11011s

Features
• Core
•
•
•
•
•
•
•
– ARM® Cortex®-M3 revision 2.0 running at up to 48 MHz
– Thumb®-2 instruction
– 24-bit SysTick Counter
– Nested Vector Interrupt Controller
Pin-to-pin compatible with SAM7S legacy products (48- and 64-pin versions) and
SAM3S (48-, 64- and 100-pin versions)
Memories
– From 16 to 256 Kbytes embedded Flash, 128-bit wide access, memory accelerator,
single plane
– From 4 to 24 Kbytes embedded SRAM
– 16 Kbytes ROM with embedded bootloader routines (UART) and IAP routines
System
– Embedded voltage regulator for single supply operation
– Power-on-Reset (POR), Brown-out Detector (BOD) and Watchdog for safe
operation
– Quartz or ceramic resonator oscillators: 3 to 20 MHz main power with Failure
Detection and optional low power 32.768 kHz for RTC or device clock
– High precision 8/12 MHz factory trimmed internal RC oscillator with 4 MHz default
frequency for device startup. In-application trimming access for frequency
adjustment
– Slow Clock Internal RC oscillator as permanent low-power mode device clock
– One PLL up to 130 MHz for device clock
– Up to 10 peripheral DMA (PDC) channels
Low Power Modes
– Sleep and Backup modes, down to 3 µA in Backup mode
– Ultra low power RTC
Peripherals
– Up to 2 USARTs with RS-485 and SPI mode support. One USART (USART0) has
ISO7816, IrDA® and PDC support in addition
– Two 2-wire UARTs
– 2 Two Wire Interface (I2C compatible), 1 SPI
– Up to 6 Three-Channel 16-bit Timer/Counter with capture, waveform, compare and
PWM mode. Quadrature Decoder Logic and 2-bit Gray Up/Down Counter for
Stepper Motor
– 4-channel 16-bit PWM
– 32-bit Real-time Timer and RTC with calendar and alarm features
– Up to 16 channels, 384 KSPS 10-bit ADC
– One 500 KSPS 10-bit DAC
I/O
– Up to 79 I/O lines with external interrupt capability (edge or level sensitivity),
debouncing, glitch filtering and on-die Series Resistor Termination
– Three 32-bit Parallel Input/Output Controllers
Packages
– 100-lead LQFP, 14 x 14 mm, pitch 0.5 mm/100-ball TFBGA, 9 x 9 mm, pitch 0.8 mm
– 64-lead LQFP, 10 x 10 mm, pitch 0.5 mm/64-pad QFN 9x9 mm, pitch 0.5 mm
– 48-lead LQFP, 7 x 7 mm, pitch 0.5 mm/48-pad QFN 7x7 mm, pitch 0.5 mm
AT91SAM
ARM-based
Flash MCU
SAM3N Series
Summary
11011BS–ATARM–22-Feb-12
1. SAM3N Description
Atmel's SAM3N series is a member of a family of Flash microcontrollers based on the high performance 32-bit ARM Cortex-M3 RISC processor. It operates at a maximum speed of 48 MHz
and features up to 256 Kbytes of Flash and up to 24 Kbytes of SRAM. The peripheral set
includes 2x USARTs, 2x UARTs, 2x TWIs, 3x SPI, as well as 1 PWM timer, 6x general purpose
16-bit timers, an RTC, a 10-bit ADC and a 10-bit DAC.
The SAM3N series is ready for capacitive touch thanks to the QTouch library, offering an easy
way to implement buttons, wheels and sliders.
The SAM3N device is an entry-level general purpose microcontroller. That makes the SAM3N
the ideal starting point to move from 8- /16-bit to 32-bit microcontrollers.
It operates from 1.62V to 3.6V and is available in 48-pin, 64-pin and 100-pin QFP, 48-pin and
64-pin QFN, and 100-pin BGA packages.
The SAM3N series is the ideal migration path from the SAM3S for applications that require a
reduced BOM cost. The SAM3N series is pin-to-pin compatible with the SAM3S series. Its
aggressive price point and high level of integration pushes its scope of use far into cost-sensitive, high-volume applications.
2
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
1.1
Configuration Summary
The SAM3N4/2/1/0/00 differ in memory size, package and features list. Table 1-1 summarizes
the configurations of the 9 devices.
Table 1-1.
Configuration Summary
Number
of PIOs
ADC
Timer
PDC
Channels
USART
DAC
LQFP48
QFN48
34
8 channels
6(1)
8
1
_
24 Kbytes
LQFP64
QFN64
47
10 channels
6(2)
10
2
1
256 Kbytes
24 Kbytes
LQFP100
BGA100
79
16 channels
6
10
2
1
SAM3N2A
128 Kbytes
16 Kbytes
LQFP48
QFN48
34
8 channels
6(1)
8
1
_
SAM3N2B
128 Kbytes
16 Kbytes
LQFP64
QFN64
47
10 channels
6((2)
10
2
1
SAM3N2C
128 Kbytes
16 Kbytes
LQFP100
BGA100
79
16 channels
6
10
2
1
SAM3N1A
64 Kbytes
8 Kbytes
LQFP48
QFN48
34
8 channels
6(1)
8
1
_
SAM3N1B
64 Kbytes
8 Kbytes
LQFP64
QFN64
47
10 channels
6(2)
10
2
1
SAM3N1C
64 Kbytes
8 Kbytes
LQFP100
BGA100
79
16 channels
6
10
2
1
SAM3N0A
32 Kbytes
8 Kbytes
LQFP48
QFN48
34
8 channels
6(1)
8
1
_
SAM3N0B
32 Kbytes
8 Kbytes
LQFP64
QFN64
47
10 channels
6(2)
10
2
1
SAM3N0C
32 Kbytes
8 Kbytes
LQFP100
BGA100
79
16 channels
6
10
2
1
SAM3N00A
16 Kbytes
4 KBytes
LQFP48
QFN48
34
8 channels
6(1)
8
1
_
SAM3N00B
16 Kbytes
4 KBytes
LQFP64
QFN64
47
10 channels
6(2)
10
2
1
Device
Flash
SRAM
Package
SAM3N4A
256 Kbytes
24 Kbytes
SAM3N4B
256 Kbytes
SAM3N4C
Notes:
1. Only two TC channels are accessible through the PIO.
2. Only three TC channels are accessible through the PIO.
3
11011BS–ATARM–22-Feb-12
2. SAM3N Block Diagram
System Controller
UT
VD
DO
JT
AG
VD
DI
N
SE
L
SAM3N 100-pin version Block Diagram
TD
TDI
O
TM /TR
S A
TC /SW CE
K/ D SW
SW IO O
CL
K
Figure 2-1.
Voltage
Regulator
TST
PCK0-PCK2
PMC
JTAG & Serial Wire
OSC
3-20 MHz
XIN
XOUT
WDT
RC OSC
12/8/4 MHz
SM
SUPC
XIN32
XOUT32
OSC 32k
ERASE
RC 32k
In-Circuit Emulator
24-bit
N
SysTick Counter
V
Cortex-M3 Processor
I
Fmax 48 MHz
C
I/D
FLASH
SRAM
256 KBytes
128 KBytes
64 KBytes
24 KBytes
16 KBytes
8 KBytes
ROM
16 KBytes
S
3- layer AHB Bus Matrix Fmax 48 MHz
PLL
RTT
RTC
POR
VDDIO
RSTC
Peripheral
Bridge
NRST
PIOA
PIOB
PIOC
VDDCORE
URXD0
UTXD0
UART0
URXD1
UTXD1
UART1
RXD0
TXD0
SCK0
RTS0
CTS0
RXD1
TXD1
SCK1
RTS1
CTS1
PDC
USART0
Timer Counter A
TCLK[0:2]
TC[0..2]
TIOA[0:2]
TIOB[0:2]
Timer Counter B
TCLK[3:5]
TC[3..5]
TIOA[3:5]
TIOB[3:5]
PDC
USART1
PDC
PWM[0:3]
PWM
ADTRG
AD[0..15]
10-bit ADC
PDC
SPI
NPCS0
NPCS1
NPCS2
NPCS3
MISO
MOS
SPCK
TWI0
TWCK0
TWD0
TWI1
TWCK1
TWD1
PDC
ADVREF
DAC0
10-bit DAC
DATRG
4
PDC
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
System Controller
UT
VD
DO
JT
AG
VD
DI
N
SE
L
SAM3N 64-pin version Block Diagram
TD
TDI
O
TM /TR
S A
TC /SW CE
K/ D SW
SW IO O
CL
K
Figure 2-2.
Voltage
Regulator
TST
PCK0-PCK2
PMC
JTAG & Serial Wire
OSC
3-20 MHz
XIN
XOUT
WDT
RC OSC
12/8/4 MHz
SM
SUPC
XIN32
XOUT32
OSC 32k
ERASE
RC 32k
In-Circuit Emulator
24-bit
N
SysTick Counter
V
Cortex-M3 Processor
I
Fmax 48 MHz
C
I/D
FLASH
SRAM
256 KBytes
128 KBytes
64 KBytes
24 KBytes
16 KBytes
8 KBytes
ROM
16 KBytes
S
3-layer
Matrix
48 MHz
3- AHB
layerBus
AHB
BusFmax
Matrix
Fmax 48 MHz
PLL
RTT
RTC
POR
VDDIO
RSTC
Peripheral
Bridge
NRST
PIOA
PIOB
VDDCORE
URXD0
UTXD0
UART0
URXD1
UTXD1
UART1
RXD0
TXD0
SCK0
RTS0
CTS0
RXD1
TXD1
SCK1
RTS1
CTS1
PDC
Timer Counter A
TC[0..2]
USART0
TCLK[0:2]
TIOA[0:2]
TIOB[0:2]
Timer Counter B
PDC
TC[3..5]
USART1
PDC
PWM[0:3]
PWM
ADTRG
AD[0..9]
10-bit ADC
PDC
SPI
NPCS0
NPCS1
NPCS2
NPCS3
MISO
MOS
SPCK
TWI0
TWCK0
TWD0
TWI1
TWCK1
TWD1
PDC
ADVREF
DAC0
DATRG
10-bit DAC
PDC
5
11011BS–ATARM–22-Feb-12
System Controller
UT
VD
DO
VD
DI
N
JT
AG
SE
L
SAM3N 48-pin version Block Diagramz
TD
TD I
O
TM /TR
S A
TC /SW CE
K/ D SW
SW IO O
CL
K
Figure 2-3.
