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VR Stamp™ Module - Serial EEPROM
Data Sheet
2
P/N 80-0274-E
© 2006 Sensory Inc.
DC Specifications
For details, refer to RSC-4128 Data Sheet (80-0206).
Major Components
U3 RSC-4128 IC
The RSC-4128 Integrated Circuit is the central speech processor.
Y1 Crystal
A 3.57 MHz crystal drives a 14.3MHz phase lock loop (PLL) in the RSC-4128 to create the system clock. Timer
1 is used for all speech recognition functions, and should only be used by the application programmer who is not
using speech recognition. Timer 3 is reserved for the application programmer.
Y2 Crystal
A 32.768 KHz crystal establishes the frequency of Timer 2 on the RSC-4128 IC. Timer 2 is useful for
timekeeping applications since it is not interrupted, unlike Timer 1.
R4 Microphone Source (gain) Resistor
A 1.2K on-board through-hole microphone source resistor is calibrated for use with a microphone with -44dB
sensitivity with 2.2K. This satisfies the -49dB system gain.
U2 1M Bit Flash Memory
This 1Mb Flash memory stores the application binary code.
U4 128K Bit Serial EEPROM Memory
This 128K bit serial EEPROM is designed to store speech templates and application data.
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