The CHnF bit is set and channel (n) interrupt is generated (if CHnIE = 1) at the channel
(n) match (TPM counter = CnV) when the TPM counting is down (at the begin of the
pulse width) and when the TPM counting is up (at the end of the pulse width).
This type of PWM signal is called center-aligned because the pulse width centers for all
channels are when the TPM counter is zero.
The other channel modes are not designed to be used with the up-down counter (CPWMS
= 1). Therefore, all TPM channels should be used in CPWM mode when (CPWMS = 1).
pulse width
counter overflow
timer module counter =
MOD
period
(2 x CnV)
(2 x MOD)
timer module counter = 0
channel (n) match
(timer module counting
is down)
channel (n) match
(timer module counting
is up)
counter overflow
timer module counter =
MOD
channel (n) output
Figure 27-12. CPWM period and pulse width with ELSnB:ELSnA = 1:0
If (ELSnB:ELSnA = 0:0) when the TPM counter reaches the value in the CnV register,
the CHnF bit is set and the channel (n) interrupt is generated (if CHnIE = 1), however the
channel (n) output is not controlled by TPM.
If (ELSnB:ELSnA = 1:0), then the channel (n) output is forced high at the channel (n)
match (TPM counter = CnV) when counting down, and it is forced low at the channel (n)
match when counting up (see the following figure).
TOF bit
...
7
8
8
7
7
7
6
6
6
5
5
5
4
4
3
3
2
2
1
0
1
...
previous value
CNT
channel (n) output
counter
overflow
channel (n) match in
down counting
channel (n) match in
up counting
channel (n) match in
down counting
counter
overflow
CHnF bit
MOD = 0x0008
CnV = 0x0005
Figure 27-13. CPWM signal with ELSnB:ELSnA = 1:0
If (ELSnB:ELSnA = X:1), then the channel (n) output is forced low at the channel (n)
match (TPM counter = CnV) when counting down, and it is forced high at the channel (n)
match when counting up (see the following figure).
Functional description
MKW01Z128 MCU Reference Manual, Rev. 3, 04/2016
536
Freescale Semiconductor, Inc.
Содержание MKW01Z128
Страница 7: ...MKW01xxRM Reference Manual Rev 3 04 2016 viii Freescale Semiconductor Inc...
Страница 11: ...MKW01xxRM Reference Manual Rev 3 04 2016 xii Freescale Semiconductor Inc...
Страница 31: ...MKW01Z128 Pins and Connections MKW01xxRM Reference Manual Rev 3 04 2016 2 8 Freescale Semiconductor Inc...
Страница 129: ...MKW01Z128 Transceiver MCU SPI Interface MKW01xxRM Reference Manual Rev 3 04 2016 8 6 Freescale Semiconductor Inc...
Страница 130: ...MKW01xxRM Reference Manual Rev 3 04 2016 Freescale Semiconductor Inc A 1 Appendix A MKW01Z128 MCU Reference Manual...
Страница 131: ...MKW01Z128 MCU Reference Manual MKW01xxRM Reference Manual Rev 3 04 2016 A 2 Freescale Semiconductor Inc...
Страница 133: ...MKW01Z128 MCU Reference Manual Rev 3 04 2016 2 Freescale Semiconductor Inc...
Страница 221: ...Private Peripheral Bus PPB memory map MKW01Z128 MCU Reference Manual Rev 3 04 2016 90 Freescale Semiconductor Inc...
Страница 233: ...Module clocks MKW01Z128 MCU Reference Manual Rev 3 04 2016 102 Freescale Semiconductor Inc...
Страница 255: ...Module operation in low power modes MKW01Z128 MCU Reference Manual Rev 3 04 2016 124 Freescale Semiconductor Inc...
Страница 279: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 148 Freescale Semiconductor Inc...
Страница 305: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 174 Freescale Semiconductor Inc...
Страница 325: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 194 Freescale Semiconductor Inc...
Страница 379: ...Application information MKW01Z128 MCU Reference Manual Rev 3 04 2016 248 Freescale Semiconductor Inc...
Страница 387: ...Memory map register descriptions MKW01Z128 MCU Reference Manual Rev 3 04 2016 256 Freescale Semiconductor Inc...
Страница 465: ...Functional Description MKW01Z128 MCU Reference Manual Rev 3 04 2016 334 Freescale Semiconductor Inc...
Страница 501: ...Initialization Application information MKW01Z128 MCU Reference Manual Rev 3 04 2016 370 Freescale Semiconductor Inc...
Страница 513: ...Interrupts MKW01Z128 MCU Reference Manual Rev 3 04 2016 382 Freescale Semiconductor Inc...
Страница 517: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 386 Freescale Semiconductor Inc...
Страница 611: ...Application information MKW01Z128 MCU Reference Manual Rev 3 04 2016 480 Freescale Semiconductor Inc...
Страница 633: ...CMP Trigger Mode MKW01Z128 MCU Reference Manual Rev 3 04 2016 502 Freescale Semiconductor Inc...
Страница 643: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 512 Freescale Semiconductor Inc...
Страница 671: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 540 Freescale Semiconductor Inc...
Страница 803: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 672 Freescale Semiconductor Inc...
Страница 843: ...Functional description MKW01Z128 MCU Reference Manual Rev 3 04 2016 712 Freescale Semiconductor Inc...
Страница 877: ...Initialization application information MKW01Z128 MCU Reference Manual Rev 3 04 2016 746 Freescale Semiconductor Inc...