ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 428

• 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

27.11.2 ADCSRB – ADC Control and Status Register B
428
ATmega128RFA1
ADCSRA is set). Note that the MUX5 bit is located in the ADCSRB register. A write
access to the MUX4:0 bits triggers the update of the internally buffered MUX5 bit, see
"Accessing the ADMUX Register" on page 417
Bit
NA ($7B)
Read/Write
Initial Value
• Bit 7 – AVDDOK: AVDD Supply Voltage OK
The analog functions of the ADC are powered from the AVDD domain. AVDD is
supplied from an internal voltage regulator. Setting the ADEN bit in register ADCSRA
will power-up the AVDD domain if not already requested by another functional group of
the device. The bit allows the user to monitor (poll) the status of the AVDD domain. A
status of 1 indicates that AVDD has been powered-up.
• Bit 6 – ACME: Analog Comparator Multiplexer Enable
This bit is used for the Analog Comparator only. See
Status Register B" on page 409
• Bit 5 – REFOK: Reference Voltage OK
The status of the internal generated reference voltage can be monitored through this
bit. Setting the ADEN bit in register ADCSRA will enable the reference voltage for the
ADC according to the REFSn bits in the ADMUX register. The reference voltage will be
available after a start-up delay. A REFOK value of 1 indicates that the internal
generated reference voltage is approaching final levels.
• Bit 4 – ACCH: Analog Channel Change
The user can force a reset of the analog blocks by setting this bit to 1 without
requesting a different channel. The analog blocks of the ADC will be reset to handle
possible new voltage ranges. Such a reset phase is especially important for the gain
amplifier. It could be temporarily disabled by a large step of its input common voltage
leading to erroneous A/D conversion results. ACCH will read as one until the reset
phase of the analog blocks can be entered.
• Bit 3 – MUX5: Analog Channel and Gain Selection Bit
This bit is used together with MUX4:0 in ADMUX to select the analog input signals
connected to the ADC. See the following table for details. If this bit is changed during a
conversion, the change will not go in effect until this conversion is complete. Note that
the MUX5 bit is internally buffered and a write access to the MUX4:0 bits is required to
trigger the update of the MUX5 bit, see
Table 27-11. Input Channel Selections
000000
000001
000010
000011
000100
000101
MUX5:0
AVDDOK
R
7
0
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
Single Ended
ACME
Input
R/W
6
0
REFOK
R
5
0
for details.
Positive Differential
ACCH
R/W
4
0
"Accessing the ADMUX Register" on page 417
Input
MUX5
R/W
.
3
0
ADTS2
R/W
2
0
"ADCSRB – ADC Control and
Negative Differential
N/A
ADTS1
R/W
1
0
Input
8266A-MCU Wireless-12/09
ADTS0
R/W
0
0
ADCSRB
Gain
.