NSAM265SR Datasheet, PDF (18/58 Pages) National Semiconductor (TI) – CompactSPEECH Digital Speech Processors

2 0 Functional Description (Continued)
FIGURE 2-9 Four AMD Flash Devices External Logic One Decoder
TL EE 12378 – 12
2 11 IVS ACCESS
IVS vocabularies reside on either ROM or FLASH
(NSAM265SF only) The IVS tool is used to compile a vo-
cabulary definition into a binary file that should be burnt into
the memory device If more than one vocabulary is used the
binary files are concatenated to form a single ‘‘ready-to-
burn’’ binary file
For more details about the IVS tool and how to program
IVS vocabularies on ROM and FLASH See the IVS User’s
Manual
2 12 CLOCKING
The CompactSPEECH provides an internal oscillator that
interacts with an external clock source through the X1 PLI
and X2 CLKIN pins Either an external single-phase clock
signal or a crystal may be used as the clock source
Single-Phase Clock Signal
If an external single-phase clock source is used it should be
connected to the CLKIN signal as shown in Figure 2-10 and
should conform with the voltage level requirements for
CLKIN stated in ELECTRICAL CHARACTERISTICS
TL EE 12378 – 13
FIGURE 2-10 External Clock Source
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