Voltage
Regulator
TST
PCK0-PCK2
PMC
JTAG & Serial Wire
OSC
3-20 MHz
XIN
XOUT
WDT
RC OSC
12/8/4 MHz
SM
SUPC
XIN32
XOUT32
OSC 32k
ERASE
RC 32k
In-Circuit Emulator
24-bit
N
SysTick Counter
V
Cortex-M3 Processor
I
Fmax 48 MHz
C
I/D
FLASH
256 KBytes
128 KBytes
64 KBytes
32 KBytes
16 KBytes
SRAM
24 KBytes
16 KBytes
8 KBytes
4 KBytes
ROM
16 KBytes
S
3-layer
Matrix
48 Fmax
MHz 48 MHz
3- AHB
layerBus
AHB
BusFmax
Matrix
PLL
RTT
RTC
POR
VDDIO
RSTC
Peripheral
Bridge
NRST
PIOA
PIOB
VDDCORE
URXD0
UTXD0
UART0
URXD1
UTXD1
UART1
RXD0
TXD0
SCK0
RTS0
CTS0
USART0
PDC
Timer Counter A
TC[0..1]
TC[3..5]
PDC
PWM
ADTRG
AD[0..7]
10-bit ADC
PDC
ADVREF
6
TIOA[0..1]
TIOB[0..1]
Timer Counter B
PDC
PWM[0:3]
TCLK[0..1]
SPI
NPCS0
NPCS1
NPCS2
NPCS3
MISO
MOS
SPCK
TWI0
TWCK0
TWD0
TWI1
TWCK1
TWD1
PDC
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
3. Signal Description
Table 3-1 gives details on the signal name classified by peripheral.
Table 3-1.
Signal Description List
Signal Name
Function
Type
Active
Level
Voltage
Reference
Comments
Power Supplies
VDDIO
Peripherals I/O Lines Power Supply
Power
1.62V to 3.6V
VDDIN
Voltage Regulator, ADC and DAC Power
Supply
Power
1.8V to 3.6V(3)
VDDOUT
Voltage Regulator Output
Power
1.8V Output
VDDPLL
Oscillator and PLL Power Supply
Power
1.65 V to 1.95V
VDDCORE
Power the core, the embedded memories
and the peripherals
Power
1.65V to 1.95V
Connected externally
to VDDOUT
GND
Ground
Ground
Clocks, Oscillators and PLLs
XIN
Main Oscillator Input
XOUT
Main Oscillator Output
XIN32
Slow Clock Oscillator Input
XOUT32
Slow Clock Oscillator Output
Input
Reset State:
- PIO Input
- Internal Pull-up
disabled
- Schmitt Trigger
enabled(1)
Output
Input
Output
VDDIO
PCK0 - PCK2
Programmable Clock Output
Output
Reset State:
- PIO Input
- Internal Pull-up
enabled
- Schmitt Trigger
enabled(1)
ICE and JTAG
TCK/SWCLK
Test Clock/Serial Wire Clock
Input
TDI
Test Data In
Input
TDO/TRACESWO
Test Data Out/Trace Asynchronous Data
Out
TMS/SWDIO
Test Mode Select /Serial Wire
Input/Output
JTAGSEL
JTAG Selection
Output
VDDIO
Input / I/O
Input
High
Reset State:
- SWJ-DP Mode
- Internal pull-up
disabled
- Schmitt Trigger
enabled(1)
Permanent Internal
pull-down
7
11011BS–ATARM–22-Feb-12
Table 3-1.
Signal Name
Signal Description List (Continued)
Function
Active
Level
Type
Voltage
Reference
Comments
Flash Memory
Flash and NVM Configuration Bits Erase
Command
ERASE
Input
High
VDDIO
Reset State:
- Erase Input
- Internal pull-down
enabled
- Schmitt Trigger
enabled(1)
Reset/Test
NRST
Microcontroller Reset
TST
Test Mode Select
I/O
Low
Input
VDDIO
Permanent Internal
pull-up
VDDIO
Permanent Internal
pull-down
VDDIO
Reset State:
- PIO or System
IOs(2)
- Internal pull-up
enabled
- Schmitt Trigger
enabled(1)
Universal Asynchronous Receiver Transceiver - UARTx
URXDx
UART Receive Data
Input
UTXDx
UART Transmit Data
Output
PIO Controller - PIOA - PIOB - PIOC
PA0 - PA31
Parallel IO Controller A
I/O
PB0 - PB14
Parallel IO Controller B
I/O
PC0 - PC31
Parallel IO Controller C
I/O
Universal Synchronous Asynchronous Receiver Transmitter USARTx
SCKx
USARTx Serial Clock
I/O
TXDx
USARTx Transmit Data
I/O
RXDx
USARTx Receive Data
Input
RTSx
USARTx Request To Send
CTSx
USARTx Clear To Send
Output
Input
Timer/Counter - TC
TCLKx
TC Channel x External Clock Input
Input
TIOAx
TC Channel x I/O Line A
I/O
TIOBx
TC Channel x I/O Line B
I/O
Pulse Width Modulation Controller- PWMC
PWMx
8
PWM Waveform Output for channel x
Output
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Table 3-1.
Signal Description List (Continued)
Signal Name
Function
Type
Active
Level
Voltage
Reference
Comments
Serial Peripheral Interface - SPI
MISO
Master In Slave Out
I/O
MOSI
Master Out Slave In
I/O
SPCK
SPI Serial Clock
I/O
SPI_NPCS0
SPI Peripheral Chip Select 0
I/O
Low
SPI_NPCS1 SPI_NPCS3
SPI Peripheral Chip Select
Output
Low
Two-Wire Interface- TWIx
TWDx
TWIx Two-wire Serial Data
I/O
TWCKx
TWIx Two-wire Serial Clock
I/O
Analog
ADVREF
ADC and DAC Reference
Analog
10-bit Analog-to-Digital Converter - ADC
AD0 - AD15
Analog Inputs
ADTRG
ADC Trigger
Analog
Input
VDDIO
Digital-to-Analog Converter Controller- DACC
DAC0
DACC channel analog output
DATRG
DACC Trigger
Analog
Input
VDDIO
Fast Flash Programming Interface
PGMEN0-PGMEN2
Programming Enabling
Input
PGMM0-PGMM3
Programming Mode
Input
PGMD0-PGMD15
Programming Data
I/O
PGMRDY
Programming Ready
Output
High
PGMNVALID
Data Direction
Output
Low
PGMNOE
Programming Read
Input
Low
PGMCK
Programming Clock
Input
PGMNCMD
Programming Command
Input
VDDIO
Notes:
Low
1. Schmitt Triggers can be disabled through PIO registers.
2. Some PIO lines are shared with System IOs.
3. See Section 5.3 “Typical Powering Schematics” for restriction on voltage range of Analog Cells.
9
11011BS–ATARM–22-Feb-12
4. Package and Pinout
SAM3N4/2/1/0/00 series is pin-to-pin compatible with SAM3S products. Furthermore
SAM3N4/2/1/0/00 devices have new functionalities referenced in italic inTable 4-1, Table 4-3
and Table 4-4.
4.1
4.1.1
SAM3N4/2/1/0/00C Package and Pinout
100-lead LQFP Package Outline
Figure 4-1.
Orientation of the 100-lead LQFP Package
75
51
76
50
100
26
1
4.1.2
25
100-ball TFBGA Package Outline
The 100-Ball TFBGA package has a 0.8 mm ball pitch and respects Green Standards. Its
dimensions are 9 x 9 x 1.1 mm.
Figure 4-2.
Orientation of the 100-ball TFBGA Package
TOP VIEW
10
9
8
7
6
5
4
3
2
1
A B C D E F G H J K
BALL A1
10
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
4.1.3
100-Lead LQFP Pinout
Table 4-1.
100-lead LQFP SAM3N4/2/1/0/00C Pinout
1
ADVREF
26
GND
51
TDI/PB4
76
TDO/TRACESWO/PB5
2
GND
27
VDDIO
52
PA6/PGMNOE
77
JTAGSEL
3
PB0/AD4
28
PA16/PGMD4
53
PA5/PGMRDY
78
PC18
4
PC29/AD13
29
PC7
54
PC28
79
TMS/SWDIO/PB6
5
PB1/AD5
30
PA15/PGMD3
55
PA4/PGMNCMD
80
PC19
6
PC30/AD14
31
PA14/PGMD2
56
VDDCORE
81
PA31
7
PB2/AD6
32
PC6
57
PA27
82
PC20
8
PC31/AD15
33
PA13/PGMD1
58
PC8
83
TCK/SWCLK/PB7
9
PB3/AD7
34
PA24
59
PA28
84
PC21
10
VDDIN
35
PC5
60
NRST
85
VDDCORE
11
VDDOUT
36
VDDCORE
61
TST
86
PC22
12
PA17/PGMD5/AD0
37
PC4
62
PC9
87
ERASE/PB12
13
PC26
38
PA25
63
PA29
88
PB10
14
PA18/PGMD6/AD1
39
PA26
64
PA30
89
PB11
15
PA21/AD8
40
PC3
65
PC10
90
PC23
16
VDDCORE
41
PA12/PGMD0
66
PA3
91
VDDIO
17
PC27
42
PA11/PGMM3
67
PA2/PGMEN2
92
PC24
18
PA19/PGMD7/AD2
43
PC2
68
PC11
93
PB13/DAC0
19
PC15/AD11
44
PA10/PGMM2
69
VDDIO
94
PC25
20
PA22/AD9
45
GND
70
GND
95
GND
21
PC13/AD10
46
PA9/PGMM1
71
PC14
96
PB8/XOUT
22
PA23
47
PC1
72
PA1/PGMEN1
97
PB9/PGMCK/XIN
23
PC12/AD12
48
PA8/XOUT32/
PGMM0
73
PC16
98
VDDIO
24
PA20/AD3
49
PA7/XIN32/
PGMNVALID
74
PA0/PGMEN0
99
PB14
25
PC0
50
VDDIO
75
PC17
100
VDDPLL
11
11011BS–ATARM–22-Feb-12
4.1.4
100-ball TFBGA Pinout
Table 4-2.
100-ball TFBGA SAM3N4/2/1/0/00C Pinout
A1
PB1
C6
PB7
F1
PA18
H6
PC4
A2
PC29
C7
PC16
F2
PC26
H7
PA11
A3
VDDIO
C8
PA1
F3
VDDOUT
H8
PC1
A4
PB9
C9
PC17
F4
GND
H9
PA6
A5
PB8
C10
PA0
F5
VDDIO
H10
PB4
A6
PB13
D1
PB3
F6
PA27
J1
PC15
A7
PB11
D2
PB0
F7
PC8
J2
PC0
A8
PB10
D3
PC24
F8
PA28
J3
PA16
A9
PB6
D4
PC22
F9
TST
J4
PC6
A10
JTAGSEL
D5
GND
F10
PC9
J5
PA24
B1
PC30
D6
GND
G1
PA21
J6
PA25
B2
ADVREF
D7
VDDCORE
G2
PC27
J7
PA10
B3
GNDANA
D8
PA2
G3
PA15
J8
GND
B4
PB14
D9
PC11
G4
VDDCORE
J9
VDDCORE
B5
PC21
D10
PC14
G5
VDDCORE
J10
VDDIO
B6
PC20
E1
PA17
G6
PA26
K1
PA22
B7
PA31
E2
PC31
G7
PA12
K2
PC13
B8
PC19
E3
VDDIN
G8
PC28
K3
PC12
B9
PC18
E4
GND
G9
PA4
K4
PA20
B10
PB5
E5
GND
G10
PA5
K5
PC5
C1
PB2
E6
NRST
H1
PA19
K6
PC3
C2
VDDPLL
E7
PA29
H2
PA23
K7
PC2
C3
PC25
E8
PA30
H3
PC7
K8
PA9
C4
PC23
E9
PC10
H4
PA14
K9
PA8
C5
PB12
E10
PA3
H5
PA13
K10
PA7
12
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
4.2
SAM3N4/2/1/0/00B Package and Pinout
Figure 4-3.
