ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 174

• 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

12.6.11 LLDRH – Low Leakage Voltage Regulator Data Register (High-Byte)
174
ATmega128RFA1
• Bit 3 – LLCAL - Calibration Active
This bit indicates that the automatic calibration is in progress. The analog part of the
calibration circuit is powered up if the bit is 1.
• Bit 2 – LLTCO - Temperature Coefficient of Current Source
This bit shows the status of the selection of the temperature coefficient. The state of the
bit is updated in the course of the automatic calibration. A valid value is present after
the LLDONE bit is 1 for the first time. Write access is only enabled when the automatic
calibration is turned off (LLENCAL is 0). This bit should not be changed without further
information.
• Bit 1 – LLSHORT - Short Lower Calibration Circuit
This bit shows the status of the short switch for the lower calibration circuit. The state of
the bit is updated in the course of the automatic calibration. A valid value is present
after the LLDONE bit is 1 for the first time. If this bit is set to 1 register LLDRL has no
function. Write access is only possible when the automatic calibration is turned off
(LLENCAL is 0). This bit should not be changed without further information.
• Bit 0 – LLENCAL - Enable Automatic Calibration
This bit enables the automatic calibration. The automatic calibration runs if the state of
the bit is 1. Write access to the two data register and the bits LLSHORT and LLTCO is
then denied. If the state of LLENCAL is 0 then the calibration algorithm is stopped and
the output voltage of the low-leakage voltage regulator is defined by the values in the
two data register LLDRL and LLDRH and by the bits LLSHORT and LLTCO.
The high-byte of the calibration data can be accessed through this register. Write
access is only enabled when the bit LLENCAL of the LLCR register is 0. Then the data
bits LLDRH4:0 directly control the output voltage of the low-leakage voltage regulator.
Higher numbers generate lower voltages. If the bit LLENCAL is 1 then the results of the
automatic calibration are stored.
• Bit 7:5 – Res2:0 - Reserved
These bits are reserved for future use.
• Bit 4:0 – LLDRH4:0 - High-Byte Data Register Bits
Value of the high-byte calibration result
Table 12-5 LLDRH Register Bits
Bit
NA ($131)
Read/Write
Initial Value
Register Bits
LLDRH4:0
Res2
R
7
0
Res1
R
6
0
Res0
R
5
0
Value
0x00
0x10
LLDRH4 LLDRH3 LLDRH2 LLDRH1 LLDRH0
RW
4
0
Description
Calibration limit for fast process corner/high
output voltage
Calibration limit for slow process corner/low
output voltage
RW
3
0
RW
2
0
RW
1
0
8266B-MCU Wireless-03/11
RW
0
0
LLDRH