Datasheet

Push Buttons and Switches
2-16 ADSP-21489 EZ-Board Evaluation System Manual
Audio In2 Left Selection Switch (SW18)
The audio selection switch (SW18) connects the left channel of the In2 line,
connected to the AD1939’s ADC3 circuit, to either the single-ended RCA
connectors or the differential DB25 connector. By default, the switch is
set up to use the RCA connectors for audio in. To use the standard, off
the shelf DB25 connector to XLR cables, change the switch to the differ-
ential setting. See Table 2-15. For more information, see “Differential
In/Out Connectors (P8–9)” on page 2-28.
JTAG Switches (SW19–22)
The JTAG switches (SW19, SW20, SW21, and SW22) select between a sin-
gle-processor (one EZ-Board) and multi-processor (more than one
EZ-Board) configurations. By default, the four DIP switches are set up for
a single EZ-Board configuration. See Table 2-16.
SW17.5 ON OFF
SW17.6 OFF ON
Table 2-15. Audio In2 Left Selection Switch (SW18)
SW18 Position Single Ended RCA IN (Default) Differential DB25 IN (P8)
SW18.1 ON OFF
SW18.2 OFF ON
SW18.3 ON OFF
SW18.4 OFF ON
SW18.5 ON OFF
SW18.6 OFF ON
Table 2-14. Audio In2 Right Selection Switch (SW17) (Cont’d)
SW17 Position Single Ended Use RCA IN (Default) Differential DB25 IN (P8)