ATMEGA64A-MNR Atmel, ATMEGA64A-MNR Datasheet - Page 250

IC MCU AVR 64K FLASH 8QFN

ATMEGA64A-MNR

Manufacturer Part Number
ATMEGA64A-MNR
Description
IC MCU AVR 64K FLASH 8QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet

Specifications of ATMEGA64A-MNR

Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
SPI, UART, I2C
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
53
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Operating Temperature Range
- 40 C to + 85 C
Processor To Be Evaluated
ATMEGA64A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
23.9.3
23.9.3.1
23.9.3.2
8160C–AVR–07/09
ADCL and ADCH – The ADC Data Register
ADLAR = 0
ADLAR = 1
• Bits 2:0 – ADPS2:0: ADC Prescaler Select Bits
These bits determine the division factor between the XTAL frequency and the input clock to the
ADC.
Table 23-5.
When an ADC conversion is complete, the result is found in these two registers. If differential
channels are used, the result is presented in two’s complement form.
When ADCL is read, the ADC Data Register is not updated until ADCH is read. Consequently, if
the result is left adjusted and no more than 8-bit precision is required, it is sufficient to read
ADCH. Otherwise, ADCL must be read first, then ADCH.
The ADLAR bit in ADMUX, and the MUXn bits in ADMUX affect the way the result is read from
the registers. If ADLAR is set, the result is left adjusted. If ADLAR is cleared (default), the result
is right adjusted.
Bit
0x05 (0x25)
0x04 (0x24)
Read/Write
Initial Value
Bit
0x05 (0x25)
0x04 (0x24)
Read/Write
Initial Value
ADPS2
0
0
0
0
1
1
1
1
ADC7
ADC9
ADC1
ADC Prescaler Selections
15
15
R
R
R
R
7
0
0
7
0
0
ADC6
ADC8
ADC0
14
14
R
R
R
R
6
0
0
6
0
0
ADPS1
0
0
1
1
0
0
1
1
ADC5
ADC7
13
13
R
R
R
R
5
0
0
5
0
0
ADC4
ADC6
12
12
R
R
R
R
4
0
0
4
0
0
ADPS0
0
1
0
1
0
1
0
1
ADC3
ADC5
11
11
R
R
R
R
3
0
0
3
0
0
ADC2
ADC4
10
10
R
R
R
R
2
0
0
2
0
0
ADC9
ADC1
ADC3
Division Factor
R
R
R
R
9
1
0
0
9
1
0
0
ATmega64A
128
16
32
64
2
2
4
8
ADC8
ADC0
ADC2
R
R
R
R
8
0
0
0
8
0
0
0
ADCH
ADCH
ADCL
ADCL
250

Related parts for ATMEGA64A-MNR