Chapter 8 Timer Module (TIM16B8CV3) Block Description
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
309
8.3.2.11
Timer System Control Register 2 (TSCR2)
Read: Anytime
Write: Anytime.
Module Base + 0x000D
7
6
5
4
3
2
1
0
R
TOI
0
0
0
TCRE
PR2
PR1
PR0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 8-19. Timer System Control Register 2 (TSCR2)
Table 8-14. TSCR2 Field Descriptions
Field
Description
7
TOI
Timer Overflow Interrupt Enable
0 Interrupt inhibited.
1 Hardware interrupt requested when TOF flag set.
3
TCRE
Timer Counter Reset Enable
— This bit allows the timer counter to be reset by a successful output compare 7
event. This mode of operation is similar to an up-counting modulus counter.
0 Counter reset inhibited and counter free runs.
1 Counter reset by a successful output compare 7.
Note:
If TC7 = 0x0000 and TCRE = 1, TCNT will stay at 0x0000 continuously. If TC7 = 0xFFFF and TCRE = 1,
TOF will never be set when TCNT is reset from 0xFFFF to 0x0000.
Note:
TCRE=1 and TC7!=0, the TCNT cycle period will be TC7 x "prescaler counter width" + "1 Bus Clock", for
a more detail explanation please refer to
Section 8.4.3, “Output Compare
Note:
This bit and feature is available only when channel 7 exists. If channel 7 doesn’t exist, this bit is reserved.
Writing to reserved bit has no effect. Read from reserved bit return a zero.
2:0
PR[2:0]
Timer Prescaler Select
— These three bits select the frequency of the timer prescaler clock derived from the
.
Table 8-15. Timer Clock Selection
PR2
PR1
PR0
Timer Clock
0
0
0
Bus Clock / 1
0
0
1
Bus Clock / 2
0
1
0
Bus Clock / 4
0
1
1
Bus Clock / 8
1
0
0
Bus Clock / 16
1
0
1
Bus Clock / 32
1
1
0
Bus Clock / 64
1
1
1
Bus Clock / 128
Содержание MC9S12ZVHL32
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Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
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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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