ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 118

• 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

9.12.23 RX_SYN – Transceiver Receiver Sensitivity Control Register
118
ATmega128RFA1
This register controls the operation of the 16MHz crystal oscillator.
• Bit 7:4 – XTAL_MODE3:0 - Crystal Oscillator Operating Mode
These register bits set the operating mode of the 16 MHz crystal oscillator. For normal
operation the default value is set to XTAL_MODE = 0xF after reset. For use with an
external clock source it is recommended to set XTAL_MODE = 0x4.
Table 9-58 XTAL_MODE Register Bits
• Bit 3:0 – XTAL_TRIM3:0 - Crystal Oscillator Load Capacitance Trimming
These register bits control two internal capacitance arrays connected to pins XTAL1
and XTAL2. A capacitance value in the range from 0 pF to 4.5 pF is selectable with a
resolution of 0.3 pF.
Table 9-59 XTAL_TRIM Register Bits
Bit
NA ($152)
Read/Write
Initial Value
Bit
NA ($155)
Read/Write
Initial Value
Bit
NA ($155)
Read/Write
Initial Value
Bit
NA ($155)
Read/Write
Initial Value
Bit
NA ($155)
Read/Write
Initial Value
Register Bits
XTAL_MODE3:0
Register Bits
XTAL_TRIM3:0
XTAL_TRIM3
RW
3
0
RX_PDT_LEVEL3
RX_PDT_LEVEL1
RX_PDT_DIS
Res1
RW
RW
RW
R
7
0
5
0
3
0
1
0
XTAL_TRIM2
RW
2
0
Value
Value
0xF
0xF
0x4
0x0
0x1
0x2
XTAL_TRIM1
Description
Internal crystal oscillator disabled; use
external reference frequency.
Internal crystal oscillator enabled; amplitude
regulation of oscillation enabled.
Description
0.0 pF, trimming capacitors disconnected
0.3 pF, trimming capacitor switched on
...
4.5 pF, trimming capacitor switched on
RW
1
0
RX_PDT_LEVEL2
RX_PDT_LEVEL0
Res2
Res0
RW
RW
R
R
6
0
4
0
2
0
0
0
XTAL_TRIM0
RW
0
0
8266A-MCU Wireless-12/09
XOSC_CTRL
RX_SYN
RX_SYN
RX_SYN
RX_SYN