Command Sequences
4-7
MSP53C391 AND MSP53C392 Software Description
4.5.6
Generate Test Signal
The MSP53C391 has three test modes.
Generate 4-kHz signal on OUT1
Generate 5-kHz signal on OUT2
Echo input data
The MSP53C392 has two test modes. Echo input data is not available on
the MSP53C392.
Generate 4-kHz signal on DATA2
Generate 5-kHz signal on DATA3
Sending a command code of 0xE65D to the MSP53C391 generates a 5-kHz
signal on the OUT2 pin. This can be used to test the accuracy of the internal
oscillator when it is programmed to 19.2 MHz. The only way to exit this test
mode is to pulse the INIT pin low.
Sending a command code of 0xE65C to the MSP53C391 generates a 4-kHz
signal on the OUT1 pin. This can be used to test the accuracy of the internal
oscillator when it is programmed to 15.36 MHz. The only way to exit this test
mode is to pulse the INIT pin low.
Sending a command code of 0xE65D to the MSP53C392 generates a 5-kHz
signal on the DATA3 pin. Once the command code has been transmitted to the
MSP53C392, the STROB must be set low and the R/W must be set high to
enable the generation of the 5-kHz signal. This can be used to test the accura-
cy of the internal oscillator when it is programmed to 19.2 MHz. The only way
to exit this test mode is to pulse the INIT pin low.
Sending a command code of 0xE65C to the MSP53C392 generates a 4-kHz
signal on the DATA2 pin. Once the command code has been transmitted to the
MSP53C392, the STROB must be set low and the R/W must be set high to
enable the generation of the 4-kHz signal. This can be used to test the accura-
cy of the internal oscillator when it is programmed to 15.36 MHz. The only way
to exit this test mode is to pulse the INIT pin low.
Sending a command code of 0xE96D to the MSP53C391 causes it to enter a
special test mode in which the input data latched into the device is echoed out
to the OUT2, OUT1, EOS, and IRQ pins. This mode is for debugging the com-
munications interface between the master microprocessor and the
MSP53C391. While in this mode, the MSP53C391 will not speak the voice
data. The only way to exit this mode is to pulse the INIT pin low. This mode is
not available on the MSP53C392.
Summary of Contents for MSP53C391
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Page 62: ...C 1 Appendix A Listing of FMequM2 inc Topic Page C 1 Listing of FMequM2 inc C 2 Appendix C ...
Page 78: ...E 1 Appendix A Listing of FM2INTR1 inc Topic Page E 1 Listing of FM2INTR1 inc E 2 Appendix E ...
Page 99: ...MSP53C31 and MSP53C32 Data Sheet F 2 F 1 MSP53C31 and MSP53C32 Data Sheet ...