ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 408

• Manufacturer Part Number: ATMEGA128RFA1-ZU
• Description: IC AVR MCU 2.4GHZ XCEIVER 64QFN
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA128RFA1-ZU

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 3.5dBm
• Sensitivity: -100dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 12.5mA
• Current - Transmitting: 14.5mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB Flash, 4kB EEPROM, 16kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN, Exposed Pad
• Rf Ic Case Style: QFN
• No. Of Pins: 64
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Processor Series: ATMEGA128x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 16 KB
• Interface Type: JTAG
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 6
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVR128RFA1-EK1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26.2 Register Description
26.2.1 ACSR – Analog Comparator Control And Status Register
408
ATmega128RFA1
• 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 in ACSR. Otherwise an
interrupt can occur when the bit is changed.
• Bit 6 – ACBG - Analog Comparator Bandgap Select
When this bit is set, a fixed bandgap reference voltage connects to the positive input of
the Analog Comparator. When this bit is cleared, AIN0 is applied to the positive input of
the Analog Comparator. When the bandgap reference is used as the input of the
Analog Comparator, it will take a certain time for the voltage to stabilize. If not
stabilized, the first comparison may give a wrong value. See section "Internal Voltage
Reference" for details.
• Bit 5 – ACO - Analog Compare 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 hard-ware 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 2 – ACIC - Analog Comparator Input Capture Enable
When written logic one, this bit enables the input capture function in Timer/Counter1 to
be triggered by the Analog Comparator. The comparator output is in this case directly
connected to the input capture front-end logic, making the comparator utilize the noise
canceler and edge select features of the Timer/Counter1 Input Capture interrupt. When
written logic zero, no connection between the Analog Comparator and the input capture
function exists. To make the comparator trigger the Timer/Counter1 Input Capture
interrupt, the ICIE1 bit in the Timer Interrupt Mask Register (TIMSK1) must be set.
Bit
$30 ($50)
Read/Write
Initial Value
ACME
1
1
1
ADEN
0
0
0
ACD
RW
7
0
MUX5
ACBG
RW
0
0
0
6
0
ACO
MUX2:0
NA
R
5
101
110
111
RW
ACI
4
0
ACIE
RW
Analog Comparator Negative Input
3
0
ACIC
RW
2
0
ADC5
ADC6
ADC7
ACIS1
RW
1
0
8266A-MCU Wireless-12/09
ACIS0
RW
0
0
ACSR