45067A-SAM-R21_Brochure_E_A4_021214_Web.pdf

Atmel SAM R21
ARM Cortex-M0+based IEEE 802.15.4 Wireless MCUs
The Atmel® SAM R21 series of
low-power microcontrollers combines
Key Benefits
the 32-bit ARM® Cortex®-M0+
High performance
These devices are available in 32- and
•
•
•
•
•
48-pin packages with up to 256KB
Low power
processor and an integrated ultra-low
power 2.4GHz ISM band transceiver.
Flash, and 32KB of SRAM. They deliver
a maximum operating frequency of
48MHz and reach 2.14 CoreMark/
MHz. SAM R21 devices are designed
for simple and intuitive migration
with identical peripheral modules,
hex compatible code, identical linear
address map, and pin compatible
migration paths between all devices in
the product series. All devices include
intelligent and flexible peripherals,
Atmel Event System for inter-peripheral
signaling, and support for capacitive
•
•
•
•
48MHz operation
2.14 CoreMark/MHz
Single-cycle IO access
12-channel event system
12-channel DMA
< 70µA/MHz
<3.5μA RAM retention and RTC
Internal and external oscillators
On-the-fly clock switching and prescaling
Robust peripheral set
• Ultra-low power 2.4GHZ transceiver
• Up to five serial communication modules (SERCOM)
configurable as UART/USART, SPI or I2C
• Up to three 16-bit Timer/Counters
• Peripheral Touch Controller that supports buttons, sliders,
wheels and proximity with up to 48 channels
• Real Time Clock (RTC) and Calendar with leap year
correction and 1ppm calibration
• 12-bit 300kbps ADC
• Full Speed USB device and host
World-class tools
•
•
•
•
SAM R21 Xplained Pro starter kits – $39
Atmel Studio with compiler support – Free
Atmel Software Framework – Free
Low-level drivers and stacks – Free
touch button, slider and wheel user
interfaces.
2
© 2014 / www.atmel.com
Atmel SAM R21
ARM Cortex-M0+based IEEE 802.15.4 Wireless MCUs
ARM Cortex-M0+ Processor
PB02
PA31/SWDIO
PA30/SWCLK
VDDIN
VDDCORE
GND
PA28
RESET
PA27
PB23
PB22
45
44
43
42
41
40
39
38
37
GND
XTAL2
3
34
PA25
XTAL1
4
33
PA24
GNDANA
5
32
PA23
VDDANA
6
31
PA22
PA19
AVDD
7
30
DVDD
8
29
GND
VDDIO
XTAL1
2
23
PA25
GNDANA
3
22
PA24
VDDANA
4
21
DVDD
20
46
VDDIO
35
24
5
PB03
36
2
1
AVDD
47
1
PA01
XTAL2
SAM R21E
QFN32
48
PA27
RESET
PA28
GND
VDDCORE
VDDIN
PA30/SWCLK
PA00
25
26
27
28
29
30
31
32
PA31/SWDIO
The most energy-efficient ARM processor yet, the Cortex-M0+ builds on the Cortex-M0 processor—retaining its
full instruction set and tool compatibility—while further reducing energy consumption and increasing performance.
The SAM R21 ARM Cortex-M0+ based MCUs operate at 48MHz and feature a two-stage pipeline, single-cycle I/O
access, single-cycle 32x32 multiplier, event system, and a fast and flexible interrupt controller. They are also highly
efficient, reaching 2.14 CoreMark/MHz – 0.93 DMIPS/MHz.
SAM R21G
QFN48
18
19
20
21
22
23
24
RFN
GNDANA
PA12
PA13
PA14
PA15
PA15
PA14
GNDANA
RFN
RFP
GNDANA
PA09
PA08
RFP
PA16
17
25
GNDANA
12
16
PA17
PA07
PA09
26
15
11
PA08
PA18
PA06
14
PA19
27
13
28
10
GND
9
PA05
VDDIO
PA04
PA16
16
PA17
17
15
18
8
14
7
PA07
13
PA06
12
PA18
11
19
9
6
10
GNDANA
GNDANA
The Atmel SAM R21 series consists of two pin- and code-compatible product series and a total of 24 different
microcontrollers. They all use the same processor, bus matrix, interrupt system and other core features, but they are
differentiated in regards to pin counts, memories, peripheral mix and temperature grades.
Atmel SAM R21
3
SWCLK
SWDIO
Low Power
SERIAL
WIRE
DEVICE
SERVICE
UNIT
M
32/16/8KB
RAM
256/128/64KB
NVM
NVM
CONTROLLER
SRAM
CONTROLLER
CACHE
M
M
S
HIGH SPEED
BUS MATRIX
S
AHB/APB
BRIDGE B
S
M
DMA
USB FS
DEVICE
MINI-HOST
S
AHB/APB
BRIDGE A
AHB/APB
BRIDGE C
PERIPHERAL
ACCESS CONTROLLER
PERIPHERAL
ACCESS CONTROLLER
5 x SERCOM
VREF
BOD33
PAD0
PAD1
PAD2
PAD3
DMA
SYSTEM CONTROLLER
XIN32
XOUT32
S
DP
PERIPHERAL
ACCESS CONTROLLER
PORT
The SAM R21
implements a wide
range of features to
drive down power
consumption, including
low-power oscillators,
clock gating and
prescaling, Atmel
SleepWalking™
technology and a
proprietary low-power
process. All this enables
70μA/MHz in active
mode and <3.5μA with
full RAM retention and
RTC running in sleep
mode.
