ATMEGA256RZAV-8AU Atmel, ATMEGA256RZAV-8AU Datasheet - Page 63
![MCU ATMEGA2561/AT86RF230 64-TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA256RZAV-8AU
Manufacturer Part Number
ATMEGA256RZAV-8AU
Description
MCU ATMEGA2561/AT86RF230 64-TQFP
Manufacturer
Atmel
Series
ATMEGAr
Datasheets
1.ATMEGA640V-8CU.pdf
(38 pages)
2.ATMEGA640V-8CU.pdf
(444 pages)
3.AT86RF230-ZU.pdf
(98 pages)
Specifications of ATMEGA256RZAV-8AU
Frequency
2.4GHz
Modulation Or Protocol
802.15.4 Zigbee
Applications
ISM, ZigBee™
Power - Output
3dBm
Sensitivity
-101dBm
Voltage - Supply
1.8 V ~ 3.6 V
Current - Receiving
15.5mA
Current - Transmitting
16.5mA
Data Interface
PCB, Surface Mount
Memory Size
256kB Flash, 4kB EEPROM, 8kB RAM
Antenna Connector
PCB, Surface Mount
Package / Case
64-TQFP
Wireless Frequency
2.4 GHz
Interface Type
JTAG, SPI
Output Power
3 dBm
For Use With
ATAVRISP2 - PROGRAMMER AVR IN SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Operating Temperature
-
Data Rate - Maximum
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
ATmega256
9.4.2 Configure the Voltage Regulators
9.4.3 Data Interpretation
9.4.4 Register Description
5131E-MCU Wireless-02/09
Bit
0x10
Read/Write
Initial value
Bit
0x10
Read/Write
Initial value
The voltage regulators can be configured by the register 0x10 (VREG_CTRL).
It is recommended to use the internal regulators, but it is also possible to supply the low
voltage domains by an external voltage source. For this configuration, the internal
regulators need to be switched off by setting the register bits to the values
AVREG_EXT = 1 and DVREG_EXT = 1. A regulated external supply voltage of 1.8V
needs to be connected to the pins DVDD and AVDD. When turning on the external
supply, ensure a sufficiently long stabilization time before interacting with the
AT86RF230.
The status bit values AVDD_OK = 1 and DVDD_OK = 1 indicate an enabled and stable
internal supply voltage. Reading 0 indicates a disabled or unstable internal supply
voltage.
Register 0x10 (VREG_CTRL)
This register VREG_CTRL controls the use of the voltage regulators and indicates the
status of these.
• Bit 7 – AVREG_EXT
The register bit AVREG_EXT defines whether the internal analog voltage regulator or
an external regulator is used to supply the analog low voltage building blocks of the
radio transceiver.
Table 9-2. Regulated Voltage Supply Control for Analog Building Blocks
• Bit 6 – AVDD_OK
This register bit AVDD_OK indicates if the internal 1.8V regulated supply voltage AVDD
has settled. The bit is set to logic high, if AVREG_EXT = 1.
Table 9-3 Regulated Voltage Supply Control for Analog Building Blocks
Register Bit
AVREG_EXT
Register Bit
AVDD_OK
AVREG_EXT
DVREG_EXT
R/W
R/W
7
0
3
0
Value
Value
0
1
0
1
AVDD_OK
DVDD_OK
R
R
6
0
2
0
Description
Use internal voltage regulator
Use external voltage regulator, internal voltage
regulator is disabled
Description
Analog voltage regulator disabled or supply voltage not
stable
Analog supply voltage has settled
R/W
R/W
5
0
1
0
Reserved
Reserved
R/W
R/W
AT86RF230
4
0
0
0
VREG_CTRL
VREG_CTRL
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