ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 110

• 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

9.12.11 PHY_ED_LEVEL – Transceiver Energy Detection Level Register
9.12.12 PHY_CC_CCA – Transceiver Clear Channel Assessment (CCA) Control Register
110
ATmega128RFA1
This register contains the result of an Energy Detection measurement.
• Bit 7:0 – ED_LEVEL7:0 - Energy Detection Level
The minimum ED value (ED_LEVEL = 0) indicates a receiver power less than or equal
to RSSI_BASE_VAL. The range is 84 dB with a resolution of 1 dB and an absolute
accuracy of ±5 dB. A manual ED measurement can be initiated by a write access to this
register. A value of 0xFF signals that no measurement has yet been started (reset
value). The measurement duration is 8 symbol periods (128 µs) for a data rate of 250
kb/s. For High Data Rate Modes the automated measurement duration is reduced to 32
µs. For manually initiated ED measurements in these modes the measurement period is
still 128 µs as long as the receiver is in RX_ON state. A value other than 0xFF indicates
the result of the last ED measurement.
Table 9-41 ED_LEVEL Register Bits
This register is provided to initiate and control a CCA measurement.
• Bit 7 – CCA_REQUEST - Manual CCA Measurement Request
A manual CCA measurement is initiated with setting CCA_REQUEST=1. The end of
the CCA measurement is indicated by the TRX24_CCA_ED_DONE interrupt. Register
bits CCA_DONE and CCA_STATUS of register TRX_STATUS are updated after a
Bit
NA ($147)
Read/Write
Initial Value
Bit
NA ($147)
Read/Write
Initial Value
Bit
NA ($148)
Read/Write
Initial Value
Bit
NA ($148)
Read/Write
Initial Value
Register Bits
ED_LEVEL7:0
CCA_REQUEST
ED_LEVEL7
ED_LEVEL3
CHANNEL3
RW
RW
R
R
7
1
3
1
7
0
3
1
CCA_MODE1
ED_LEVEL6
ED_LEVEL2
CHANNEL2
RW
RW
R
R
6
1
2
1
6
0
2
0
Value
0x00
0x01
0x02
0x54
0xFF
CCA_MODE0
ED_LEVEL5
ED_LEVEL1
CHANNEL1
Description
Minimum result of last ED measurement
P(RF) = RSSI_BASE_VAL+ED [dBm]
...
Maximum result of last ED measurement
Reset value
RW
RW
R
R
5
1
1
1
5
1
1
1
ED_LEVEL4
ED_LEVEL0
CHANNEL4
CHANNEL0
RW
RW
R
R
4
1
0
1
4
0
0
1
8266B-MCU Wireless-03/11
PHY_ED_LEVEL
PHY_ED_LEVEL
PHY_CC_CCA
PHY_CC_CCA