CORTEX-M0+
PROCESSOR
Fmax 48 MHz
MEMORY
TRACE BUFFER
IOBUS
OSCULP32K
OSC32K
XOSC32K
DMA
WO0
3 x TIMER / COUNTER
OSC8M
WO1
DFLL48M
XOSC
FDPLL96M
POWER MANAGER
CLOCK
CONTROLLER
RESETN
RESET
CONTROLLER
GCLK_IO[n]
SLEEP
CONTROLLER
GENERIC CLOCK
CONTROLLER
REAL TIME
COUNTER
WATCHDOG
TIMER
EXTINT[15..1]
NMI
4
EVENT SYSTEM
XIN
XOUT
WO0
WO1
DMA
3 x TIMER / COUNTER
FOR CONTROL
WOn
AIN[n]
DMA
8-CHANNEL
12-bit ADC 350KSPS
VREFB
2 ANALOG
COMPARATORS
AIN[3..0]
PERIPHERAL
TOUCH
CONTROLLER
X[7..0]
Y[5..0]
EXTERNAL INTERRUPT
CONTROLLER
© 2014 / www.atmel.com
DM
BOF 1KHZ
Atmel SAM R21
ARM Cortex-M0+based IEEE 802.15.4 Wireless MCUs
FS USB 2.0
Micro Trace Buffer
SAM R21 products feature Full Speed USB device
and embedded host. In Device mode, a device can
operate from the internal RC oscillator giving you a
minimum Bill of Materials implementation of a USB
device. The USB drivers are available from Atmel
through the Atmel Software Framework.
The Micro Trace Buffer available in selected SAM R21
devices enables enhanced on-chip debugging with
trace capabilities supported by Atmel and third-party
debuggers.
SERCOM
Peripheral Touch Controller
SAM R21 devices feature multiple instances of the
Serial Communication Module (SERCOM). The
SERCOM is configurable to operate as I2C, SPI or
USART, giving developers extended flexibility to mix
serial interfaces and greater freedom in PCB layout.
Each SERCOM instance can be assigned to different
I/O pins through I/O multiplexing, further increasing
versatility.
An embedded peripheral touch controller (PTC)
makes it easy to add capacitive touch sensing to your
project with buttons, sliders, wheels and proximity. By
offering superb sensitivity and noise tolerance as well
as self-calibration, the PTC eliminates the need for
external components and minimizes CPU overhead.
The PTC supports up to 48 channels on the 48-pin
devices, and 12 channels on the 32-pin devices.
PORT
Timers/Counters
SAM R21 devices include multiple instances of 16-bit
Timer/Counters (TC). Each TC can be individually
programmed to perform frequency and waveform
generation, accurate program execution timing, and
input capture with time and frequency measurement
of digital signals. Each TC can be configured to operate
as 2x8-bit timers, as a 16-bit timer, and two TCs can
be combined to a 32-bit TC. In addition, the SAM R21
features a 32-bit RTC with full calendar and leap year
support.
Hardware and Software Tools
Prototype your designs with the Atmel SAM R21
Xplained Pro, which incorporates an embedded
programmer debugger. If you prefer to use a
standalone programmer/debugger, the Atmel SAMICE™ emulator fully supports the SAM R21 series.
Atmel Studio and the Atmel Software Framework also
support SAM R21 products, providing an easy-to-use
and low-cost development platform to reduce your
time to market.
Timers/Counters for Control
SAM R21 devices have T/CCs, these are Timers/
Counters for control applications like switch mode
power supplies, lighting and motor control. The T/CCs
support up to 96MHz and 24 bit resolution.
Atmel SAM R21
5
Hardware and Software Tools
The Xplained Pro board available for the SAM R21 is perfect for rapid prototyping and development. It features an
embedded programmer and debugger, and easily connects to your computer and Atmel Studio. Several expansion
wings are available for Xplained Pro boards. The wings enable evaluation of different interfaces and peripherals. Wings
are also available from third parties.
Xplained Pro Boards are available for the SAM R21 MCUs
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© 2014 / www.atmel.com
Atmel SAM R21
ARM Cortex-M0+based IEEE 802.15.4 Wireless MCUs
Extension Boards
The PROTO1 extension provides a breadboarding area for general prototyping
with the SAM R21 Xplained Pro boards.
The PROTO1 extension provides a breadboarding area for general prototyping
with the SAM R21 Xplained Pro boards.
The OLED1 wing connects a 128x32 OLED display, LEDs and buttons to the
Xplained Pro.
Ordering Information: SAM R21 Series
Package type
M = QFN
Plating material and temp grade
U = -40 — 85˚C Matte Sn plating
F = -40 — 125˚C Matte Sn plating
Package carrier
T = Tape & Reel
No character = Tray (Default)
SAM R 21 G 18 A - M U T
Product Family
SAM R = Low Power Wireless MCU
Product Series
21 = D21 + 2.4GHz TRX, USB, DMA, TCC, I2C
Pin Count
Marketing Revision
A = Initial Revision
Memory Density
16 = 64kB
17 = 128kB
18 = 256kB
E = 32 pins
G = 48 pins
Atmel SAM R21
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Atmel Corporation
1600 Technology Drive, San Jose, CA 95110 USA
T : (+1)(408) 441. 0311
F : (+1)(408) 436. 4200
|
www.atmel.com
© 2014 Atmel Corporation. / Rev.: Atmel-45067A-SAM-R21_E_A4_022014
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