TWR-56F8257 Freescale Semiconductor, TWR-56F8257 Datasheet - Page 45

• Manufacturer Part Number: TWR-56F8257
• Description: TOWER SYSTEM KIT MC56F8257
• Manufacturer: Freescale Semiconductor
• Type: DSC, Digital Signal Controllerr

Specifications of TWR-56F8257

• Contents: Board, Cables, Documentation, DVD
• For Use With/related Products: Freescale Tower System, MC56F8257
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.7.3
In addition to how PWM0_EXTA, PWM1_EXTA, PWM2_EXTA, and PWM3_EXTA connect to crossbar outputs, the ADC
conversion high/low limit compare results of sample0, sample1, and sample2 are used to drive PWM0_EXTB, PWM1_EXTB,
and PWM2_EXTB, respectively. PWM3_EXTB is permanently tied to GND.
State of PWM0_EXTB:
State of PWM1_EXTB:
Freescale Semiconductor
XBAR_OUT7
XBAR_OUT8
XBAR_OUT9
XBAR_OUT10
XBAR_OUT11
XBAR_OUT12
XBAR_OUT13
XBAR_OUT14
XBAR_OUT15
XBAR_OUT16
XBAR_OUT17
XBAR_OUT18
XBAR_OUT19
XBAR_OUT20
XBAR_OUT21
XBAR_OUT22
XBAR_OUT23
XBAR_OUT24
XBAR_OUT25
XBAR_OUT26
XBAR_OUT27
XBAR_OUT28
XBAR_OUT29
XBAR_OUTn
•
•
•
If the ADC conversion result in SAMPLE0 is greater than the value programmed into the high limit register 0,
PWM0_EXTB is driven low.
If the ADC conversion result in SAMPLE0 is less than the value programmed into the low limit register 0,
PWM0_EXTB is driven high.
If the ADC conversion result in SAMPLE1 is greater than the value programmed into the high limit register 1,
PWM1_EXTB is driven low.
Interconnection of PWM Module and ADC Module
ADCB
DAC
CMPA
CMPB
CMPC
PWM0 EXTA
PWM1 EXTA
PWM2 EXTA
PWM3 EXTA
PWM0 EXT_SYNC
PWM1 EXT_SYNC
PWM2 EXT_SYNC
PWM3 EXT_SYNC
PWM EXT_CLK
PWM FAULT0
PWM FAULT1
PWM FAULT2
PWM FAULT3
PWM FORCE
TB0
TB1
TB2
TB3
Table 16. Crossbar Output Signal Assignments (continued)
Output to
MC56F825x/MC56F824x Digital Signal Controller, Rev. 3
eFlexPWM submodule 0 Alternate Control signal
eFlexPWM submodule 1 Alternate Control signal
eFlexPWM submodule 2 Alternate Control signal
eFlexPWM submodule 3 Alternate Control signal
eFlexPWM submodule 0 External Synchronization signal
eFlexPWM submodule 1 External Synchronization signal
eFlexPWM submodule 2 External Synchronization signal
eFlexPWM submodule 3 External Synchronization signal
Quad Timer B0 Input when SIM_GPS3[12] is set
Quad Timer B1 Input when SIM_GPS3[13] is set
Quad Timer B2 Input when SIM_GPS3[14] is set
Quad Timer B3 Input when SIM_GPS3[15] is set
ADCB Trigger
12-bit DAC SYNC_IN
Comparator A Window/Sample
Comparator B Window/Sample
Comparator C Window/Sample
eFlexPWM External Clock signal
eFlexPWM Module FAULT0
eFlexPWM Module FAULT1
eFlexPWM Module FAULT2
eFlexPWM Module FAULT3
eFlexPWM External Output Force signal
Function
General System Control Information
45