ATA6617-P3PW Atmel, ATA6617-P3PW Datasheet - Page 237
ATA6617-P3PW
Manufacturer Part Number
ATA6617-P3PW
Description
MCU W/LIN TX/5V REG/WTCDG 38VQFN
Manufacturer
Atmel
Series
AVR® ATA66 LIN-SBCr
Datasheet
1.ATA6617-EK.pdf
(308 pages)
Specifications of ATA6617-P3PW
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
16KB (16K 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
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4.19.1
4.19.1.1
4.19.1.2
9132D–AUTO–12/10
Register Description
ADC Control and Status Register B – ADCSRB
ACSR – Analog Comparator Control and Status Register
• Bit 6 – ACME: Analog Comparator Multiplexer Enable
When this bit is written logic one and the ADC is switched off (ADEN in ADCSRA is zero), the
ADC multiplexer selects the positive input to the Analog Comparator. When this bit is written
logic zero, AIN1 is applied to the positive input of the Analog Comparator.
When the Analog to Digital Converter (ADC) is configured as single ended input channel, it is
possible to select any of the ADC[10..0] pins to replace the positive input to the Analog Com-
parator. The ADC multiplexer (MUX[4..0]) is used to select this input, and consequently, the
ADC must be switched off to utilize this feature.
• Bits 5, 4 – ACIR1, ACIR0: Analog Comparator Internal Voltage Reference Select
When ACIRS bit is set in ADCSRA register, these bits select a voltage reference for the nega-
tive input to the Analog Comparator, see
• Bit 7 – ACD: Analog Comparator Disable
When this bit is written logic one, the power to the Analog Comparator is switched off. This bit
can be set at any time to turn off the Analog Comparator. This will reduce power consumption
in Active and Idle mode. When changing the ACD bit, the Analog Comparator Interrupt must
be disabled by clearing the ACIE bit of ACSR register. Otherwise an interrupt can occur when
the bit is changed.
• Bit 6 – ACIRS: Analog Comparator Internal Reference Select
When this bit is set an Internal Reference Voltage replaces the negative input to the Analog
Comparator (c.f.
If ACIRS is cleared, AIN0 is applied to the negative input to the Analog Comparator.
• Bit 5 – ACO: Analog Comparator Output
The output of the Analog Comparator is synchronized and then directly connected to ACO.
The synchronization introduces a delay of 1 - 2 clock cycles.
• Bit 4 – ACI: Analog Comparator Interrupt Flag
This bit is set by hardware when a comparator output event triggers the interrupt mode defined
by ACIS1 and ACIS0. The Analog Comparator interrupt routine is executed if the ACIE bit is
set and the I-bit in SREG is set. ACI is cleared by hardware when executing the corresponding
interrupt handling vector. Alternatively, ACI is cleared by writing a logic one to the flag.
• Bit 3 – ACIE: Analog Comparator Interrupt Enable
When the ACIE bit is written logic one and the I-bit in the Status Register is set, the Analog
Comparator interrupt is activated. When written logic zero, the interrupt is disabled.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
ACD
R/W
BIN
7
0
Table 4-64 on page
R
7
0
ACIRS
ACME
R/W
R/W
6
0
6
0
ACIR1
ACO
N/A
R/W
R
5
5
0
239).
Table 4-64 on page
ACIR0
R/W
R/W
ACI
4
0
4
0
Atmel ATA6616/ATA6617
ACIE
R/W
—
R
3
0
3
0
ADTS2
ACIC
R/W
R/W
2
0
2
0
239.
ADTS1
ACIS1
R/W
R/W
1
0
1
0
ADTS0 ADCSRB
ACIS0
R/W
R/W
0
0
0
0
ACSR
237
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