mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 666

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Functional description
In application code, the user reads the temperature sensor channel, calculates V
, and
TEMP
compares to V
. If V
is greater than V
the cold slope value is applied in
TEMP25
TEMP
TEMP25
the preceding equation. If V
is less than V
, the hot slope value is applied in
TEMP
TEMP25
the preceding equation.
For more information on using the temperature sensor, see the application note titled
Temperature Sensor for the HCS08 Microcontroller Family (document AN3031).
29.4.9 MCU wait mode operation
Wait mode is a lower power-consumption standby mode from which recovery is fast
because the clock sources remain active. If a conversion is in progress when the MCU
enters Wait mode, it continues until completion. Conversions can be initiated while the
MCU is in Wait mode by means of the hardware trigger or if continuous conversions are
enabled.
The bus clock, bus clock divided by two, and ADACK are available as conversion clock
sources while in Wait mode. The use of ALTCLK as the conversion clock source in Wait
is dependent on the definition of ALTCLK for this MCU. Refer to the Chip
Configuration information on ALTCLK specific to this MCU.
If the compare and hardware averaging functions are disabled, a conversion complete
event sets the COCO and generates an ADC interrupt to wake the MCU from Wait mode
if the respective ADC interrupt is enabled (AIEN=1). If the hardware averaging function
is enabled, the COCO will set (and generate an interrupt if enabled) when the selected
number of conversions are completed. If the compare function is enabled, the COCO will
set (and generate an interrupt if enabled) only if the compare conditions are met. If a
single conversion is selected and the compare trigger is not met, the ADC will return to
its idle state and cannot wake the MCU from Wait mode unless a new conversion is
initiated by the hardware trigger.
29.4.10 MCU Normal Stop mode operation
Stop mode is a low power-consumption standby mode during which most or all clock
sources on the MCU are disabled.
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Preliminary
666
Freescale Semiconductor, Inc.