ATxmega128D4 Atmel Corporation, ATxmega128D4 Datasheet - Page 66
ATxmega128D4
Manufacturer Part Number
ATxmega128D4
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128D4
Flash (kbytes)
128 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Speed
No
Usb Interface
No
Spi
4
Twi (i2c)
2
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
200
Analog Comparators
2
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
8
Eeprom (bytes)
2048
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.6 to 3.6
Operating Voltage (vcc)
1.6 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
14
Input Capture Channels
14
Pwm Channels
14
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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6.10
6.10.1
8210B–AVR–04/10
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 67.
• Bit 3 - XOSCEN: External Oscillator Enable
Setting this bit enables the selected external clock source, refer to
Register” on page 67
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 67.
• 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 67.
• 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 67.
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
R
7
–
0
See ”STATUS - Oscillator Status Register” on page 67.
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 D
RC2MEN
R/W
See ”STATUS -
0
1
CTRL
66
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