ATMEGA64M1-15MZ Atmel, ATMEGA64M1-15MZ Datasheet - Page 275
ATMEGA64M1-15MZ
Manufacturer Part Number
ATMEGA64M1-15MZ
Description
MCU AVR 64KB FLASH 3PSC 32-VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA64M1-15MZ.pdf
(367 pages)
Specifications of ATMEGA64M1-15MZ
Package / Case
32-VQFN
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Speed
16MHz
Eeprom Size
2K x 8
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
4K x 8
Program Memory Size
64KB (64K x 8)
Data Converters
A/D 11x10b; D/A 1x10b
Oscillator Type
Internal
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Connectivity
CAN, LIN, SPI, UART/USART
Core Size
8-Bit
Processor Series
ATMEGA64x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
4 KB
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATADAPCAN01
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of I /o
-
Lead Free Status / Rohs Status
Details
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- Download datasheet (7Mb)
22. Analog Feature Considerations
22.1
22.2
22.3
7647G–AVR–09/11
Use of an Amplifier as Comparator Input
Use of an Amplifier as Comparator Input and ADC Input
Purpose
The ATmega16/32/64/M1/C1 features several analog features such as ADC, DAC, Amplifiers,
Comparators...
The purpose of this section is to describe the interaction between these features. This section
explains how to set the specific registers to get the system running.
Particularly the different peripheral clocks can interfere together, so special care has to be
considered.
The internal amplifiers provide differential amplification for ADC converter. To allow signed
result with the ADC, the output level of the amplifiers is shifted up with a Vref/2 voltage.
For this reason, when used with a comparator, a Vref/2 voltage is added to the voltage of the
amplifier outputs.
Figure 22-1. Amplifier and Comparator
The amplifier Clock comes from the ADC and is equal to the ADC Clock divided by 8.
The amplifier can be used as ADC input while it is used as comparator input. In that case,
each time the amplifier is selected as ADC input, the sampling and hold circuit of the ADC
loads the amplifier output. It results a decrease of the amplifier output voltage which can tog-
gle the comparator output.
ACMPx
AMPx+
AMPx-
AMPCMPx
Amplifier
Clock
+
-
AMPx
Atmel ATmega16/32/64/M1/C1
Analog Comparator
Negative Input
Comparator
Clock
+
-
ACxEN
Analog Comparator
Output
275
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