Orientation of the 64-pad QFN Package
64
49
1
48
16
33
32
17
Figure 4-4.
TOP VIEW
Orientation of the 64-lead LQFP Package
48
33
49
32
64
17
1
16
13
11011BS–ATARM–22-Feb-12
4.2.1
64-Lead LQFP and QFN Pinout
64-pin version SAM3N devices are pin-to-pin compatible with SAM3S products. Furthermore,
SAM3N products have new functionalities shown in italic in Table 4-3.
Table 4-3.
64-pin SAM3N4/2/1/0/00B Pinout
1
ADVREF
17
GND
33
TDI/PB4
49
TDO/TRACESWO/PB5
2
GND
18
VDDIO
34
PA6/PGMNOE
50
JTAGSEL
3
PB0/AD4
19
PA16/PGMD4
35
PA5/PGMRDY
51
TMS/SWDIO/PB6
4
PB1AD5
20
PA15/PGMD3
36
PA4/PGMNCMD
52
PA31
5
PB2/AD6
21
PA14/PGMD2
37
PA27/PGMD15
53
TCK/SWCLK/PB7
6
PB3/AD7
22
PA13/PGMD1
38
PA28
54
VDDCORE
7
VDDIN
23
PA24/PGMD12
39
NRST
55
ERASE/PB12
8
VDDOUT
24
VDDCORE
40
TST
56
PB10
9
PA17/PGMD5/AD0
25
PA25/PGMD13
41
PA29
57
PB11
10
PA18/PGMD6/AD1
26
PA26/PGMD14
42
PA30
58
VDDIO
11
PA21/PGMD9/AD8
27
PA12/PGMD0
43
PA3
59
PB13/DAC0
12
VDDCORE
28
PA11/PGMM3
44
PA2/PGMEN2
60
GND
13
PA19/PGMD7/AD2
29
PA10/PGMM2
45
VDDIO
61
XOUT/PB8
14
PA22/PGMD10/AD9
30
PA9/PGMM1
46
GND
62
XIN/PGMCK/PB9
15
PA23/PGMD11
31
PA8/XOUT32/PGMM
0
47
PA1/PGMEN1
63
PB14
16
PA20/PGMD8/AD3
32
PA7/XIN32/XOUT32/
PGMNVALID
48
PA0/PGMEN0
64
VDDPLL
Note:
14
The bottom pad of the QFN package must be connected to ground.
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
4.3
SAM3N4/2/1/0/00A Package and Pinout
Figure 4-5.
Orientation of the 48-pad QFN Package
48
37
1
36
12
25
13
24
TOP VIEW
Figure 4-6.
Orientation of the 48-lead LQFP Package
36
25
37
24
48
13
1
12
15
11011BS–ATARM–22-Feb-12
4.3.1
48-Lead LQFP and QFN Pinout
Table 4-4.
48-pin SAM3N4/2/1/0/00A Pinout
1
ADVREF
13
VDDIO
25
TDI/PB4
37
TDO/TRACESWO/
PB5
2
GND
14
PA16/PGMD4
26
PA6/PGMNOE
38
JTAGSEL
3
PB0/AD4
15
PA15/PGMD3
27
PA5/PGMRDY
39
TMS/SWDIO/PB6
4
PB1/AD5
16
PA14/PGMD2
28
PA4/PGMNCMD
40
TCK/SWCLK/PB7
5
PB2/AD6
17
PA13/PGMD1
29
NRST
41
VDDCORE
6
PB3/AD7
18
VDDCORE
30
TST
42
ERASE/PB12
7
VDDIN
19
PA12/PGMD0
31
PA3
43
PB10
8
VDDOUT
20
PA11/PGMM3
32
PA2/PGMEN2
44
PB11
9
PA17/PGMD5/AD0
21
PA10/PGMM2
33
VDDIO
45
XOUT/PB8
10
PA18/PGMD6/AD1
22
PA9/PGMM1
34
GND
46
XIN/P/PB9/GMCK
11
PA19/PGMD7/AD2
23
PA8/XOUT32/PG
MM0
35
PA1/PGMEN1
47
VDDIO
12
PA20/AD3
24
PA7/XIN32/PGMN
VALID
36
PA0/PGMEN0
48
VDDPLL
Note:
16
The bottom pad of the QFN package must be connected to ground.
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
5. Power Considerations
5.1
Power Supplies
The SAM3N product has several types of power supply pins:
• VDDCORE pins: Power the core, including the processor, the embedded memories and the
peripherals. Voltage ranges from 1.62V and 1.95V.
• VDDIO pins: Power the Peripherals I/O lines, Backup part, 32 kHz crystal oscillator and
oscillator pads. Voltage ranges from 1.62V and 3.6V
• VDDIN pin: Voltage Regulator, ADC and DAC Power Supply. Voltage ranges from 1.8V to
3.6V for the Voltage Regulator
• VDDPLL pin: Powers the PLL, the Fast RC and the 3 to 20 MHz oscillators. Voltage ranges
from 1.62V and 1.95V.
5.2
Voltage Regulator
The SAM3N embeds a voltage regulator that is managed by the Supply Controller.
This internal regulator is intended to supply the internal core of SAM3N. It features two different
operating modes:
• In Normal mode, the voltage regulator consumes less than 700 µA static current and draws
60 mA of output current. Internal adaptive biasing adjusts the regulator quiescent current
depending on the required load current. In Wait Mode quiescent current is only 7 µA.
• In Backup mode, the voltage regulator consumes less than 1 µA while its output (VDDOUT)
is driven internally to GND. The default output voltage is 1.80V and the start-up time to reach
Normal mode is less than100 µs.
For adequate input and output power supply decoupling/bypassing, refer to the Voltage Regulator section in the Electrical Characteristics section of the datasheet.
5.3
Typical Powering Schematics
The SAM3N supports a 1.62V-3.6V single supply mode. The internal regulator input connected
to the source and its output feeds VDDCORE. Figure 5-1 shows the power schematics.
As VDDIN powers the voltage regulator and the ADC/DAC, when the user does not want to use
the embedded voltage regulator, it can be disabled by software via the SUPC (note that it is different from Backup mode).
17
11011BS–ATARM–22-Feb-12
Figure 5-1.
Single Supply
VDDIO
I/Os.
Main Supply
(1.8V-3.6V)
ADC, DAC
VDDIN
VDDOUT
Voltage
Regulator
VDDCORE
VDDPLL
Figure 5-2.
Core Externally Supplied
Main Supply
(1.62V-3.6V)
VDDIO
I/Os.
Can be the
same supply
ADC, DAC Supply
(3V-3.6V)
ADC, DAC
VDDIN
VDDOUT
VDDCORE Supply
(1.62V-1.95V)
Voltage
Regulator
VDDCORE
VDDPLL
Note:
Restrictions
With Main Supply < 3V, ADC and DAC are not usable.
With Main Supply >= 3V, all peripherals are usable.
Figure 5-3 below provides an example of the powering scheme when using a backup battery.
Since the PIO state is preserved when in backup mode, any free PIO line can be used to switch
off the external regulator by driving the PIO line at low level (PIO is input, pull-up enabled after
backup reset). External wake-up of the system can be from a push button or any signal. See
Section 5.6 “Wake-up Sources” for further details.TFBGA
18
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Figure 5-3.
Core Externally Supplied (backup battery)
ADC, DAC Supply
(3V-3.6V)
Backup
Battery
VDDIO
I/Os.
+
ADC, DAC
VDDIN
Main Supply
IN
OUT
3.3V
LDO
VDDOUT
Voltage
Regulator
VDDCORE
ON/OFF
VDDPLL
PIOx (Output)
WAKEUPx
External wakeup signal
Note: The two diodes provide a “switchover circuit” (for illustration purpose)
between the backup battery and the main supply when the system is put in
backup mode.
5.4
Active Mode
Active mode is the normal running mode with the core clock running from the fast RC oscillator,
the main crystal oscillator or the PLL. The power management controller can be used to adapt
the frequency and to disable the peripheral clocks.
5.5
Low Power Modes
The various low-power modes of the SAM3N are described below:
5.5.1
Backup Mode
The purpose of backup mode is to achieve the lowest power consumption possible in a system
that is performing periodic wakeups to carry out tasks but not requiring fast startup time
(<0.1ms). Total current consumption is 3 µA typical.
The Supply Controller, zero-power power-on reset, RTT, RTC, Backup registers and 32 kHz
oscillator (RC or crystal oscillator selected by software in the Supply Controller) are running. The
regulator and the core supply are off.
Backup mode is based on the Cortex-M3 deep sleep mode with the voltage regulator disabled.
The SAM3N can be awakened from this mode through WUP0-15 pins, the supply monitor (SM),
the RTT or RTC wake-up event.
Backup mode is entered by using WFE instructions with the SLEEPDEEP bit in the System Control Register of the Cortex-M3 set to 1. (See the Power management description in The ARM
Cortex M3 Processor section of the product datasheet).
Exit from Backup mode happens if one of the following enable wake-up events occurs:
• WKUPEN0-15 pins (level transition, configurable debouncing)
19
11011BS–ATARM–22-Feb-12
• Supply Monitor alarm
• RTC alarm
• RTT alarm
5.5.2
Wait Mode
The purpose of the wait mode is to achieve very low power consumption while maintaining the
whole device in a powered state for a startup time of less than 10 µs. Current Consumption in
Wait mode is typically 15 µA (total current consumption) if the internal voltage regulator is used
or 8 µA if an external regulator is used.
In this mode, the clocks of the core, peripherals and memories are stopped. However, the core,
peripherals and memories power supplies are still powered. From this mode, a fast start up is
available.
This mode is entered via Wait for Event (WFE) instructions with LPM = 1 (Low Power Mode bit in
PMC_FSMR). The Cortex-M3 is able to handle external or internal events in order to wake up
the core (WFE). By configuring the WUP0-15 external lines as fast startup wake-up pins (refer to
Section 5.7 “Fast Start-Up”). RTC or RTT Alarm wake-up events can be used to wake up the
CPU (exit from WFE).
Entering Wait Mode:
• Select the 4/8/12 MHz fast RC oscillator as Main Clock
• Set the LPM bit in the PMC Fast Startup Mode Register (PMC_FSMR)
• Execute the Wait-For-Event (WFE) instruction of the processor
Note:
5.5.3
Internal Main clock resynchronization cycles are necessary between the writing of MOSCRCEN
bit and the effective entry in Wait mode. Depending on the user application, Waiting for
MOSCRCEN bit to be cleared is recommended to ensure that the core will not execute undesired
instructions.
