
– – All others, do not use
Table 2-7. FSYNC2 Source Settings
SW3 Position 3
RX_CLK SW3 Position 4
TX_CLK FSYNC2 Source
OFF OFF FSYNC2
signal is used
OFF ON FSYNC2
signal is not used
ON OFF FSYNC2
=
PF3
– – All others, do not use