Datasheet

Configuration Switches
2-14 SHARC Audio EZ-Extender Manual
Audio In8 Right Selection Switch (SW18)
The audio selection switch (SW18) connects the right channel of the In8
line, connected to the AD1939’s ADC12 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. The switch circuit
is connected to AD1939C (codec C). To use the standard, off the shelf
DB25 connector to XLR cables, change the switch to the differential set-
ting; see Table 2-12. See also“Differential In/Out Connectors (P1–5)” on
page 2-18.
Memory Configuration Switch (SW19)
The memory configuration switch (SW19) settings are shown in
Table 2-13. For more information on the memory functionality, refer to
the memory manufacturer’s datasheet. By default, the memory write pro-
tection is on and as a result, the device select and address bytes are
acknowledged, but the data bytes are not. In order to write to the memory
device, turn the DIP switch (SW19.1) OFF.
Table 2-12. Audio In8 Right Selection Switch (SW18)
SW18 Position Single-Ended Mode
RCA IN (Default)
Differential Mode
DB25 IN (P2)
SW18.1 ON OFF
SW18.2 OFF ON
SW18.3 ON OFF
SW18.4 OFF ON
SW18.5 ON OFF
SW18.6 OFF ON