S912XEG384J3VA Datasheet, PDF (86/1324 Pages) Freescale Semiconductor, Inc – MC9S12XEP100 Reference Manual Covers MC9S12XE Family

Chapter 1 Device Overview MC9S12XE-Family
1.7 ADC0 Configuration
1.7.1 External Trigger Input Connection
The ADC module includes four external trigger inputs ETRIG0, ETRIG1, ETRIG2, and ETRIG3. The
external trigger allows the user to synchronize ADC conversion to external trigger events. Table 1-17
shows the connection of the external trigger inputs.
Table 1-17. ATD0 External Trigger Sources
External Trigger
Input
ETRIG0
ETRIG1
ETRIG2
ETRIG3
Connectivity
Pulse width modulator channel 1
Pulse width modulator channel 3
Periodic interrupt timer hardware trigger 0
Periodic interrupt timer hardware trigger 1
Consult the ATD block description for information about the analog-to-digital converter module. ATD
block description refererences to freeze mode are equivalent to active BDM mode.
1.7.2 ADC0 Channel[17] Connection
Further to the 16 externally available channels, ADC0 features an extra channel[17] that is connected to
the internal temperature sensor at device level. To access this channel ADC0 must use the channel
encoding SC:CD:CC:CB:CA = 1:0:0:0:1 in ATDCTL5. For more temperature sensor information, please
refer to 1.10.1 Temperature Sensor Configuration
1.8 ADC1 External Trigger Input Connection
The ADC module includes four external trigger inputs ETRIG0, ETRIG1, ETRIG2, and ETRIG3. The
external trigger feature allows the user to synchronize ADC conversion to external trigger events. Table 1-
18 shows the connection of the external trigger inputs.
Table 1-18. ATD1 External Trigger Sources
External Trigger
Input
ETRIG0
ETRIG1
ETRIG2
ETRIG3
Connectivity
Pulse width modulator channel 1
Pulse width modulator channel 3
Periodic interrupt timer hardware trigger 0
Periodic interrupt timer hardware trigger 1
Consult the ADC block description for information about the analog-to-digital converter module. ADC
block description refererences to freeze mode are equivalent to active BDM mode.
MC9S12XE-Family Reference Manual Rev. 1.25
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Freescale Semiconductor