ATXMEGA32A4-CUR Atmel, ATXMEGA32A4-CUR Datasheet - Page 87

• Manufacturer Part Number: ATXMEGA32A4-CUR
• Description: MCU AVR 32+4 FLASH 49VFBGA
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA32A4-CUR

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 3.6 V
• Data Converters: A/D 12x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 49-VFBGA
• 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

7.10
7.10.1
8077H–AVR–12/09
Register Description - Oscillator
CTRL - Oscillator Control Register
• Bit 0 - RTCEN: RTC Clock Source Enable
Setting the RTCEN bit enables the selected clock source for the Real Time Counter.
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
• Bit 4 - PLLEN: PLL Enable
Setting this bit enables the PLL. Before the PLL is enabled, it should be configured with the
desired multiplication factor and input source.
page
• Bit 3 - XOSCEN: External Oscillator Enable
Setting this bit enables the selected external clock source, refer to
Register” on page 88
external clock source should be allowed time to become stable before it is selected as source for
the System Clock.
• Bit 2 - RC32KEN: 32.768 kHz Internal RC Oscillator Enable
Setting this bit enables the 32.768 kHz internal RC oscillator. The oscillator must be stable
before it is selected as source for the System Clock.
on page 88.
• Bit 1- RC32MEN: 32 MHz Internal RC Oscillator Enable
Setting this bit will enable the 32 MHz internal RC oscillator. The oscillators should be allowed
time to become stable before wither is selected as source for the System Clock.
Oscillator Status Register” on page 88.
• Bit 0 - RC2MEN: 2 MHz Internal RC Oscillator enable
Setting this bit enables the 2MHz internal RC oscillator. The oscillator should be allowed time to
become stable before wither is selected as source for the System Clock.
lator Status Register” on page 88.
By default the 2 Mhz Internal RC Oscillator is enabled and this bit is set.
Bit
+0x00
Read/Write
Initial Value
• Bit 7:5 - Reserved
88..
R
7
0
-
See ”STATUS - Oscillator Status Register” on page 88.
for details on how to select and enable an external clock source. The
R
6
0
-
R
5
0
-
PLLEN
R/W
4
0
See ”STATUS - Oscillator Status Register” on
XOSCEN
R/W
3
0
See ”STATUS - Oscillator Status Register”
RC32KEN
R/W
2
0
”XOSCCTRL - XOSC Control
RC32MEN
R/W
1
0
See ”STATUS - Oscil-
XMEGA A
RC2MEN
R/W
See ”STATUS -
0
1
CTRL
87