ATA6616-P3QW Atmel, ATA6616-P3QW Datasheet - Page 229

• Manufacturer Part Number: ATA6616-P3QW
• Description: TXRX MULTICHIP MOD LIN SIP 38QFN
• Manufacturer: Atmel
• Series: AVR® ATA66 LIN-SBCr

Specifications of ATA6616-P3QW

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 38-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.18.12
4.18.12.1
9132D–AUTO–12/10
Register Description
ADMUX – ADC Multiplexer Selection Register
• Bit 7:6 – REFS1:REFS0: Voltage Reference Selection Bits
These bits and AREFEN bit from the Analog Miscellaneous Control Register (AMISCR) select
the voltage reference for the ADC, as shown in
conversion, the change will not go in effect until this conversion is complete (ADIF in ADCSRA
register is set). Whenever these bits are changed, the next conversion will take 25 ADC clock
cycles. If active channels are used, using AVCC or an external AREF higher than (AVcc - 1V)
is not recommended, as this will affect ADC accuracy. The internal voltage reference options
may not be used if an external voltage is being applied to the AREF pin.
Table 4-58.
• Bit 5 – ADLAR: ADC Left Adjust Result
The ADLAR bit affects the presentation of the ADC conversion result in the ADC Data Regis-
ter. Write one to ADLAR to left adjust the result. Otherwise, the result is right adjusted.
Changing the ADLAR bit will affect the ADC Data Register immediately, regardless of any
ongoing conversions. For a complete description of this bit, see
Data Register” on page
• Bits 4:0 – MUX4:0: Analog Channel and Gain Selection Bits
These bits select which combination of analog inputs are connected to the ADC. In case of dif-
ferential input, gain selection is also made with these bits. Refer to
these bits are changed during a conversion, the change will not go into effect until this
conversion is complete (ADIF in ADCSRA register is set).
Bit
Read/Write
Initial Value
REFS1
X
X
0
1
REFS0
Voltage Reference Selections for ADC
REFS1
R/W
0
0
1
1
7
0
REFS0
232.
AREFEN Voltage Reference (V
R/W
6
0
0
1
0
0
ADLAR
R/W
AVcc used as Voltage Reference, disconnected from AREF pin.
External Voltage Reference at AREF pin (AREF
Internal 1.1V Voltage Reference.
Internal 2.56V Voltage Reference.
5
0
MUX4
R/W
4
0
Atmel ATA6616/ATA6617
Table
MUX3
R/W
3
0
4-58. If these bits are changed during a
REF
) Selection
MUX2
R/W
2
0
“ADCL and ADCH – The ADC
MUX1
R/W
Table 4-59
1
0
MUX0
R/W
0
0
2.0V)
for details. If
ADMUX
229