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