ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 88

• Manufacturer Part Number: ATXMEGA256A3B-MH
• Description: MCU AVR 256KB FLASH A3B 64-QFN
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA256A3B-MH

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Size: 256KB (128K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 3.6 V
• Data Converters: A/D 16x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• Processor Series: ATXMEGA256x
• Core: AVR8
• Data Bus Width: 8 bit, 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 49
• Number Of Timers: 7
• Operating Supply Voltage: 1.6 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: ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 12 bit, 2 Channel
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATXMEGA256A3B-MU; ATXMEGA256A3B-MU

7.10.2
7.10.3
8077H–AVR–12/09
STATUS - Oscillator Status Register
XOSCCTRL - XOSC Control Register
• Bit 7:5 - Reserved
These bits are reserved and will always be read as zero. For compatibility with future devices,
always write these bits to zero when this register is written.
• Bit 4 - PLLRDY: PLL Ready
The PLLRDY flag is set when the PLL has locked on selected frequency and ready to be used
as he System Clock source.
• Bit 3 - XOSCRDY: External clock source Ready
The XOSCRDY flag is set when the external clock source is stable and ready to be used as the
System Clock source.
• Bit 2 - RC32KRDY: 32.768 kHz Internal RC Oscillator Ready
The RC32KRDY flag is set when the 32.768 kHz internal RC oscillator is stable and ready to be
used as the System Clock source.
• Bit 1 - RC32MRDY: 32 MHz Internal RC Oscillator Ready
The R32MRFY flag is set when the 32 MHz internal RC oscillator is stable and ready to be used
as the System Clock source.
• Bit 0 - RC2MRDY: 2 MHz Internal RC Oscillator Ready
The RC2MRDY flag is set when the 2 MHz internal RC oscillator is stable and is ready to be
used as the System Clock source.
• Bit 7:6 - FRQRANGE[1:0]: Crystal Oscillator Frequency Range Select
These bits select the frequency range for the connected crystal oscillator according to
on page
Bit
+0x02
Read/Write
Initial Value
Bit
+0x01
Read/Write
Initial Value
89.
R/W
FRQRANGE[1:0]
R
7
0
7
0
-
R/W
R
6
0
-
6
0
X32KLPM
R
5
0
-
R/W
5
0
PLLRDY
R
4
0
R
4
0
-
XOSCRDY
R
3
0
R/W
3
0
RC32KRDY
R/W
R
2
0
2
0
XOSCSEL[3:0]
R32MRDY
R/W
1
0
R
1
0
XMEGA A
RC2MRDY
R/W
0
0
R
0
0
Table 7-5
XOSCCTRL
STATUS
88