Chapter 19 Simple Sound Generator (SSGV1)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
672
Freescale Semiconductor
19.4.4
SSG Start and Stop
To start SSG, user should set SSGE of SSGCR and config all registers, then set the RDR of SSGCR, the
SSG will start to work.
In run time, when the STP of SSGCR is set, the SSG will stop immediately, all counters will be cleared
(reset to 0). When STP of SSGCR is cleared, SSG will restart if RDR is set. Same for the SSGE of SSGCR,
when clear the SSGE, the SSG will stop immediately, all counters will be cleared (reset to 0). when the
SSGE is set, SSG will restart if RDR is set. Clear the SSGE will disable the SGA and SGT output, so it is
not recommend to use SSGE to stop the SSG.
The RDR of SSGCR can also stop the SSG, when reload occurs while the RDR is cleared, SSG will stop
with all counters cleared, and the interrupt flag (RNDI of SSGIF) will be set. When the RDR is set again,
the SSG will restart. Refer to
.
Exponential attack operation:
SSGAMPB = SSGAMP;
do {
SSGAMPB = SSGAMPB << 1 + 1;
} while (SSGAMPB < AT_buf)
Where : AT_buf is the internal buffer of amplitude threshold register SSGAT.
SSGAMPB = SSGAMP;
do {
SSGAMPB = SSGAMPB >> 1;
} while (SSGAMPB > AT_buf)
Where : AT_buf is the internal buffer of amplitude threshold register SSGAT.
Exponential decay operation:
Содержание MC9S12ZVHL32
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Страница 686: ...Chapter 20 ECC Generation module SRAM_ECCV1 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 686 Freescale Semiconductor...
Страница 752: ...Chapter 22 Supply Voltage Sensor BATSV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 752 Freescale Semiconductor...
Страница 774: ...Chapter 23 LIN Physical Layer S12LINPHYV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 774 Freescale Semiconductor...
Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
Страница 794: ...Appendix B ADC Electricals S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 794 Freescale Semiconductor...
Страница 798: ...Appendix D IRC Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 798 Freescale Semiconductor...
Страница 802: ...Appendix F MSCAN Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 802 Freescale Semiconductor...
Страница 806: ...Appendix G NVM Electrical Parameters S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 806 Freescale Semiconductor...
Страница 810: ...Appendix H BATS Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 810 Freescale Semiconductor...
Страница 816: ...Appendix K OSC32K Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 816 Freescale Semiconductor...
Страница 822: ...Appendix L SPI Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 822 Freescale Semiconductor...
Страница 826: ...Appendix M LINPHY Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 826 Freescale Semiconductor...
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