Chapter 17 Stepper Stall Detector (SSDV2) Block Description
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
629
NOTE
A change in the accumulator sample frequency will not be effective until the
ITG bit is cleared.
17.3.2.4
Stepper Stall Detector Flag Register (SSDFLG)
Read: anytime
Write: anytime.
5
SSDWAI
SSD Disabled during Wait Mode
— When entering Wait Mode, this bit provides on/off control over the SSD
allowing reduced MCU power consumption. Because the analog circuit is turned off when powered down, the
sigma-delta converter requires a recovery time after exit from Wait Mode.
0 SSD continues to run in WAIT mode.
1 Entering WAIT mode freezes the clock to the prescaler divider, powers down the sigma-delta converter, and
if RTZE bit is set, the sine and cosine coils are recirculated via VSSM.
4
FTST
Factory Test
— This bit is reserved for factory test and reads zero in user mode.
1:0
ACLKS
Accumulator Sample Frequency Select
— This field sets the accumulator sample frequency by pre-scaling
the bus frequency by a factor of 8, 16, 32, or 64. A faster sample frequency can provide more accurate results
but cause the accumulator to overflow. Best results are achieved with a frequency between 500 kHz and 2 MHz.
Accumulator Sample Frequency = f
BUS
/ (8 x 2
ACLKS
)
Table 17-10. Accumulator Sample Frequency
ACLKS
Frequency
f
BUS
= 40
MHz
f
BUS
= 25
MHz
f
BUS
= 16
MHz
0
f
BUS
/ 8
5.00 MHz
3.12 MHz
2.00 MHz
1
f
BUS
/ 16
2.50 MHz
1.56 MHz
1.00 MHz
2
f
BUS
/ 32
1.25 MHz
781 kHz
500 kHz
3
f
BUS
/ 64
625 kHz
391 kHz
250 kHz
Module Base + 0x0003
7
6
5
4
3
2
1
0
R
MCZIF
0
0
0
0
0
0
AOVIF
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 17-5. Stepper Stall Detector Flag Register (SSDFLG)
Table 17-9. SSDCTL Field Descriptions (continued)
Field
Description
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...
Страница 829: ...Appendix O Package Information S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 830 Freescale Semiconductor O 1 144 LQFP...
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