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Description
1-2
1.1
Description
MSP53C391 and MSP53C392 are standard slave synthesizers from Texas
Instruments that accept compressed speech data from another microproces-
sor and produce speech with that data. This allows the MSP53C391 and
MSP53C392 to be used with a master microprocessor in the various speech
products including electronic learning aids, games, and toys.
The TI MSP53C391 and MSP53C392 support several different speech syn-
thesis algorithms to permit tradeoffs to meet the different price performance
requirements of different markets. They also incorporate a two-channel FM
synthesis routine for music generation.
Both the MSP53C391 and MSP53C392 are special programs that run on the
MSP50C3x device. For more information about the MSP50C3x, please refer
to the
MSP50x3x User’s Guide (literature number: SLOU006B)
1.2
Features
Wide ranges of algorithms are incorporated in one chip. This allows the
user to choose from a low bit rate to high-quality synthesizing routines for
their application. Algorithms included are:
LPC 5220, LPC D6
MELP v4.1
CELP v3.4, 4.2 kbps, 4.8 kbps, 6.2 kbps, 8.6 kbps, 10.7 kbps
8-bit PCM
FM II
Software selectable 8-kHz or 10-kHz speech sample rate
Three different interface options to support different pin count require-
ments
32-
Ω
speaker direct drive capability
Internally generated clock requires no external components
Maximum 10-
µ
A standby current in sleep mode
Digital volume control
Built-in, two general-purpose output pins for MSP53C391 pin expansion
Summary of Contents for MSP53C391
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