ATMEGA128RFA1_11 Datasheet, PDF (417/560 Pages) ATMEL Corporation – 8-bit Microcontroller with Low Power 2.4GHz Transceiver for ZigBee and IEEE 802.15.4

ATmega128RFA1
Channel
Differential
ADPS
3
4…7
0…7
Delay from Conversion Start Request to Sample &
Hold tSCSMP
0 CPU clock cycles
0 CPU clock cycles
2 ADC clock cycles
Table 27-4. Tracking Time
Channel
Tracking Phase Duration tTRCK in ADC Clock Cycles
Single-Ended
ADTHT+1, minimum 500 ns
Differential
2ADTHT+3
Table 27-5. Sample Rate in Free Running Mode
Channel
Sample Rate in ADC Clock Cycles
Single-Ended
ADTHT+12
Differential
2ADTHT+14
Figure 27-6. ADC Timing Diagram, Single Conversion
C onversion
T racking
A D C C lock
ADEN
ADSC
A D IF
ADCH
ADCL
tSC SM P
M U X and R EFS U pdate
11 TADC_CLK
Prescaler Reset
and
Sam ple & H old
C onversion
Com plete
Sign and M S B of R esult
LS B of R esult
tTR C K
M UX and R EFS U pdate
C onversion
tSC SM P
P rescaler
R eset
and
S am ple
& Hold
Figure 27-7. ADC Timing Diagram, Auto Triggered Conversion
C onversion
T ra c k in g
AD C Clock
ADEN
Trigger Source
ADATE
A D IF
ADCH
ADCL
tSC SM P
M U X and R E FS U pdate
11 TADC_CLK
Prescaler R eset
and
Sam ple & Hold
C onversion
Com plete
Sign and M SB of R esult
LSB of Result
tTRC K
M UX and REFS Update
C onversion
tSC SM P
P re s ca le r
R eset
and
Sam ple
& Hold
8266C-MCU Wireless-08/11
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