Sleep Mode
The purpose of sleep mode is to optimize power consumption of the device versus response
time. In this mode, only the core clock is stopped. The peripheral clocks can be enabled. The
current consumption in this mode is application dependent.
This mode is entered via Wait for Interrupt (WFI) or Wait for Event (WFE) instructions with
LPM = 0 in PMC_FSMR.
The processor can be woke up from an interrupt if WFI instruction of the Cortex M3 is used, or
from an event if the WFE instruction is used to enter this mode.
20
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
5.5.4
Low Power Mode Summary Table
The modes detailed above are the main low power modes. Each part can be set to on or off separately and wake up sources can be individually configured. Table 5-1 below shows a summary
of the configurations of the low power modes.
Table 5-1.
Mode
Backup
Mode
Low Power Mode Configuration Summary
SUPC,
32 kHz
Oscillator
RTC RTT
Backup
Registers,
Core
POR
Memory
(Backup
Region)
Regulator Peripherals
Mode Entry
PIO State
Potential Wake Up Core at while in Low PIO State Consumption Wake Up
(2) (3)
Sources
Wake Up Power Mode at Wake Up
Time(1)
Previous
state saved
PIOA &
PIOB &
PIOC
Inputs with
pull ups
ON
Any Event from: Fast
startup through
Powered
Clocked
+SLEEPDEEP
WUP0-15 pins
back
bit
=
0
(Not clocked)
RTC alarm
+LPM bit = 1 RTT alarm
Previous
state saved
Unchanged 5 µA/15 µA (5) < 10 µs
ON
Entry mode = WFI
Interrupt Only; Entry
mode = WFE Any
WFE or WFI Enabled Interrupt
Powered(7) +SLEEPDEEP and/or Any Event
Clocked
from: Fast start-up back
bit = 0
(Not clocked)
+LPM bit = 0 through WUP0-15
pins
RTC alarm
RTT alarm
Previous
state saved
Unchanged
OFF
WUP0-15 pins
OFF
BOD alarm
+SLEEPDEEP RTC alarm
(Not powered)
bit = 1
RTT alarm
WFE
ON
Reset
3 µA typ(4)
< 0.1 ms
WFE
Wait
Mode
Sleep
Mode
Notes:
ON
ON
(6)
(6)
1. When considering wake-up time, the time required to start the PLL is not taken into account. Once started, the device works
with the 4/8/12 MHz Fast RC oscillator. The user has to add the PLL start-up time if it is needed in the system. The wake-up
time is defined as the time taken for wake up until the first instruction is fetched.
2. The external loads on PIOs are not taken into account in the calculation.
3. Supply Monitor current consumption is not included.
4. Total Current consumption.
5. 5 µA on VDDCORE, 15 µA for total current consumption (using internal voltage regulator), 8 µA for total current consumption
(without using internal voltage regulator).
6. Depends on MCK frequency.
7. In this mode the core is supplied and not clocked but some peripherals can be clocked.
21
11011BS–ATARM–22-Feb-12
5.6
Wake-up Sources
The wake-up events allow the device to exit backup mode. When a wake-up event is detected,
the Supply Controller performs a sequence which automatically reenables the core power supply and the SRAM power supply, if they are not already enabled.
Figure 5-4.
Wake-up Source
BODEN
brown_out
RTCEN
rtc_alarm
Core
Supply
Restart
RTTEN
rtt_alarm
WKUPT0
WKUP0
22
WKUPDBC
WKUPEN1
WKUPIS1
SLCK
WKUPS
Debouncer
Falling/Rising
Edge
Detector
WKUPT15
WKUP15
WKUPIS0
Falling/Rising
Edge
Detector
WKUPT1
WKUP1
WKUPEN0
WKUPEN15
WKUPIS15
Falling/Rising
Edge
Detector
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
5.7
Fast Start-Up
The SAM3N allows the processor to restart in a few microseconds while the processor is in wait
mode. A fast start up can occur upon detection of a low level on one of the 19 wake-up inputs
(WKUP0 to 15 + SM + RTC + RTT).
The fast restart circuitry, as shown in Figure 5-5, is fully asynchronous and provides a fast startup signal to the Power Management Controller. As soon as the fast start-up signal is asserted,
the PMC automatically restarts the embedded 4 MHz fast RC oscillator, switches the master
clock on this 4 MHz clock and reenables the processor clock.
Figure 5-5.
Fast Start-Up Sources
RTCEN
rtc_alarm
RTTEN
rtt_alarm
FSTT0
WKUP0
fast_restart
Falling/Rising
Edge
Detector
FSTT15
WKUP15
Falling/Rising
Edge
Detector
23
11011BS–ATARM–22-Feb-12
6. Input/Output Lines
The SAM3N has several kinds of input/output (I/O) lines such as general purpose I/Os (GPIO)
and system I/Os. GPIOs can have alternate functionality due to multiplexing capabilities of the
PIO controllers. The same PIO line can be used whether in IO mode or by the multiplexed
peripheral. System I/Os include pins such as test pins, oscillators, erase or analog inputs.
6.1
General Purpose I/O Lines
GPIO Lines are managed by PIO Controllers. All I/Os have several input or output modes such
as pull-up or pull-down, input Schmitt triggers, multi-drive (open-drain), glitch filters, debouncing
or input change interrupt. Programming of these modes is performed independently for each I/O
line through the PIO controller user interface. For more details, refer to the product PIO controller section.
The input output buffers of the PIO lines are supplied through VDDIO power supply rail.
The SAM3N embeds high speed pads able to handle up to 45 MHz for SPI clock lines and 35
MHz on other lines. See AC Characteristics Section in the Electrical Characteristics Section of
the datasheet for more details. Typical pull-up and pull-down value is 100 kΩ for all I/Os.
Each I/O line also embeds an ODT (On-Die Termination), (see Figure 6-1). It consists of an
internal series resistor termination scheme for impedance matching between the driver output
(SAM3N) and the PCB trace impedance preventing signal reflection. The series resistor helps to
reduce I/O switching current (di/dt) thereby reducing in turn, EMI. It also decreases overshoot
and undershoot (ringing) due to inductance of interconnect between devices or between boards.
In conclusion ODT helps diminish signal integrity issues.
Figure 6-1.
On-Die Termination
Z0 ~ Zout + Rodt
ODT
36 Ohms Typ.
Rodt
Receiver
SAM3 Driver with
Zout ~ 10 Ohms
6.2
PCB Trace
Z0 ~ 50 Ohms
System I/O Lines
System I/O lines are pins used by oscillators, test mode, reset and JTAG to name but a few.
Described below are the SAM3N system I/O lines shared with PIO lines:
These pins are software configurable as general purpose I/O or system pins. At startup the
default function of these pins is always used.
24
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Table 6-1.
System I/O Configuration Pin List.
SYSTEM_IO
bit number
Default function
after reset
Other function
12
ERASE
PB12
Low Level at
startup(1)
7
TCK/SWCLK
PB7
-
6
TMS/SWDIO
PB6
-
5
TDO/TRACESWO
PB5
-
4
TDI
PB4
-
-
PA7
XIN32
-
-
PA8
XOUT32
-
-
PB9
XIN
-
-
PB8
XOUT
-
Notes:
Constraints for
normal start
Configuration
In Matrix User Interface Registers
(Refer to the System I/O
Configuration Register in the Bus
Matrix section of the product
datasheet.)
See footnote (2) below
See footnote (3) below
1. If PB12 is used as PIO input in user applications, a low level must be ensured at startup to prevent Flash erase before the
user application sets PB12 into PIO mode.
2. In the product Datasheet Refer to: Slow Clock Generator of the Supply Controller section.
3. In the product Datasheet Refer to: 3 to 20 MHZ Crystal Oscillator information in the PMC section.
6.2.1
Serial Wire JTAG Debug Port (SWJ-DP) Pins
The SWJ-DP pins are TCK/SWCLK, TMS/SWDIO, TDO/SWO, TDI and commonly provided on
a standard 20-pin JTAG connector defined by ARM. For more details about voltage reference
and reset state, refer to Table 3-1 on page 7.
At startup, SWJ-DP pins are configured in SWJ-DP mode to allow connection with debugging
probe. Please refer to the Debug and Test Section of the product datasheet.
SWJ-DP pins can be used as standard I/Os to provide users more general input/output pins
when the debug port is not needed in the end application. Mode selection between SWJ-DP
mode (System IO mode) and general IO mode is performed through the AHB Matrix Special
Function Registers (MATRIX_SFR). Configuration of the pad for pull-up, triggers, debouncing
and glitch filters is possible regardless of the mode.
The JTAGSEL pin is used to select the JTAG boundary scan when asserted at a high level. It
integrates a permanent pull-down resistor of about 15 kΩ to GND, so that it can be left unconnected for normal operations.
By default, the JTAG Debug Port is active. If the debugger host wants to switch to the Serial
Wire Debug Port, it must provide a dedicated JTAG sequence on TMS/SWDIO and
TCK/SWCLK which disables the JTAG-DP and enables the SW-DP. When the Serial Wire
Debug Port is active, TDO/TRACESWO can be used for trace.
The asynchronous TRACE output (TRACESWO) is multiplexed with TDO. So the asynchronous
trace can only be used with SW-DP, not JTAG-DP. For more information about SW-DP and
JTAG-DP switching, please refer to the Debug and Test Section.
25
11011BS–ATARM–22-Feb-12
6.3
Test Pin
The TST pin is used for JTAG Boundary Scan Manufacturing Test or Fast Flash programming
mode of the SAM3N series. The TST pin integrates a permanent pull-down resistor of about 15
kΩ to GND, so that it can be left unconnected for normal operations. To enter fast programming
mode, see the Fast Flash Programming Interface (FFPI) section. For more on the manufacturing
and test mode, refer to the “Debug and Test” section of the product datasheet.
6.4
NRST Pin
The NRST pin is bidirectional. It is handled by the on-chip reset controller and can be driven low
to provide a reset signal to the external components or asserted low externally to reset the
microcontroller. It will reset the Core and the peripherals except the Backup region (RTC, RTT
and Supply Controller). There is no constraint on the length of the reset pulse and the reset controller can guarantee a minimum pulse length. The NRST pin integrates a permanent pull-up
resistor to VDDIO of about 100 kΩ . By default, the NRST pin is configured as an input.
6.5
ERASE Pin
The ERASE pin is used to reinitialize the Flash content (and some of its NVM bits) to an erased
state (all bits read as logic level 1). It integrates a pull-down resistor of about 100 kΩ to GND, so
that it can be left unconnected for normal operations.
This pin is debounced by SCLK to improve the glitch tolerance. When the ERASE pin is tied high
during less than 100 ms, it is not taken into account. The pin must be tied high during more than
220 ms to perform a Flash erase operation.
