ATmega64M1 Atmel Corporation, ATmega64M1 Datasheet - Page 247

• Manufacturer Part Number: ATmega64M1
• Manufacturer: Atmel Corporation

Specifications of ATmega64M1

• Flash (kbytes): 64 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 27
• Ext Interrupts: 27
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Can: 1
• Lin: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 14
• Input Capture Channels: 1
• Pwm Channels: 10
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

21.10.8
8209D–AVR–11/10
AMP0CSR – Amplifier 0 Control and Status register
• Bit 6:0 – ADC10D..8D, ACMP0D, ACMP1D, ACMP3D, AMP0PD, AMP0ND, AMP1PD,
When this bit is written logic one, the digital input buffer on the corresponding ADC pin is dis-
abled. The corresponding PIN Register bit will always read as zero when this bit is set. When an
analog signal is applied to an analog pin and the digital input from this pin is not needed, this bit
should be written logic one to reduce power consumption in the digital input buffer.
Bit
Read/Write
Initial Value
• Bit 7 – AMP0EN: Amplifier 0 Enable Bit
Set this bit to enable the Amplifier 0.
Clear this bit to disable the Amplifier 0.
Clearing this bit while a conversion is running will take effect at the end of the conversion.
Warning: Always clear AMP0TS0:1 when clearing AMP0EN.
• Bit 6 – AMP0IS: Amplifier 0 Input Shunt
Set this bit to short-circuit the Amplifier 0 input.
Clear this bit to normally use the Amplifier 0.
• Bit 5:4 – AMP0G[1:0]: Amplifier 0 Gain Selection Bits
These 2 bits determine the gain of the amplifier 0.
The different setting are shown in
Table 21-8.
To ensure an accurate result, after the gain value has been changed, the amplifier input needs
to have a quite stable input value during at least 4 Amplifier synchronization clock periods.
• Bit 3 – AMPCMP0: Amplifier 0 - Comparator 0 connection
Set this bit to connect the amplifier 0 to the comparator 0 positive input. In this configuration the
comparator clock is adapted to the amplifier clock and AMP0TS[2:0] bits have no effect.
Clear this bit to normally use the Amplifier 0.
• Bit 2:0 – AMP0TS[2:0]: Amplifier 0 Clock Source Selection Bits
In accordance with the
the clock for the amplifier 0. This clock source is necessary to start the conversion on the ampli-
fied channel.
AMP0G[1:0]
AMP1ND, AMP2PD:
ADC10..8, ACMP0, ACMP1, ACMP3, AMP0P, AMP0N, AMP1P, AMP1N, AMP2P Digital
Input Disable
00
01
10
11
Amplifier 0 Gain Selection
AMP0EN
R/W
7
0
Table 21-9 on page
AMP0IS
R/W
6
0
AMP0G1
Table
R/W
5
0
21-8.
AMP0G0
248, these 3 bits select the event which will generate
R/W
4
0
ATmega16M1/32M1/64M1
AMPCMP0
Description
R/W
Gain 10
Gain 20
Gain 40
Gain 5
3
0
AMP0TS2
R/W
2
0
AMP0TS1
R/W
1
0
AMP0TS0
R/W
0
0
AMP0CSR
247