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Chapter 2 NI SPEEDY-33 Functional Description and Interface
© National Instruments Corporation 2-9 NI SPEEDY-33 User Manual
The digital I/O signals are 3.3 V, but the inputs are 5 V tolerant. Although
not required, pin 20 (ResetLow) can be driven low to reset the DSP; it is
pulled high by the NI SPEEDY-33.
Standard Expansion Analog I/O Connectors
A set of two connectors, J4 and J6, make up the standard expansion analog
I/O connectors, that can be used for optional daughter modules. The
daughter modules can be used for applications requiring different A/D
and/or D/A functionality than that provided by the standard 16-bit stereo
CODEC normally found on the NI SPEEDY-33.
Refer to the Connecting Accessories to the NI SPEEDY-33 section for
information on NI and third-party daughter modules for use with the
NI SPEEDY-33.
Connecting Accessories to the NI SPEEDY-33
Refer to Figure 2-1 to connect accessories to the NI SPEEDY-33 as
described in Table 2-1.
Caution Do not connect the power source to the power port while the NI SPEEDY-33
device is connected to the PC.
Table 2-1. NI SPEEDY-33 Accessories
Accessory NI SPEEDY-33 Port
Microphone, CD player, MP3 player, PDA, cell phone,
or any peripheral with mini jack connector output
Audio stereo input port
Audio speakers (included with Infinity Technology Kit)
or any audio speakers or headphones with mini jack connector input
Audio stereo output port
Any 9 VDC at 500 mA power port with appropriate safety and EMC
Certification marks, which are acceptable in the country in which the
product is to be installed
Power port