The ERASE pin is a system I/O pin and can be used as a standard I/O. At startup, the ERASE
pin is not configured as a PIO pin. If the ERASE pin is used as a standard I/O, startup level of
this pin must be low to prevent unwanted erasing. Please refer to Section 11.2 “Peripheral Signals Multiplexing on I/O Lines” on page 42. Also, if the ERASE pin is used as a standard I/O
output, asserting the pin to low does not erase the Flash.
26
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
7. Processor and Architecture
7.1
ARM Cortex-M3 Processor
• Version 2.0
• Thumb-2 (ISA) subset consisting of all base Thumb-2 instructions, 16-bit and 32-bit.
• Harvard processor architecture enabling simultaneous instruction fetch with data load/store.
• Three-stage pipeline.
• Single cycle 32-bit multiply.
• Hardware divide.
• Thumb and Debug states.
• Handler and Thread modes.
• Low latency ISR entry and exit.
7.2
APB/AHB Bridge
The SAM3N4/2/1/0/00 product embeds one peripheral bridge:
The peripherals of the bridge are clocked by MCK.
7.3
Matrix Masters
The Bus Matrix of the SAM3N product manages 3 masters, which means that each master can
perform an access concurrently with others, to an available slave.
Each master has its own decoder, which is defined specifically for each master. In order to simplify the addressing, all the masters have the same decodings.
Table 7-1.
7.4
List of Bus Matrix Masters
Master 0
Cortex-M3 Instruction/Data
Master 1
Cortex-M3 System
Master 2
Peripheral DMA Controller (PDC)
Matrix Slaves
The Bus Matrix of the SAM3N product manages 4 slaves. Each slave has its own arbiter, allowing a different arbitration per slave.
Table 7-2.
List of Bus Matrix Slaves
Slave 0
Internal SRAM
Slave 1
Internal ROM
Slave 2
Internal Flash
Slave 3
Peripheral Bridge
27
11011BS–ATARM–22-Feb-12
7.5
Master to Slave Access
All the Masters can normally access all the Slaves. However, some paths do not make sense,
for example allowing access from the Cortex-M3 S Bus to the Internal ROM. Thus, these paths
are forbidden or simply not wired, and shown as “-” in Table 7-3.
Table 7-3.
7.6
SAM3N Master to Slave Access
Masters
0
1
2
Slaves
Cortex-M3 I/D Bus
Cortex-M3 S Bus
PDC
0
Internal SRAM
-
X
X
1
Internal ROM
X
-
X
2
Internal Flash
X
-
-
3
Peripheral Bridge
-
X
X
Peripheral DMA Controller
• Handles data transfer between peripherals and memories
• Low bus arbitration overhead
– One Master Clock cycle needed for a transfer from memory to peripheral
– Two Master Clock cycles needed for a transfer from peripheral to memory
• Next Pointer management for reducing interrupt latency requirement
The Peripheral DMA Controller handles transfer requests from the channel according to the following priorities (Low to High priorities):
Table 7-4.
28
Peripheral DMA Controller
Instance name
Channel T/R
100 & 64 Pins
48 Pins
TWI0
Transmit
x
x
UART0
Transmit
x
x
USART0
Transmit
x
x
DAC
Transmit
x
N/A
SPI
Transmit
x
x
TWI0
Receive
x
x
UART0
Receive
x
x
USART0
Receive
x
x
ADC
Receive
x
x
SPI
Receive
x
x
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
7.7
Debug and Test Features
• Debug access to all memory and registers in the system, including Cortex-M3 register bank
when the core is running, halted, or held in reset.
• Serial Wire Debug Port (SW-DP) and Serial Wire JTAG Debug Port (SWJ-DP) debug access
• Flash Patch and Breakpoint (FPB) unit for implementing breakpoints and code patches
• Data Watchpoint and Trace (DWT) unit for implementing watchpoints, data tracing, and
system profiling
• Instrumentation Trace Macrocell (ITM) for support of printf style debugging
• IEEE1149.1 JTAG Boundary-can on All Digital Pins
29
11011BS–ATARM–22-Feb-12
8. Product Mapping
Figure 8-1.
0x00000000
SAM3N4/2/1/0/00 Product Mapping
Code
0x00000000
Address Memory Space
Peripherals
0x40000000
Boot Memory
0x00400000
0x400E0200
1 MByte
bit band
region
0x40008000
0x20000000
0x20100000
0x400E0400
SPI
0x00C00000
0x4000C000
SRAM
PMC
21
0x400E0600
Reserved
Reserved
0x1FFFFFFF
MATRIX
Reserved
Internal Flash
Internal ROM
System Controller
Reserved
0x40004000
Code
0x00800000
0x400E0000
Reserved
0x22000000
0x40010000
Undefined
0x24000000
+0x40
32 MBytes
bit band alias
0x40000000
+0x80
0x40014000
Peripherals
+0x40
0x60000000
+0x80
Reserved
TC0
TC0
TC0
TC1
TC1
TC1
0x400E0740
TC0
TC1
TC2
TC3
TC4
TC5
0x40018000
0xA0000000
TWI0
0x4001C000
Reserved
TWI1
0x40020000
0xE0000000
PWM
0x40024000
System
USART0
0x40028000
0xFFFFFFFF
UART0
USART1
0x4002C000
0x400E0800
UART1
24
0x400E0A00
EEFC
25
0x400E0C00
PIOA
0x400E1000
PIOB
28
0x400E1200
PIOC
19
15
1 MByte
bit band
region
0x400E1400
+0x10
+0x30
+0x50
+0x60
Reserved
offset
0x40038000
block
peripheral
+0x90
ADC
ID
0x4003C000
DACC
0x40040000
29
30
6
0x400E0E00
27
14
9
Reserved
26
31
8
CHIPID
23
20
5
SYSC
SYSC
SYSC
SYSC
SYSC
SYSC
RSTC
11
12
13
1
SUPC
RTT
WDT
RTC
3
4
2
GPBR
0x400E1600
Reserved
0x4007FFFF
Reserved
0x40044000
Reserved
0x40048000
Reserved
0x400E0000
System Controller
0x400E2600
Reserved
Reserved
0x40100000
Reserved
0x40200000
0x40400000
32 MBytes
bit band alias
Reserved
0x60000000
30
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
9. Memories
9.1
9.1.1
Embedded Memories
Internal SRAM
The SAM3N4 product embeds a total of 24-Kbytes high-speed SRAM.
The SAM3N2 product embeds a total of 16-Kbytes high-speed SRAM.
The SAM3N1 product embeds a total of 8-Kbytes high-speed SRAM.
The SRAM is accessible over System Cortex-M3 bus at address 0x2000 0000.
The SRAM is in the bit band region. The bit band alias region is from 0x2200 0000 and 0x23FF
FFFF.
RAM size must be configurable by calibration fuses.
9.1.2
Internal ROM
The SAM3N product embeds an Internal ROM, which contains the SAM Boot Assistant
(SAM-BA), In Application Programming routines (IAP) and Fast Flash Programming Interface
(FFPI).
At any time, the ROM is mapped at address 0x0080 0000.
9.1.3
9.1.3.1
Embedded Flash
Flash Overview
The Flash of the SAM3N4 (256 Kbytes) is organized in one bank of 1024 pages of 256 bytes
(Single plane).
The Flash of the SAM3N2 (128 Kbytes) is organized in one bank of 512 pages of 256 bytes (Single Plane).
The Flash of the SAM3N1 (64 Kbytes) is organized in one bank of 256 pages of 256 bytes (Single plane).
The Flash contains a 128-byte write buffer, accessible through a 32-bit interface.
9.1.3.2
Flash Power Supply
The Flash is supplied by VDDCORE.
9.1.3.3
Enhanced Embedded Flash Controller
The Enhanced Embedded Flash Controller (EEFC) manages accesses performed by the masters of the system. It enables reading the Flash and writing the write buffer. It also contains a
User Interface, mapped on the APB.
The Enhanced Embedded Flash Controller ensures the interface of the Flash block with the 32bit internal bus. Its 128-bit wide memory interface increases performance.
The user can choose between high performance or lower current consumption by selecting
either 128-bit or 64-bit access. It also manages the programming, erasing, locking and unlocking
sequences of the Flash using a full set of commands.
One of the commands returns the embedded Flash descriptor definition that informs the system
about the Flash organization, thus making the software generic.
31
11011BS–ATARM–22-Feb-12
9.1.3.4
Flash Speed
The user needs to set the number of wait states depending on the frequency used.
For more details, refer to the AC Characteristics sub section in the product Electrical Characteristics Section.
9.1.3.5
Lock Regions
Several lock bits used to protect write and erase operations on lock regions. A lock region is
composed of several consecutive pages, and each lock region has its associated lock bit.
Table 9-1.
Lock bit number
Product
Number of lock bits
Lock region size
SAM3N4
16
16 kbytes (64 pages)
SAM3N2
8
16 kbytes (64 pages)
SAM3N1
4
16 kbytes (64 pages)
If a locked-region’s erase or program command occurs, the command is aborted and the EEFC
triggers an interrupt.
The lock bits are software programmable through the EEFC User Interface. The command “Set
Lock Bit” enables the protection. The command “Clear Lock Bit” unlocks the lock region.
Asserting the ERASE pin clears the lock bits, thus unlocking the entire Flash.
9.1.3.6
Security Bit Feature
The SAM3N features a security bit, based on a specific General Purpose NVM bit (GPNVM bit
0). When the security is enabled, any access to the Flash, either through the ICE interface or
through the Fast Flash Programming Interface, is forbidden. This ensures the confidentiality of
the code programmed in the Flash.
This security bit can only be enabled, through the command “Set General Purpose NVM Bit 0” of
the EEFC User Interface. Disabling the security bit can only be achieved by asserting the
ERASE pin at 1, after a full Flash erase is performed. When the security bit is deactivated, all
accesses to the Flash are permitted.
It is important to note that the assertion of the ERASE pin should always be longer than 200 ms.
As the ERASE pin integrates a permanent pull-down, it can be left unconnected during normal
operation. However, it is safer to connect it directly to GND for the final application.
9.1.3.7
Calibration Bits
NVM bits are used to calibrate the brownout detector and the voltage regulator. These bits are
factory configured and cannot be changed by the user. The ERASE pin has no effect on the calibration bits.
9.1.3.8
Unique Identifier
Each device integrates its own 128-bit unique identifier. These bits are factory configured and
cannot be changed by the user. The ERASE pin has no effect on the unique identifier.
32
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
9.1.3.9
Fast Flash Programming Interface
The Fast Flash Programming Interface allows programming the device through either a serial
JTAG interface or through a multiplexed fully-handshaked parallel port. It allows gang programming with market-standard industrial programmers.
The FFPI supports read, page program, page erase, full erase, lock, unlock and protect
commands.
The Fast Flash Programming Interface is enabled and the Fast Programming Mode is entered
when TST and PA0 and PA1are tied low.
9.1.3.10
SAM-BA Boot
The SAM-BA Boot is a default Boot Program which provides an easy way to program in-situ the
on-chip Flash memory.
The SAM-BA Boot Assistant supports serial communication via the UART0.
The SAM-BA Boot provides an interface with SAM-BA Graphic User Interface (GUI).
The SAM-BA Boot is in ROM and is mapped in Flash at address 0x0 when GPNVM bit 1 is set to 0.
9.1.3.11
GPNVM Bits
The SAM3N features three GPNVM bits that can be cleared or set respectively through the commands “Clear GPNVM Bit” and “Set GPNVM Bit” of the EEFC User Interface.
.
Table 9-2.
9.1.4
General-purpose Non volatile Memory Bits
GPNVMBit[#]
Function
0
Security bit
1
Boot mode selection
Boot Strategies
The system always boots at address 0x0. To ensure a maximum boot possibilities the memory
layout can be changed via GPNVM.
A general purpose NVM (GPNVM) bit is used to boot either on the ROM (default) or from the
Flash.
The GPNVM bit can be cleared or set respectively through the commands “Clear General-purpose NVM Bit” and “Set General-purpose NVM Bit” of the EEFC User Interface.
Setting the GPNVM Bit 1 selects the boot from the Flash, clearing it selects the boot from the
ROM. Asserting ERASE clears the GPNVM Bit 1 and thus selects the boot from the ROM by
default.
33
11011BS–ATARM–22-Feb-12
10. System Controller
The System Controller is a set of peripherals, which allow handling of key elements of the system, such as power, resets, clocks, time, interrupts, watchdog, etc...
See the System Controller block diagram in Figure 10-1 on page 35.
34
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Figure 10-1. System Controller Block Diagram
VDDIO
VDDOUT
vr_on
vr_mode
Software Controlled
Voltage Regulator
VDDIN
Supply
Controller
Zero-Power
Power-on Reset
VDDIO
bod_on
Supply
Monitor
(Backup)
PIOA/B/C
PIOx
ADC
ADx
brown_out
WKUP0 - WKUP15
General Purpose
Backup Registers
ADVREF
rtc_nreset
SLCK
RTC
SLCK
RTT
DAC
rtc_alarm
DAC0
rtt_nreset
rtt_alarm
osc32k_xtal_en
core_nreset
XIN32
XOUT32
Xtal 32 kHz
Oscillator
Embedded
32 kHz RC
Oscillator
osc32k_sel
Slow Clock
SLCK
bod_core_on
lcore_brown_out
Brownout
Detector
(Core)
osc32k_rc_en
SRAM
Backup Power Supply
core_nreset
Reset
Controller
NRST
Peripherals
proc_nreset
periph_nreset
ice_nreset
VDDCORE
Matrix
Peripheral
Bridge
Cortex-M3
FSTT0 - FSTT15
Embedded
12/8/4 MHz
RC
Oscillator
XIN
XOUT
Xtal
Oscillator
SLCK
Flash
Main Clock
MAINCK
Master Clock
MCK
Power
Management
Controller
PLL
SLCK
Watchdog
Timer
Core Power Supply
FSTT0 - FSTT15 are possible Fast Startup Sources, generated by WKUP0-WKUP15 Pins, but are not physical pins.
35
11011BS–ATARM–22-Feb-12
10.1
System Controller and Peripherals Mapping
Please refer to Figure 8-1, "SAM3N4/2/1/0/00 Product Mapping" on page 30.
All the peripherals are in the bit band region and are mapped in the bit band alias region.
10.2
Power-on-Reset, Brownout and Supply Monitor
The SAM3N embeds three features to monitor, warn and/or reset the chip:
• Power-on-Reset on VDDIO
• Brownout Detector on VDDCORE
• Supply Monitor on VDDIO
10.2.1
Power-on-Reset
The Power-on-Reset monitors VDDIO. It is always activated and monitors voltage at start up but
also during power down. If VDDIO goes below the threshold voltage, the entire chip is reset. For
more information, refer to the Electrical Characteristics section of the datasheet.
10.2.2
Brownout Detector on VDDCORE
The Brownout Detector monitors VDDCORE. It is active by default. It can be deactivated by software through the Supply Controller (SUPC_MR). It is especially recommended to disable it
during low-power modes such as wait or sleep modes.
If VDDCORE goes below the threshold voltage, the reset of the core is asserted. For more information, refer to the Supply Controller (SUPC) and Electrical Characteristics sections of the
datasheet.
10.2.3
10.3
Supply Monitor on VDDIO
The Supply Monitor monitors VDDIO. It is inactive by default. It can be activated by software and
is fully programmable with 16 steps for the threshold (between 1.9V to 3.4V). It is controlled by
the Supply Controller (SUPC). A sample mode is possible. It allows to divide the supply monitor
power consumption by a factor of up to 2048. For more information, refer to the SUPC and Electrical Characteristics sections of the datasheet.
Reset Controller
The Reset Controller is based on a Power-on-Reset cell, and a Supply Monitor on VDDCORE.
The Reset Controller is capable to return to the software the source of the last reset, either a
general reset, a wake-up reset, a software reset, a user reset or a watchdog reset.
The Reset Controller controls the internal resets of the system and the NRST pin input/output. It
is capable to shape a reset signal for the external devices, simplifying to a minimum connection
of a push-button on the NRST pin to implement a manual reset.
The configuration of the Reset Controller is saved as supplied on VDDIO.
10.4
Supply Controller (SUPC)
The Supply Controller controls the power supplies of each section of the processor and the
peripherals (via Voltage regulator control)
The Supply Controller has its own reset circuitry and is clocked by the 32 kHz slow clock
generator.
36
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
The reset circuitry is based on a zero-power power-on reset cell and a brownout detector cell.
The zero-power power-on reset allows the Supply Controller to start properly, while the software-programmable brownout detector allows detection of either a battery discharge or main
voltage loss.
The Slow Clock generator is based on a 32 kHz crystal oscillator and an embedded 32 kHz RC
oscillator. The Slow Clock defaults to the RC oscillator, but the software can enable the crystal
oscillator and select it as the Slow Clock source.
The Supply Controller starts up the device by sequentially enabling the internal power switches
and the Voltage Regulator, then it generates the proper reset signals to the core power supply.
It also enables to set the system in different low power modes and to wake it up from a wide
range of events.
10.5
Clock Generator
The Clock Generator is made up of:
• One Low Power 32768Hz Slow Clock Oscillator with bypass mode
• One Low-Power RC Oscillator
• One 3-20 MHz Crystal or Ceramic resonator Oscillator, which can be bypassed
• One Fast RC Oscillator factory programmed, 3 output frequencies can be selected: 4, 8 or 12
MHz. By default 4 MHz is selected.
• One 60 to 130 MHz programmable PLL, capable to provide the clock MCK to the processor
and to the peripherals. The input frequency of PLL is from 3.5 to 20 MHz.
Figure 10-2. Clock Generator Block Diagram
Clock Generator
XTALSEL
On Chip 32 kHz
RC OSC
XIN32
XOUT32
XIN
XOUT
Slow Clock
SLCK
Slow Clock
Oscillator
3-20 MHz
Main
Oscillator
Main Clock
MAINCK
On Chip
12/8/4 MHz
RC OSC
MAINSEL
PLLA Clock
PLLACK
PLL and
Divider A
Status
Control
Power
Management
Controller
37
11011BS–ATARM–22-Feb-12
10.6
Power Management Controller
The Power Management Controller provides all the clock signals to the system. It provides:
• the Processor Clock HCLK
• the Free running processor clock FCLK
• the Cortex SysTick external clock
• the Master Clock MCK, in particular to the Matrix and the memory interfaces
• independent peripheral clocks, typically at the frequency of MCK
• three programmable clock outputs: PCK0, PCK1 and PCK2
The Supply Controller selects between the 32 kHz RC oscillator or the crystal oscillator. The
unused oscillator is disabled automatically so that power consumption is optimized.
By default, at startup the chip runs out of the Master Clock using the Fast RC Oscillator running
at 4 MHz.
The user can trim by software the 8 and 12 MHz RC Oscillator frequency.
Figure 10-3. SAM3N4/2/1/0/00 Power Management Controller Block Diagram
Processor
Clock
Controller
HCK
int
Sleep Mode
Divider
/8
SystTick
FCLK
Master Clock Controller
SLCK
MAINCK
Prescaler
/1,/2,/4,..,/64
MCK
PLLCK
Peripherals
Clock Controller
periph_clk[..]
ON/OFF
Programmable Clock Controller
SLCK
MAINCK
PLLCK
ON/OFF
Prescaler
/1,/2,/4,..,/64
pck[..]
The SysTick calibration value is fixed at 6000 which allows the generation of a time base of 1 ms
with SysTick clock at 6 MHz (48 MHz/8)
10.7
Watchdog Timer
• 16-bit key-protected only-once-Programmable Counter
• Windowed, prevents the processor to be in a dead-lock on the watchdog access
38
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
10.8
SysTick Timer
• 24-bit down counter
• Self-reload capability
• Flexible System timer
10.9
Real-time Timer
• Real-time Timer, allowing backup of time with different accuracies
– 32-bit Free-running back-up Counter
– Integrates a 16-bit programmable prescaler running on slow clock
– Alarm register capable to generate a wake-up of the system through the Shut Down
Controller
10.10 Real Time Clock
• Low power consumption
• Full asynchronous design
• Two hundred year calendar
• Programmable Periodic Interrupt
• Alarm and update parallel load
• Control of alarm and update Time/Calendar Data In
10.11 General Purpose Backup Registers
• Eight 32-bit general-purpose backup registers
10.12 Nested Vectored Interrupt Controller
• Thirty Two maskable external interrupts
• Sixteen priority levels
• Processor state automatically saved on interrupt entry, and restored on
• Dynamic reprioritization of interrupts
• Priority grouping
– selection of pre-empting interrupt levels and non pre-empting interrupt levels
• Support for tail-chaining and late arrival of interrupts
– back-to-back interrupt processing without the overhead of state saving and
restoration between interrupts.
• Processor state automatically saved on interrupt entry and restored on interrupt exit, with no
instruction overhead
39
11011BS–ATARM–22-Feb-12
10.13 Chip Identification
• Chip Identifier (CHIPID) registers permit recognition of the device and its revision.
Table 10-1.
SAM3N Chip ID Register
Chip Name
CHIPID_CIDR
CHIPID_EXID
ATSAM3N4C (Rev A)
0x29540960
0x0
ATSAM3N2C (Rev A)
0x29590760
0x0
ATSAM3N1C (Rev A)
0x29580560
0x0
ATSAM3N4B (Rev A)
0x29440960
0x0
ATSAM3N2B (Rev A)
0x29490760
0x0
ATSAM3N1B (Rev A)
0x29480560
0x0
ATSAM3N4A (Rev A)
0x29340960
0x0
ATSAM3N2A (Rev A)
0x29390760
0x0
ATSAM3N1A (Rev A)
0x29380560
0x0
• JTAG ID: 0x05B2E03F
10.14 UART
• Two-pin UART
– Implemented features are 100% compatible with the standard Atmel USART
– Independent receiver and transmitter with a common programmable Baud Rate
Generator
– Even, Odd, Mark or Space Parity Generation
– Parity, Framing and Overrun Error Detection
– Automatic Echo, Local Loopback and Remote Loopback Channel Modes
– Support for two PDC channels with connection to receiver and transmitter
10.15 PIO Controllers
• 3 PIO Controllers, PIOA, PIOB and PIOC (100-pin version only) controlling a maximum of 79
I/O Lines
• Each PIO Controller controls up to 32 programmable I/O Lines
• Fully programmable through Set/Clear Registers
Table 10-2.
PIO available according to pin count
Version
48 pin
64 pin
100 pin
PIOA
21
32
32
PIOB
13
15
15
PIOC
-
-
32
• Multiplexing of four peripheral functions per I/O Line
• For each I/O Line (whether assigned to a peripheral or used as general purpose I/O)
– Input change, rising edge, falling edge, low level and level interrupt
– Debouncing and Glitch filter
40
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
– Multi-drive option enables driving in open drain
– Programmable pull up on each I/O line
– Pin data status register, supplies visibility of the level on the pin at any time
• Selection of the drive level
• Synchronous output, provides Set and Clear of several I/O lines in a single write
11. Peripherals
11.1
Peripheral Identifiers
Table 11-1 defines the Peripheral Identifiers of the SAM3N4/2/1/0/00. A peripheral identifier is
required for the control of the peripheral interrupt with the Nested Vectored Interrupt Controller
and for the control of the peripheral clock with the Power Management Controller.
Table 11-1.
Peripheral Identifiers
Instance ID
Instance Name
NVIC Interrupt
PMC Clock Control
Instance Description
0
SUPC
X
Supply Controller
1
RSTC
X
Reset Controller
2
RTC
X
Real Time Clock
3
RTT
X
Real Time Timer
4
WDT
X
Watchdog Timer
5
PMC
X
Power Management Controller
6
EEFC
X
Enhanced Flash Controller
7
-
-
Reserved
8
UART0
X
X
UART 0
9
UART1
X
X
UART 1
10
-
-
-
Reserved
11
PIOA
X
X
Parallel I/O Controller A
12
PIOB
X
X
Parallel I/O Controller B
13
PIOC
X
X
Parallel I/O Controller C
14
USART0
X
X
USART 0
15
USART1
X
X
USART 1
16
-
-
-
Reserved
17
-
-
-
Reserved
18
-
-
-
Reserved
19
TWI0
X
X
Two Wire Interface 0
20
TWI1
X
X
Two Wire Interface 1
21
SPI
X
X
Serial Peripheral Interface
22
-
-
-
Reserved
23
TC0
X
X
Timer/Counter 0
24
TC1
X
X
Timer/Counter 1
41
11011BS–ATARM–22-Feb-12
Table 11-1.
Peripheral Identifiers (Continued)
Instance ID
Instance Name
NVIC Interrupt
PMC Clock Control
25
TC2
X
X
Timer/Counter 2
26
TC3
X
X
Timer/Counter 3
27
TC4
X
X
Timer/Counter 4
28
TC5
X
X
Timer/Counter 5
29
ADC
X
X
Analog-to-Digital Converter
30
DACC
X
X
Digital-to-Analog Converter
31
PWM
X
X
Pulse Width Modulation
11.2
Instance Description
Peripheral Signals Multiplexing on I/O Lines
The SAM3N product features 2 PIO controllers (48-pin and 64-pin version) or 3 PIO controllers
(100-pin version), PIOA, PIOB and PIOC, that multiplex the I/O lines of the peripheral set.
The SAM3N 64-pin and 100-pin PIO Controller controls up to 32 lines (see Table 10-2, “PIO
available according to pin count,” on page 40). Each line can be assigned to one of three peripheral functions: A, B or C. The multiplexing tables in the following paragraphs define how the I/O
lines of the peripherals A, B and C are multiplexed on the PIO Controllers. The column “Comments” has been inserted in this table for the user’s own comments; it may be used to track how
pins are defined in an application.
Note that some peripheral functions which are output only, might be duplicated within the tables.
42
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
11.2.1
PIO Controller A Multiplexing
Table 11-2.
Multiplexing on PIO Controller A (PIOA)
I/O Line
Peripheral A
Peripheral B
Peripheral C
PA0
PWM0
TIOA0
WKUP0
High drive
PA1
PWM1
TIOB0
WKUP1
High drive
PA2
PWM2
SCK0
WKUP2
High drive
PA3
TWD0
NPCS3
PA4
TWCK0
TCLK0
WKUP3
PA5
RXD0
NPCS3
WKUP4
PA6
TXD0
PCK0
PA7
RTS0
PWM3
PA8
CTS0
ADTRG
WKUP5
PA9
URXD0
NPCS1
WKUP6
PA10
UTXD0
NPCS2
PA11
NPCS0
PWM0
PA12
MISO
PWM1
PA13
MOSI
PWM2
PA14
SPCK
PWM3
WKUP8
PA15
TIOA1
WKUP14
PA16
TIOB1
WKUP15
PA17
PCK1
AD0
PA18
PCK2
AD1
DATRG
Extra Function
System Function
Comments
High drive
XIN32
XOUT32
WKUP7
PA19
AD2/WKUP9
PA20
AD3/WKUP10
PA21
RXD1
PCK1
AD8
64/100-pin versions
PA22
TXD1
NPCS3
AD9
64/100-pin versions
PA23
SCK1
PWM0
64/100-pin versions
PA24
RTS1
PWM1
64/100-pin versions
PA25
CTS1
PWM2
64/100-pin versions
PA26
TIOA2
64/100-pin versions
PA27
TIOB2
64/100-pin versions
PA28
TCLK1
64/100-pin versions
PA29
TCLK2
64/100-pin versions
PA30
NPCS2
PA31
NPCS1
PCK2
WKUP11
64/100-pin versions
64/100-pin versions
43
11011BS–ATARM–22-Feb-12
11.2.2
PIO Controller B Multiplexing
Table 11-3.
Multiplexing on PIO Controller B (PIOB)
I/O Line
Peripheral A
Peripheral B
Peripheral C
Extra Function
PB0
PWM0
AD4
PB1
PWM1
AD5
PB2
URXD1
NPCS2
AD6/WKUP12
PB3
UTXD1
PCK2
AD7
PB4
TWD1
PWM2
PB5
TWCK1
System Function
Comments
TDI
WKUP13
TDO/
TRACESWO
PB6
TMS/SWDIO
PB7
TCK/SWCLK
PB8
XOUT
PB9
XIN
PB10
PB11
PB12
ERASE
PB13
PB14
44
PCK0
NPCS1
PWM3
DAC0
64/100-pin versions
64/100-pin versions
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
11.2.3
I/O Line
PIO Controller C Multiplexing
Peripheral A
Peripheral B
Peripheral C
Extra Function
System Function
Comments
PC0
100-pin version
PC1
100-pin version
PC2
100-pin version
PC3
100-pin version
PC4
NPCS1
100-pin version
PC5
100-pin version
PC6
100-pin version
PC7
NPCS2
100-pin version
PC8
PWM0
100-pin version
PC9
PWM1
100-pin version
PC10
PWM2
100-pin version
PC11
PWM3
100-pin version
PC12
AD12
100-pin version
PC13
AD10
100-pin version
PC14
PCK2
PC15
100-pin version
AD11
100-pin version
PC16
PCK0
100-pin version
PC17
PCK1
100-pin version
PC18
PWM0
100-pin version
PC19
PWM1
100-pin version
PC20
PWM2
100-pin version
PC21
PWM3
100-pin version
PC22
PWM0
100-pin version
PC23
TIOA3
100-pin version
PC24
TIOB3
100-pin version
PC25
TCLK3
100-pin version
PC26
TIOA4
100-pin version
PC27
TIOB4
100-pin version
PC28
TCLK4
100-pin version
PC29
TIOA5
AD13
100-pin version
PC30
TIOB5
AD14
100-pin version
PC31
TCLK5
AD15
100-pin version
45
11011BS–ATARM–22-Feb-12
12. Embedded Peripherals Overview
12.1
Serial Peripheral Interface (SPI)
• Supports communication with serial external devices
– Four chip selects with external decoder support allow communication with up to 15
peripherals
– Serial memories, such as DataFlash and 3-wire EEPROMs
– Serial peripherals, such as ADCs, DACs, LCD Controllers, CAN Controllers and
Sensors
– External co-processors
• Master or slave serial peripheral bus interface
– 8- to 16-bit programmable data length per chip select
– Programmable phase and polarity per chip select
– Programmable transfer delays between consecutive transfers and between clock
and data per chip select
– Programmable delay between consecutive transfers
– Selectable mode fault detection
• Very fast transfers supported
– Transfers with baud rates up to MCK
– The chip select line may be left active to speed up transfers on the same device
12.2
Two Wire Interface (TWI)
• Master, Multi-Master and Slave Mode Operation
• Compatibility with Atmel two-wire interface, serial memory and I2C compatible devices
• One, two or three bytes for slave address
• Sequential read/write operations
• Bit Rate: Up to 400 kbit/s
• General Call Supported in Slave Mode
• Connecting to PDC channel capabilities optimizes data transfers in Master Mode only (for
TWI0 only)
– One channel for the receiver, one channel for the transmitter
– Next buffer support
12.3
Universal Asynchronous Receiver Transceiver (UART)
• Two-pin UART
– Implemented features are 100% compatible with the standard Atmel USART
– Independent receiver and transmitter with a common programmable Baud Rate
Generator
– Even, Odd, Mark or Space Parity Generation
– Parity, Framing and Overrun Error Detection
– Automatic Echo, Local Loopback and Remote Loopback Channel Modes
46
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
– Support for two PDC channels with connection to receiver and transmitter (for
UART0 only)
12.4
USART
• Programmable Baud Rate Generator
• 5- to 9-bit full-duplex synchronous or asynchronous serial communications
– 1, 1.5 or 2 stop bits in Asynchronous Mode or 1 or 2 stop bits in Synchronous Mode
– Parity generation and error detection
– Framing error detection, overrun error detection
– MSB- or LSB-first
– Optional break generation and detection
– By 8 or by-16 over-sampling receiver frequency
– Hardware handshaking RTS-CTS
– Receiver time-out and transmitter timeguard
– Optional Multi-drop Mode with address generation and detection
• RS485 with driver control signal
• ISO7816, T = 0 or T = 1 Protocols for interfacing with smart cards (Only on USART0)
– NACK handling, error counter with repetition and iteration limit
• SPI Mode
– Master or Slave
– Serial Clock programmable Phase and Polarity
– SPI Serial Clock (SCK) Frequency up to MCK/4
• IrDA modulation and demodulation (Only on USART0)
– Communication at up to 115.2 Kbps
• Test Modes
– Remote Loopback, Local Loopback, Automatic Echo
• PDC support (for USART0 only)
12.5
Timer Counter (TC)
• Six 16-bit Timer Counter Channels
• Wide range of functions including:
– Frequency Measurement
– Event Counting
– Interval Measurement
– Pulse Generation
– Delay Timing
– Pulse Width Modulation
– Up/down Capabilities
• Each channel is user-configurable and contains:
– Three external clock inputs
– Five internal clock inputs
47
11011BS–ATARM–22-Feb-12
– Two multi-purpose input/output signals
• Two global registers that act on all three TC Channels
• Quadrature decoder
– Advanced line filtering
– Position/revolution/speed
• 2-bit Gray Up/Down Counter for Stepper Motor
12.6
Pulse Width Modulation Controller (PWM)
• Four channels, one 16-bit counter per channel
• Common clock generator, providing thirteen different clocks
– One Modulo n counter providing eleven clocks
– Two independent linear dividers working on modulo n counter outputs
• Independent channel programming
– Independent enable/disable commands
– Independent clock selection
– Independent period and duty cycle, with double buffering
– Programmable selection of the output waveform polarity
12.7
10-bit Analog-to-Digital Converter
• Up to 16-channel ADC
• 10-bit 384 Ksamples/sec. or 8-bit 583 Ksamples/sec. Successive Approximation Register
ADC
• ±2 LSB Integral Non Linearity, ±1 LSB Differential Non Linearity
• Integrated 8-to-1 multiplexer, offering eight independent 3.3V analog inputs
• External voltage reference for better accuracy on low voltage inputs
• Individual enable and disable of each channel
• Multiple trigger source
– Hardware or software trigger
– External trigger pin
– Timer Counter 0 to 2 outputs TIOA0 to TIOA2 trigger
• Sleep Mode and conversion sequencer
– Automatic wakeup on trigger and back to sleep mode after conversions of all
enabled channels
12.8
Digital-to-Analog Converter (DAC)
• 1 channel 10-bit DAC
• Up to 500 ksamples/s conversion rate
• Flexible conversion range
• Multiple trigger sources
• One PDC channel
48
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
13. Package Drawings
The SAM3N series devices are available in LQFP, QFN and TFBGA packages.
Figure 13-1. 100-lead LQFP Package Drawing
Note : 1. This drawing is for general information only. Refer to JEDEC Drawing MS-026 for additional information.
49
11011BS–ATARM–22-Feb-12
Figure 13-2. 100-ball TFBGA Package Drawing
50
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Figure 13-3. 64- and 48-lead LQFP Package Drawing
51
11011BS–ATARM–22-Feb-12
Table 13-1.
48-lead LQFP Package Dimensions (in mm)
Millimeter
Inch
Symbol
Min
Nom
Max
Min
Nom
Max
A
–
–
1.60
–
–
0.063
A1
0.05
–
0.15
0.002
–
0.006
A2
1.35
1.40
1.45
0.053
0.055
0.057
D
9.00 BSC
0.354 BSC
D1
7.00 BSC
0.276 BSC
E
9.00 BSC
0.354 BSC
E1
7.00 BSC
0.276 BSC
R2
0.08
–
0.20
0.003
–
0.008
R1
0.08
–
–
0.003
–
–
q
0°
3.5°
7°
0°
3.5°
7°
θ1
0°
–
–
0°
–
–
θ2
11°
12°
13°
11°
12°
13°
θ3
11°
12°
13°
11°
12°
13°
c
0.09
–
0.20
0.004
–
0.008
L
0.45
0.60
0.75
0.018
0.024
0.030
L1
1.00 REF
0.039 REF
S
0.20
–
–
0.008
–
–
b
0.17
0.20
0.27
0.007
0.008
0.011
e
0.50 BSC.
0.020 BSC.
D2
5.50
0.217
E2
5.50
0.217
Tolerances of Form and Position
52
aaa
0.20
0.008
bbb
0.20
0.008
ccc
0.08
0.003
ddd
0.08
0.003
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Table 13-2.
Symbol
64-lead LQFP Package Dimensions (in mm)
Millimeter
Inch
Min
Nom
Max
Min
Nom
Max
A
–
–
1.60
–
–
0.063
A1
0.05
–
0.15
0.002
–
0.006
A2
1.35
1.40
1.45
0.053
0.055
0.057
D
12.00 BSC
0.472 BSC
D1
10.00 BSC
0.383 BSC
E
12.00 BSC
0.472 BSC
E1
10.00 BSC
0.383 BSC
R2
0.08
–
0.20
0.003
–
0.008
R1
0.08
–
–
0.003
–
–
q
0°
3.5°
7°
0°
3.5°
7°
θ1
0°
–
–
0°
–
–
θ2
11°
12°
13°
11°
12°
13°
θ3
11°
12°
13°
11°
12°
13°
c
0.09
–
0.20
0.004
–
0.008
L
0.45
0.60
0.75
0.018
0.024
0.030
–
–
0.008
0.20
0.27
0.007
L1
1.00 REF
S
0.20
b
0.17
0.039 REF
–
–
0.008
0.011
e
0.50 BSC.
0.020 BSC.
D2
7.50
0.285
E2
7.50
0.285
Tolerances of Form and Position
aaa
0.20
0.008
bbb
0.20
0.008
ccc
0.08
0.003
ddd
0.08
0.003
53
11011BS–ATARM–22-Feb-12
Figure 13-4. 48-pad QFN Package Drawing
54
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Table 13-3.
48-pad QFN Package Dimensions (in mm)
Millimeter
Inch
Symbol
Min
Nom
Max
Min
Nom
Max
A
–
–
090
–
–
0.035
A1
–
–
0.050
–
–
0.002
A2
–
0.65
0.70
–
0.026
0.028
A3
b
0.20 REF
0.18
D
D2
0.20
0.008 REF
0.23
0.007
7.00 bsc
5.45
E
5.60
0.008
0.009
0.276 bsc
5.75
0.215
7.00 bsc
0.220
0.226
0.276 bsc
E2
5.45
5.60
5.75
0.215
0.220
0.226
L
0.35
0.40
0.45
0.014
0.016
0.018
e
R
0.50 bsc
0.09
–
0.020 bsc
–
0.004
–
–
Tolerances of Form and Position
aaa
0.10
0.004
bbb
0.10
0.004
ccc
0.05
0.002
55
11011BS–ATARM–22-Feb-12
Figure 13-5. 64-pad QFN Package Drawing
56
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
14. Ordering Information
Table 14-1.
Ordering Code
MRL
Flash
(Kbytes)
Package
Package Type
Temperature
Operating Range
ATSAM3N4CA-AU
A
256
LQFP100
Green
Industrial
-40°C to 85°C
ATSAM3N4CA-CU
A
256
TFBGA100
Green
Industrial
-40°C to 85°C
ATSAM3N4BA-AU
A
256
LQFP64
Green
Industrial
-40°C to 85°C
ATSAM3N4BA-MU
A
256
QFN64
Green
Industrial
-40°C to 85°C
ATSAM3N4AA-AU
A
256
LQFP48
Green
Industrial
-40°C to 85°C
ATSAM3N4AA-MU
A
256
QFN48
Green
Industrial
-40°C to 85°C
ATSAM3N2CA-AU
A
128
LQFP100
Green
Industrial
-40°C to 85°C
ATSAM3N2CA-CU
A
128
TFBGA100
Green
Industrial
-40°C to 85°C
ATSAM3N2BA-AU
A
128
LQFP64
Green
Industrial
-40°C to 85°C
ATSAM3N2BA-MU
A
128
QFN64
Green
Industrial
-40°C to 85°C
ATSAM3N2AA-AU
A
128
LQFP48
Green
Industrial
-40°C to 85°C
ATSAM3N2AA-MU
A
128
QFN48
Green
Industrial
-40°C to 85°C
ATSAM3N1CA-AU
A
64
LQFP100
Green
Industrial
-40°C to 85°C
ATSAM3N1CB-AU
B
64
LQFP100
Green
Industrial
-40°C to 85°C
ATSAM3N1CA-CU
A
64
TFBGA100
Green
Industrial
-40°C to 85°C
ATSAM3N1CB-CU
B
64
TFBGA100
Green
Industrial
-40°C to 85°C
ATSAM3N1BA-AU
A
64
LQFP64
Green
Industrial
-40°C to 85°C
ATSAM3N1BB-AU
B
64
LQFP64
Green
Industrial
-40°C to 85°C
ATSAM3N1BA-MU
A
64
QFN 64
Green
Industrial
-40°C to 85°C
ATSAM3N1BB-MU
B
64
QFN 64
Green
Industrial
-40°C to 85°C
57
11011BS–ATARM–22-Feb-12
Table 14-1.
Ordering Code
MRL
Flash
(Kbytes)
Package
Package Type
ATSAM3N1AA-AU
A
64
LQFP48
Green
Industrial
-40°C to 85°C
ATSAM3N1AB-AU
B
64
LQFP48
Green
Industrial
-40°C to 85°C
ATSAM3N1AA-MU
A
64
QFN48
Green
Industrial
-40°C to 85°C
ATSAM3N1AB-MU
B
64
QFN48
Green
Industrial
-40°C to 85°C
ATSAM3N0CA-AU
A
32
LQFP100
Green
Industrial
-40°C to 85°C
ATSAM3N0CA-CU
A
32
TFBGA100
Green
Industrial
-40°C to 85°C
ATSAM3N0BA-AU
A
32
LQFP64
Green
Industrial
-40°C to 85°C
ATSAM3N0BA-MU
A
32
QFN64
Green
Industrial
-40°C to 85°C
ATSAM3N0AA-AU
A
32
LQFP48
Green
Industrial
-40°C to 85°C
ATSAM3N0AA-MU
A
32
QFN48
Green
Industrial
-40°C to 85°C
ATSAM3N00BA-AU
A
16
LQFP64
Green
Industrial
-40°C to 85°C
ATSAM3N00BA-MU
A
16
QFN64
Green
Industrial
-40°C to 85°C
ATSAM3N00AA-AU
A
16
LQFP48
Green
Industrial
-40°C to 85°C
ATSAM3N00AA-MU
A
16
QFN48
Green
Industrial
-40°C to 85°C
58
Temperature
Operating Range
SAM3N Summary
11011BS–ATARM–22-Feb-12
SAM3N Summary
Revision History
Doc. Rev.
11011BS
Comments
Change
Request Ref.
Overview:
All mentions of 100-ball LFBGA changed into 100-ball TFBGA
Section 8. “Product Mapping”, Heading was ‘Memories’. Changed to ‘Product Mapping’
Section 4.1.4 “100-ball TFBGA Pinout”, whole pinout table updated
Updated package dimensions in ‘Features’
8044
7685
7201
7965
Doc. Rev
Comments
Change
Request Ref.
11011AS
First issue
59
11011BS–ATARM–22-Feb-12
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11011BS–ATARM–22-Feb-12
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