MC908QL4ME View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MC908QL4ME

M68HC08 Microcontrollers

Freescale Semiconductor 

Analog-to-Digital Converter (ADC10) Module

ADLSMP — Long Sample Time Configuration

This bit configures the sample time of the ADC10 to either 3.5 or 23.5 ADCK clock cycles. This adjusts

the sample period to allow higher impedance inputs to be accurately sampled or to maximize

conversion speed for lower impedance inputs. Longer sample times can also be used to lower overall

power consumption in continuous conversion mode if high conversion rates are not required.

1 = Long sample time (23.5 cycles)

0 = Short sample time (3.5 cycles)

ACLKEN — Asynchronous Clock Source Enable

This bit enables the asynchronous clock source as the input clock to generate the internal clock ADCK,

and allows operation in stop mode. The asynchronous clock source will operate between 1 MHz and

2 MHz if ADLPC is clear, and between 0.5 MHz and 1 MHz if ADLPC is set.

1 = The asynchronous clock is selected as the input clock source (the clock generator is only

enabled during the conversion)

0 = ADICLK specifies the input clock source and conversions will not continue in stop mode

MC68HC908QL4 Data Sheet, Rev. 7

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Freescale Semiconductor

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