ATMEGA256RZBV-8AU Atmel, ATMEGA256RZBV-8AU Datasheet - Page 70

• Manufacturer Part Number: ATMEGA256RZBV-8AU
• Description: MCU ATMEGA2560/AT86RF230 100TQFP
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA256RZBV-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: 100-TQFP
• Wireless Frequency: 2.4 GHz
• Interface Type: JTAG, SPI
• Output Power: 3 dBm
• Operating Temperature Range: - 55 C to + 125 C
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG 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

70
AT86RF230
Bit
0x12
Read/Write
Initial value
Bit
0x12
Read/Write
Initial value
• Bit [2:0] – CLKM_CTRL
The register bits CLKM_CTRL set clock rate of pin CLKM.
Table 9-11. Clock Rate at Pin CLKM
Register 0x12 (XOSC_CTRL)
The register XOSC_CTRL controls the operation of the crystal oscillator.
• Bit [7:4] – XTAL_MODE
The register bit XTAL_MODE sets the operating mode of the crystal oscillator.
Table 9-12. Crystal Oscillator Operating Mode
• Bit [3:0] – XTAL_TRIM
The register bits XTAL_TRIM 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 9-13. Crystal Oscillator Trimming Capacitors
Register Bit
Register Bit
CLKM_CTRL
Register Bit
XTAL_MODE
Register Bit
XTAL_TRIM
R/W
R/W
7
1
3
0
Value
0x0
0x4
0xF
Value
Value
Value
0x0
1
0
1
2
3
4
5
6
7
R/W
R/W
6
1
2
0
XTAL_MODE
XTAL_TRIM
Description
CLKM clock rate changes after SLEEP cycle
Description
No clock, pin set to logic low
1 MHz
2 MHz
4 MHz
8 MHz
16 MHz
Reserved
Reserved
Description
Crystal oscillator disabled, no clock signal is fed to the
internal circuitry.
Internal crystal oscillator disabled, use external
reference frequency
Internal crystal oscillator enabled
Description
0.0 pF, trimming capacitors disconnected
R/W
R/W
5
1
1
0
R/W
R/W
4
1
0
0
5131E-MCU Wireless-02/09
XOSC_CTRL
XOSC_CTRL