ATXMEGA16A4-CU Atmel, ATXMEGA16A4-CU Datasheet - Page 237
ATXMEGA16A4-CU
Manufacturer Part Number
ATXMEGA16A4-CU
Description
MCU AVR 16+4KB FLASH 49VFBGA
Manufacturer
Atmel
Series
AVR® XMEGAr
Specifications of ATXMEGA16A4-CU
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
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K 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
Processor Series
ATXMEGA16x
Core
AVR8
Data Bus Width
8 bit, 16 bit
Data Ram Size
2 KB
Interface Type
I2C/SPI/USART
Maximum Clock Frequency
32 MHz
Number Of Programmable I/os
34
Number Of Timers
5
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-ch x 12-bit
On-chip Dac
2-ch x 12-bit
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 237 of 445
- Download datasheet (6Mb)
21.3
21.3.1
8077H–AVR–12/09
Clock Generation
Internal Clock Generation - The Fractional Baud Rate Generator
The clock used for baud rate generation, and for shifting and sampling data bits is generated
internally by the Fractional Baud Rate Generator or externally from the Transfer Clock (XCK)
pin. Five modes of clock generation are supported: Normal and Double Speed asynchronous
mode, Master and Slave synchronous mode, and Master SPI mode.
Figure 21-2. Clock Generation Logic, Block Diagram.I
The Fractional Baud Rate Generator is used for internal clock generation for asynchronous
modes, synchronous master mode, and SPI master mode operation. The generated output fre-
quency (f
Peripheral Clock frequency (f
baud rate (in bits per second) and for calculating the BSEL value for each mode of operation.
BSEL can be set to any value between 0 and 4095. It also show the maximum baud rate versus
peripheral clock speed.
Fractional baud rate generation can be used in asynchronous mode of operation to increase the
average resolution. A scale factor (BSCALE) allows the baud rate to be optionally left or right
scaled. Choosing a positive scale value will results in right scaling, which increase the period
and consequently reduce the frequency of the produced baud rate, without changing the resolu-
tion. If the scale value is negative the divider uses fractional arithmetic counting to increase the
resolution by distributing the fractional divide value over time. BSCALE can be set to any value
from -7 to +7, where 0 implies no scaling. There is a limit to how high the scale factor can be and
the value 2
see
PORT_INV
DDR_XCK
XCK
Pin
Section 21.9 on page 246
BAUD
BSCALE
xcko
xcki
) is given by the period setting (BSEL), an optional scale setting (BSACLE) and the
f
OSC
must be at least half of the minimum number of clock cycles a frame takes,
Baud Rate
Generator
Register
BSEL
Sync
PER
for more details.
).
f
BAUD
Table 21-1 on page 238
Detector
Edge
/2
/4
contains equations for calculating the
/2
DDR_XCK
CLK2X
XMEGA A
0
1
0
1
0
1
1
0
UMSEL [1]
txclk
rxclk
237
Related parts for ATXMEGA16A4-CU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
DEV KIT FOR AVR/AVR32
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: