ATMEL ATSAM3U4EA-AU At91arm m3 cortex-based processor Datasheet

Features
• Core
•
•
•
•
•
•
– ARM® Cortex®-M3 revision 2.0 running at up to 96 MHz
– Memory Protection Unit (MPU)
– Thumb®-2 instruction set
Memories
– From 64 to 256 Kbytes embedded Flash, 128-bit wide access, memory accelerator,
dual bank
– From 16 to 48 Kbytes embedded SRAM with dual banks
– 16 Kbytes ROM with embedded bootloader routines (UART, USB) and IAP routines
– Static Memory Controller (SMC): SRAM, NOR, NAND support. NAND Flash
controller with 4-kbyte RAM buffer and ECC
System
– Embedded voltage regulator for single supply operation
– POR, BOD and Watchdog for safe reset
– Quartz or resonator oscillators: 3 to 20 MHz main 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 fast device startup
– Slow Clock Internal RC oscillator as permanent clock for device clock in low power
mode
– One PLL for device clock and one dedicated PLL for USB 2.0 High Speed Device
– Up to 19 peripheral DMA (PDC) channels and 4-channel central DMA
Low Power Modes
– Sleep and Backup modes, down to 2.5 µA in Backup mode.
– Backup domain: VDDBU pin, RTC, 32 backup registers
– Ultra low power RTC: 0.6 µA
Peripherals
– USB 2.0 Device: 480 Mbps, 4-kbyte FIFO, up to 7 bidirectional Endpoints,
dedicated DMA
– Up to 4 USARTs (ISO7816, IrDA®, Flow Control, SPI, Manchester support) and one
UART
– Up to 2 TWI (I2C compatible), 1 SPI, 1 SSC (I2S), 1 HSMCI (SDIO/SD/MMC)
– 3-Channel 16-bit Timer/Counter (TC) for capture, compare and PWM
– 4-channel 16-bit PWM (PWMC)
– 32-bit Real Time Timer (RTT) and RTC with calendar and alarm features
– 8-channel 12-bit 1Msps ADC with differential input mode and programmable gain
stage, 8-channel 10-bit ADC
I/O
– Up to 96 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/Outputs (PIO)
Packages
– 100-lead LQFP, 14 x 14 mm, pitch 0.5 mm
– 100-ball LFBGA, 9 x 9 mm, pitch 0.8 mm
– 144-lead LQFP, 20 x 20 mm, pitch 0.5 mm
– 144-ball LFBGA, 10 x 10 mm, pitch 0.8 mm
AT91ARM M3
Cortex-based
Processor
ATSAM3U Series
Preliminary
Summary
NOTE: This is a summary document.
The complete document is available on
the Atmel website at www.atmel.com.
6430BS–ATARM–01-Sep-09
1. SAM3U Description
Atmel's SAM3U 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 96 MHz
and features up to 256 Kbytes of Flash and up to 52 Kbytes of SRAM. The peripheral set
includes a High Speed USB Device port with embedded transceiver, a High Speed MCI for
SDIO/SD/MMC, an External Bus Interface with NAND Flash controller, up to 4x USARTs
(SAM3U1C/2C/4C have 3), up to 2x TWIs (SAM3U1C/2C/4C have 1), up to 5x SPIs
SAM3U1C/2C/4C have 4), as well as 4x PWM timers, 3x general purpose 16-bit timers, an RTC,
a 12-bit ADC and a 10-bit ADC.
The SAM3U architecture is specifically designed to sustain high speed data transfers. It includes
a multi-layer bus matrix as well as multiple SRAM banks, PDC and DMA channels that enable it
to run tasks in parallel and maximize data throughput.
It can operate from 1.62V to 3.6V and comes in 100-pin and 144-pin LQFP and BGA packages.
The SAM3U device is particularly well suited for USB applications: data loggers, PC peripherals
and any high speed bridge (USB to SDIO, USB to SPI, USB to External Bus Interface).
1.1
Configuration Summary
The SAM3U series differ in memory sizes, package and features list. Table 1-1 summarizes the
configurations of the six devices.
Table 1-1.
Configuration Summary
Flash
Organization SRAM
Number
of PIOs
Number
of
USARTs
Number
of TWI
FWUP,
SHDN
pins
External Bus
Interface
HSMCI
data
size
Device
Flash
SAM3U4E
2x 128
Kbytes
dual plane
52
Kbytes
96
4
2
Yes
8 or 16 bits,
4 chip selects,
24-bit address
8 bits
SAM3U2E
128
Kbytes
single plane
36
Kbytes
96
4
2
Yes
8 or 16 bits,
4 chip selects
24-bit address
8 bits
SAM3U1E
64
Kbytes
single plane
20
Kbytes
96
4
2
Yes
8 or 16 bits,
4 chip selects,
24-bit address
8 bits
SAM3U4C
2 x 128
Kbytes
dual plane
52
Kbytes
57
3
1
No
8 bits,
2 chip selects,
8-bit address
4 bits
SAM3U2C
128
Kbytes
single plane
36
Kbytes
57
3
1
No
8 bits,
2 chip selects, 8- 4 bits
bit address
SAM3U1C
64
Kbytes
single plane
20
Kbytes
57
3
1
No
8 bits
2 chip selects,
8-bit address
Note:
2
4 bits
Package
ADC
LQFP144
2 (8+ 8
channels)
BGA144
LQFP144
BGA144
LQFP144
BGA144
LQFP100
BGA100
LQFP100
BGA100
LQFP100
BGA100
2 (8+ 8
channels)
2 (8+ 8
channels)
2 (4+ 4
channels)
2 (4+ 4
channels)
2 (4+ 4
channels)
1. The SRAM size takes into account the 4 Kbytes RAM buffer of the NAND Flash Controller (NFC) which can be used by the
core if not used by the NFC.
SAM3U Series
6430BS–ATARM–01-Sep-09
6430BS–ATARM–01-Sep-09
BOD
VDDCORE
POR
VDDBU
NRST
ERASE
PIOC
PIOA
SUPC
SHDN
FWUP
NRSTB
OSC
32K
XIN32
XOUT32
RC 32k
SM
WDT
RC Osc.
12/8/4 M
OSC
3-20 M
UPLL
PLLA
VDDUTMI
XIN
XOUT
PCK0-PCK2
TD
TDI
O
TM /TR
S A
T /S CE
C
K/ WD SW
SW IO O
CL
K
8-channel
12-bit ADC
10-bit ADC
PDC
FLASH
2x128KBytes
1x128 KBytes
1x 64kbytes
MPU
I/D
SE
S
L
TWI0
TWI1
PDC
N
V
I
C
UART
USART0
USART1
USART2
USART3
PDC
APB
ROM
16KBytes
PWM
PDC
Peripheral
DMA
Controller
5-layer AHB Bus Matrix
DMA
USB
Device
HS
HS UTMI
Transceiver
SRAM1
16KBytes
16KBytes
PDC
SRAM0
32KBytes
16KBytes
8KBytes
Cortex-M3 Processor
Fmax 96MHz
Flash
Unique
Identifier
JT
AG
SysTick Counter
In-Circuit Emulator
JTAG & Serial Wire
DI
SPI
Peripheral
Bridge
TC0
TC1
TC2
VD
N
DO
UT
HSMCI
A7 A K
TK TF TD RD RF RK -D CD C
0
DA
SSC
4-Channel
DMA
Voltage
Regulator
VD
1 1
0
I
EF A
3
G D7 7
D
S3 S3 K3 X3 D3 D RI0 R0 R0
2 2 2
S3 K S O
R
H L3
R
XD D
B
N
W CK
S
C PC O IS
R TX -CT-RT-SC-RD-TX DC
LK A B
D DT WM WM
BV DA 2BT 0-A 12 0-T TW
U U
C -TIO TIO -NP S M M
0 0 0 0 0
2
D 1 AD -AD D 0P
1
T
P
S
K
S
X
D
0
V
0
0
T
D
D
0 A B
0 0
W K
S
C RT SC RD TX
H L
-A
-A
B0 T C
LK IO IO
M WM
PC
G
12
EF
N
TW
TC T T
TR
PW P
AD
VR
D
D
A
A
PIOB
RSTC
RTC
RTT
8
GPBREG
PMC
System Controller
SLAVE
Static
Memory
Controller
Nand Flash
SRAM
(4KBytes)
NAND Flash
Controller
& ECC
EBI
NANDOE, NANDWE
NCS2
NCS3
A22/NANDCLE
A21/NANDALE
A23
NWAIT
NCS0
NCS1
NRD
NWR0/NWE
NWR1/NBS1
D0-D15
A0/NBS0
A1
A2-A20
NANDRDY
Figure 2-1.
TST
MASTER
II
TM
P M DP DM
U
D G FSDFSDHS HS
VD VB D D D D
SAM3U Series
2. SAM3U Block Diagram
144-pin SAM3U4/2/1E Block Diagram
3
4
PLLA
NRST
ERASE
NRSTB
VDDBU
FWUP
PIOA
POR
SUPC
OSC
32K
RC 32k
BOD
VDDCORE
WDT
RC Osc.
12/8/4 M
OSC
3-20 M
UPLL
SM
XIN32
XOUT32
VR
AD
AD
EF
PIOB
RSTC
RTC
RTT
8
GPBREG
PMC
MPU
I/D
SE
TWI
PDC
SRAM0
32KBytes
16KBytes
8KBytes
S
L
UART
USART0
USART1
USART2
PDC
APB
ROM
16KBytes
PWM
PDC
Peripheral
DMA
Controller
5-layer AHB Bus Matrix
DMA
SRAM1
16KBytes
16KBytes
8KBytes
PDC
N
V
I
C
USB
Device
HS
HS UTMI
Transceiver
DI
SPI
Peripheral
Bridge
TC0
TC1
TC2
A
VD
N
DO
UT
HSMCI
3 A K
TK TF TD RD RF RK -DA CD C
0
DA
SSC
4-Channel
DMA
Voltage
Regulator
VD
I
2 2 2 2 2 0 I0 0 0
3 3
G D3 3 D CK
A
2 2 2
S3 K S O
TS S K X D CD R SR TR MH ML
N
XD D
C PC O IS
TR A 2B TW W
R TX -C -RT -SC-RD-TX D
LK A B
D D W W
T
DA 2B D0- D1
U U
C TIO TIO -NP S M M
0 0 0 0 0
P
T
P
S
K
X
S
D
0
VD D1 A 0-A
T
0 A0 B0
0 0
S
C RT SC RD TX
H L
-A
B
LK IO IO
M WM
G
PC
12
N
TC T T
TR
PW P
AD
D
EF
4-channel
12-bit ADC
10-bit ADC
PDC
FLASH
2x128KBytes
1x128 KBytes
1x 64kbytes
Flash
Unique
Identifier
JT
AG
SysTick Counter
In-Circuit Emulator
JTAG & Serial Wire
TD
TDI
O
TM /TR
S A
TC /SW CE
S
K
/
SW DIO WO
CL
K
Cortex-M3 Processor
Fmax 96MHz
VR
B
12
SLAVE
System Controller
VDDUTMI
XIN
XOUT
PCK0-PCK2
TST
MASTER
II
TM
P M DP DM
U
D G FSDFSDHS HS
VD VB D D D D
Static
Memory
Controller
Nand Flash
SRAM
(4KBytes)
NAND Flash
Controller
& ECC
EBI
NANDOE, NANDWE
NANDCLE
NANDALE
NCS0
NCS1
NRD
NWE
D0-D7
A0
A1
A2-A7
NANDRDY
Figure 2-2.
100-pin SAM3U4/2/1C Block Diagram
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
3. Signal Description
Table 3-1 gives details on the signal names 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 Input
Power
1.8V to 3.6V
VDDOUT
Voltage Regulator Output
Power
1.8V
VDDUTMII
USB UTMI+ Interface Power Supply
Power
3.0V to 3.6V
GNDUTMII
USB UTMI+ Interface Ground
Ground
VDDBU
Backup I/O Lines Power Supply
Power
GNDBU
Backup Ground
Ground
VDDPLL
PLL A, UPLL and OSC 3-20 MHz Power Supply
Power
GNDPLL
PLL A, UPLL and OSC 3-20 MHz Ground
Ground
VDDANA
ADC Analog Power Supply
Power
GNDANA
ADC Analog Ground
Ground
VDDCORE
Core, Memories and Peripherals Chip Power
Supply
Power
GND
Ground
Ground
1.62V to 3.6V
1.62 V to 1.95V
2.0V to 3.6V
1.62V to 1.95V
Clocks, Oscillators and PLLs
XIN
Main Oscillator Input
Input
XOUT
Main Oscillator Output
XIN32
Slow Clock Oscillator Input
XOUT32
Slow Clock Oscillator Output
Output
VBG
Bias Voltage Reference
Analog
PCK0 - PCK2
Programmable Clock Output
Output
VDDPLL
Output
Input
VDDBU
VDDIO
Shutdown, Wakeup Logic
SHDN
Shut-Down Control
FWUP
Force Wake-Up Input
Output
Input
VDDBU
Low
push/pull
0: The device is in
backup mode
1: The device is running
(not in backup mode)
Needs external pull-up
Serial Wire/JTAG Debug Port (SWJ-DP)
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
Input
JTAGSEL
JTAG Selection
Input
No pull-up resistor
VDDIO
Output
No pull-up resistor
No pull-up resistor
High
VDDBU
Internal permanent
pull-down
5
6430BS–ATARM–01-Sep-09
Table 3-1.
Signal Name
Signal Description List (Continued)
Function
Type
Active
Level
Voltage
Reference Comments
Flash Memory
ERASE
Flash and NVM Configuration Bits Erase
Command
Input
High
VDDBU
I/O
Low
VDDIO
Input
Low
Internal permanent 15K
pulldown
Reset/Test
NRST
Microcontroller Reset
NRSTB
Asynchronous Microcontroller Reset
VDDBU
TST
Test Select
Input
Internal permanent
pullup
Internal permanent
pullup
Internal permanent
pulldown
Universal Asynchronous Receiver Transceiver - UART
URXD
UART Receive Data
Input
UTXD
UART Transmit Data
Output
PIO Controller - PIOA - PIOB - PIOC
PA0 - PA31
PB0 - PB31
PC0 - PC31
Parallel IO Controller A
Parallel IO Controller B
Parallel IO Controller C
I/O
•Schmitt Trigger (1)
Reset State:
•PIO Input
•Internal pullup enabled
I/O
•Schmitt Trigger (2)
Reset State:
•PIO Input
•Internal pullup enabled
VDDIO
•Schmitt Trigger(3)
Reset State:
•PIO Input
•Internal pullup enabled
I/O
External Bus Interface
D0 - D15
Data Bus
A0 - A23
Address Bus
NWAIT
External Wait Signal
I/O
Output
Input
Low
Static Memory Controller - SMC
NCS0 - NCS3
Chip Select Lines
Output
Low
NWR0 - NWR1
Write Signal
Output
Low
NRD
Read Signal
Output
Low
NWE
Write Enable
Output
Low
NBS0 - NBS1
Byte Mask Signal
Output
Low
NAND Flash Controller - NFC
NANDOE
NAND Flash Output Enable
Output
Low
NANDWE
NAND Flash Write Enable
Output
Low
NANDRDY
NAND Ready
6
Input
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
Table 3-1.
Signal Description List (Continued)
Signal Name
Function
Type
Active
Level
Voltage
Reference Comments
High Speed Multimedia Card Interface - HSMCI
CK
Multimedia Card Clock
I/O
CDA
Multimedia Card Slot A Command
I/O
DA0 - DA7
Multimedia Card Slot A Data
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
DTR0
USART0 Data Terminal Ready
DSR0
USART0 Data Set Ready
DCD0
USART0 Data Carrier Detect
RI0
USART0 Ring Indicator
Output
Input
I/O
Input
Output
Input
Synchronous Serial Controller - SSC
TD
SSC Transmit Data
Output
RD
SSC Receive Data
Input
TK
SSC Transmit Clock
I/O
RK
SSC Receive Clock
I/O
TF
SSC Transmit Frame Sync
I/O
RF
SSC Receive Frame Sync
I/O
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
PWMHx
PWM Waveform Output High for channel x
Output
only output in
complementary mode
when dead time
insertion is enabled
PWM Waveform Output Low for channel x
PWMLx
PWMFI0-2
Output
PWM Fault Input
Input
Serial Peripheral Interface - SPI
MISO
Master In Slave Out
I/O
MOSI
Master Out Slave In
I/O
SPCK
SPI Serial Clock
I/O
NPCS0
SPI Peripheral Chip Select 0
I/O
Low
NPCS1 - NPCS3
SPI Peripheral Chip Select
Output
Low
7
6430BS–ATARM–01-Sep-09
Table 3-1.
Signal Description List (Continued)
Signal Name
Function
Type
Active
Level
Voltage
Reference Comments
Two-Wire Interface - TWI
TWDx
TWIx Two-wire Serial Data
I/O
TWCKx
TWIx Two-wire Serial Clock
I/O
12-bit Analog-to-Digital Converter - ADC12B
AD12Bx
Analog Inputs
AD12BTRG
ADC Trigger
AD12BVREF
ADC Reference
Analog
Input
Analog
10-bit Analog-to-Digital Converter - ADC
ADx
Analog Inputs
ADTRG
ADC Trigger
ADVREF
ADC Reference
Analog
Input
Analog
Fast Flash Programming Interface - FFPI
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
Low
USB High Speed Device - UDPHS
DFSDM
USB Device Full Speed Data -
Analog
DFSDP
USB Device Full Speed Data +
Analog
DHSDM
USB Device High Speed Data -
Analog
DHSDP
USB Device High Speed Data +
Analog
Notes:
VDDUTMII
1. PIOA: Schmitt Trigger on all except PA14 on 100 and 144 packages.
2. PIOB: Schmitt Trigger on all except PB9 to PB16, PB25 to PB31 on 100 and 144 packages.
3. PIOC: Schmitt Trigger on all except PC20 to PC27 on 144 package.
3.1
Design Considerations
In order to facilitate schematic capture when using a SAM3U design, Atmel provides a “Schematics Checklist” Application note. Please visit http://www.atmel.com/products/AT91/
8
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
4. Package and Pinout
The SAM3U4/2/1E is available in 144-lead LQFP and 144-ball LFBGA packages.
The SAM3U4/2/1C is available in 100-lead LQFP and 100-ball LFBGA packages.
4.1
4.1.1
SAM3U4/2/1E Package and Pinout
144-ball LFBGA Package Outline
The 144-Ball LFBGA package has a 0.8 mm ball pitch and respects Green Standards. Its dimensions are 10 x 10 x 1.4 mm.
Figure 4-1.
Orientation of the 144-ball LFBGA Package
TOP VIEW
12
11
10
9
8
7
6
5
4
3
2
1
A B C D E F G H J
K L M
BALL A1
4.1.2
144-lead LQFP Package Outline
Figure 4-2.
Orientation of the 144-lead LQFP Package
108
73
109
72
144
37
1
36
9
6430BS–ATARM–01-Sep-09
4.1.3
144-lead LQFP Pinout
Table 4-1.
144-pin SAM3U4/2/1E Pinout
1
TDI
37
DHSDP
73
VDDANA
109
PA0/PGMNCMD
2
VDDOUT
38
DHSDM
74
ADVREF
110
PC0
3
VDDIN
39
VBG
75
GNDANA
111
PA1/PGMRDY
4
TDO/TRACESWO
40
VDDUTMI
76
AD12BVREF
112
PC1
5
PB31
41
DFSDM
77
PA22/PGMD14
113
PA2/PGMNOE
6
PB30
42
DFSDP
78
PA30
114
PC2
7
TMS/SWDIO
43
GNDUTMI
79
PB3
115
PA3/PGMNVALID
8
PB29
44
VDDCORE
80
PB4
116
PC3
9
TCK/SWCLK
45
PA28
81
PC15
117
PA4/PGMM0
10
PB28
46
PA29
82
PC16
118
PC4
11
NRST
47
PC22
83
PC17
119
PA5/PGMM1
12
PB27
48
PA31
84
PC18
120
PC5
13
PB26
49
PC23
85
VDDIO
121
PA6/PGMM2
14
PB25
50
VDDCORE
86
VDDCORE
122
PC6
15
PB24
51
VDDIO
87
PA13/PGMD5
123
PA7/PGMM3
16
VDDCORE
52
GND
88
PA14/PGMD6
124
PC7
17
VDDIO
53
PB0
89
PC10
125
VDDCORE
18
GND
54
PC24
90
GND
126
GND
19
PB23
55
PB1
91
PA15/PGMD7
127
VDDIO
20
PB22
56
PC25
92
PC11
128
PA8/PGMD0
21
PB21
57
PB2
93
PA16/PGMD8
129
PC8
22
PC21
58
PC26
94
PC12
130
PA9/PGMD1
23
PB20
59
PB11
95
PA17/PGMD9
131
PC9
24
PB19
60
GND
96
PB16
132
PA10/PGMD2
25
PB18
61
PB12
97
PB15
133
PA11/PGMD3
26
PB17
62
PB13
98
PC13
134
PA12/PGMD4
27
VDDCORE
63
PC27
99
PA18/PGMD10
135
FWUP
28
PC14
64
PA27
100
PA19/PGMD11
136
SHDN
29
PB14
65
PB5
101
PA20/PGMD12
137
ERASE
30
PB10
66
PB6
102
PA21/PGMD13
138
TST
31
PB9
67
PB7
103
PA23/PGMD15
139
VDDBU
32
PC19
68
PB8
104
VDDIO
140
GNDBU
33
GNDPLL
69
PC28
105
PA24
141
NRSTB
34
VDDPLL
70
PC29
106
PA25
142
JTAGSEL
35
XOUT
71
PC30
107
PA26
143
XOUT32
36
XIN
72
PC31
108
PC20
144
XIN32
10
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
4.1.4
144-ball LFBGA Pinout
Table 4-2.
144-ball SAM3U4/2/1E Pinout
A1
VBG
D1
DFSDM
G1
PB0
K1
PB7
A2
VDDUTMI
D2
DHSDM
G2
PC26
K2
PC31
A3
PB9
D3
GNDPLL
G3
PB2
K3
PC29
A4
PB10
D4
PC14
G4
PC25
K4
PB3
A5
PB19
D5
PB21
G5
PB1
K5
PB4
A6
PC21
D6
PB23
G6
GND
K6
PA14/PGMD6
A7
PB26
D7
PB24
G7
GND
K7
PA16/PGMD8
A8
TCK/SWCLK
D8
PB28
G8
VDDCORE
K8
PA18/PGMD10
A9
PB30
D9
TDI
G9
PC4
K9
PC20
A10
TDO/TRACESWO
D10
VDDBU
G10
PA6/PGMM2
K10
PA1/PGMRDY
A11
XIN32
D11
PA10/PGMD2
G11
PA7/PGMM3
K11
PC1
A12
XOUT32
D12
PA11/PGMD3
G12
PC6
K12
PC2
B1
VDDCORE
E1
PC22
H1
PC24
L1
PC30
B2
GNDUTMI
E2
PA28
H2
PC27
L2
ADVREF
B3
XOUT
E3
PC19
H3
PA27
L3
AD12BVREF
B4
PB14
E4
VDDCORE
H4
PB12
L4
PA22/PGMD14
B5
PB17
E5
GND
H5
PB11
L5
PC17
B6
PB22
E6
VDDIO
H6
GND
L6
PC10
B7
PB25
E7
GNDBU
H7
VDDCORE
L7
PC12
B8
PB29
E8
NRST
H8
PB16
L8
PA19/PGMD11
B9
VDDIN
E9
PB31
H9
PB15
L9
PA23/PGMD15
B10
JTAGSEL
E10
PA12/PGMD4
H10
PC3
L10
PA0/PGMNCMD
B11
ERASE
E11
PA8/PGMD0
H11
PA5/PGMM1
L11
PA26
B12
SHDN
E12
PC8
H12
PC5
L12
PC0
C1
DFSDP
F1
PA31
J1
PB5
M1
VDDANA
C2
DHSDP
F2
PA29
J2
PB6
M2
GNDANA
C3
XIN
F3
PC23
J3
PC28
M3
PA30
C4
VDDPLL
F4
VDDCORE
J4
PB8
M4
PC15
C5
PB18
F5
VDDIO
J5
PB13
M5
PC16
C6
PB20
F6
GND
J6
VDDIO
M6
PC18
C7
PB27
F7
GND
J7
PA13/PGMD5
M7
PA15/PGMD7
C8
TMS/SWDIO
F8
VDDIO
J8
PA17/PGMD9
M8
PC11
C9
VDDOUT
F9
PC9
J9
PC13
M9
PA20/PGMD12
C10
NRSTB
F10
PA9/PGMD1
J10
PA2/PGMNOE
M10
PA21/PGMD13
C11
TST
F11
VDDCORE
J11
PA3/PGMNVALID
M11
PA24
C12
FWUP
F12
PC7
J12
PA4/PGMM0
M12
PA25
11
6430BS–ATARM–01-Sep-09
4.2
4.2.1
SAM3U4/2/1C Package and Pinout
100-lead LQFP Package Outline
Figure 4-3.
Orientation of the 100-lead LQFP Package
75
76
50
100
26
1
4.2.2
51
25
100-ball LFBGA Package Outline
Figure 4-4.
Orientation of the 100-ball LFBGA Package
TOP VIEW
1 2 3 4 5 6 7 8 9 10
A
B
C
D
E
F
G
H
J
K
12
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
4.2.3
100-lead LQFP Pinout
Table 4-3.
100-pin SAM3U4/2/1C1 Pinout
1
VDDANA
26
PA0/PGMNCMD
51
TDI
76
DHSDP
2
ADVREF
27
PA1/PGMRDY
52
VDDOUT
77
DHSDM
3
GNDANA
28
PA2/PGMNOE
53
VDDIN
78
VBG
4
AD12BVREF
29
PA3/PGMNVALID
54
TDO/TRACESWO
79
VDDUTMI
5
PA22/PGMD14
30
PA4/PGMM0
55
TMS/SWDIO
80
DFSDM
6
PA30
31
PA5/PGMM1
56
TCK/SWCLK
81
DFSDP
7
PB3
32
PA6/PGMM2
57
NRST
82
GNDUTMI
8
PB4
33
PA7/PGMM3
58
PB24
83
VDDCORE
9
VDDCORE
34
VDDCORE
59
VDDCORE
84
PA28
10
PA13/PGMD5
35
GND
60
VDDIO
85
PA29
11
PA14/PGMD6
36
VDDIO
61
GND
86
PA31
12
PA15/PGMD7
37
PA8/PGMD0
62
PB23
87
VDDCORE
13
PA16/PGMD8
38
PA9/PGMD1
63
PB22
88
VDDIO
14
PA17/PGMD9
39
PA10/PGMD2
64
PB21
89
GND
15
PB16
40
PA11/PGMD3
65
PB20
90
PB0
16
PB15
41
PA12/PGMD4
66
PB19
91
PB1
17
PA18/PGMD10
42
FWUP
67
PB18
92
PB2
18
PA19/PGMD11
43
ERASE
68
PB17
93
PB11
19
PA20/PGMD12
44
TST
69
PB14
94
PB12
20
PA21/PGMD13
45
VDDBU
70
PB10
95
PB13
21
PA23/PGMD15
46
GNDBU
71
PB9
96
PA27
22
VDDIO
47
NRSTB
72
GNDPLL
97
PB5
23
PA24
48
JTAGSEL
73
VDDPLL
98
PB6
24
PA25
49
XOUT32
74
XOUT
99
PB7
25
PA26
50
XIN32
75
XIN
100
PB8
13
6430BS–ATARM–01-Sep-09
4.2.4
100-ball LFBGA Pinout
Table 4-4.
100-ball SAM3U4/2/1C Pinout
A1
VBG
C6
PB22
F1
PB1
H6
PA15/PGMD7
A2
XIN
C7
TMS/SWDIO
F2
PB12
H7
PA18/PGMD10
A3
XOUT
C8
NRSTB
F3
VDDIO
H8
PA24
A4
PB17
C9
JTAGSEL
F4
PA31
H9
PA1/PGMRDY
A5
PB21
C10
VDDBU
F5
VDDIO
H10
PA2/PGMNOE
A6
PB23
D1
DFSDM
F6
GND
J1
PB6
A7
TCK/SWCLK
D2
DHSDM
F7
PB16
J2
PB8
A8
VDDIN
D3
VDDPLL
F8
PA6/PGMM2
J3
ADVREF
A9
VDDOUT
D4
VDDCORE
F9
VDDCORE
J4
PA30
A10
XIN32
D5
PB20
F10
PA7/PGMM3
J5
PB3
B1
VDDCORE
D6
ERASE
G1
PB11
J6
PA16/PGMD8
B2
GNDUTMI
D7
TST
G2
PB2
J7
PA19/PGMD11
B3
VDDUTMI
D8
FWUP
G3
PB0
J8
PA21/PGMD13
B4
PB10
D9
PA11/PGMD3
G4
PB13
J9
PA26
B5
PB18
D10
PA12/PGMD4
G5
VDDCORE
J10
PA0/PGMNCMD
B6
PB24
E1
PA29
G6
GND
K1
PB7
B7
NRST
E2
GND
G7
PB15
K2
VDDANA
B8
TDO/TRACESWO
E3
PA28
G8
PA3/PGMNVALID
K3
GNDANA
B9
TDI
E4
PB9
G9
PA5/PGMM1
K4
AD12BVREF
B10
XOUT32
E5
GNDBU
G10
PA4/PGMM0
K5
PB4
C1
DFSDP
E6
VDDIO
H1
VDDCORE
K6
PA14/PGMD6
C2
DHSDP
E7
VDDCORE
H2
PB5
K7
PA17/PGMD9
C3
GNDPLL
E8
PA10/PGMD2
H3
PA27
K8
PA20/PGMD12
C4
PB14
E9
PA9/PGMD1
H4
PA22/PGMD14
K9
PA23/PGMD15
C5
PB19
E10
PA8/PGMD0
H5
PA13/PGMD5
K10
PA25
14
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
5. Power Considerations
5.1
Power Supplies
The SAM3U product has several types of power supply pins:
• VDDCORE pins: Power the core, the embedded memories and the peripherals; voltage
ranges from 1.62V and 1.95V.
• VDDIO pins: Power the Peripherals I/O lines; voltage ranges from 1.62V and 3.6V.
• VDDIN pin: Powers the Voltage regulator
• VDDOUT pin: It is the output of the voltage regulator.
• VDDBU pin: Powers the Slow Clock oscillator and a part of the System Controller; voltage
ranges from 1.62V and 3.6V. VDDBU must be supplied before or at the same time than
VDDIO and VDDCORE.
• VDDPLL pin: Powers the PLL A, UPLL and 3-20 MHz Oscillator; voltage ranges from 1.62V
and 1.95V.
• VDDUTMI pin: Powers the UTMI+ interface; voltage ranges from 3.0V and 3.6V, 3.3V
nominal.
• VDDANA pin: Powers the ADC cells; voltage ranges from 2.0V and 3.6V.
Ground pins GND are common to VDDCORE and VDDIO pins power supplies.
Separated ground pins are provided for VDDBU, VDDPLL, VDDUTMI and VDDANA. These
ground pins are respectively GNDBU, GNDPLL, GNDUTMI and GNDANA.
5.2
Voltage Regulator
The SAM3U embeds a voltage regulator that is managed by the Supply Controller.
This internal regulator is intended to supply the internal core of SAM3U but can be used to supply other parts in the application. It features two different operating modes:
• In Normal mode, the voltage regulator consumes less than 700 µA static current and draws
150 mA of output current. Internal adaptive biasing adjusts the regulator quiescent current
depending on the required load current. In Wait Mode or when the output current is low,
quiescent current is only 7µA.
• In Shutdown mode, the voltage regulator consumes less than 1 µA while its output is driven
internally to GND. The default output voltage is 1.80V and the start-up time to reach Normal
mode is inferior to 400 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 SAM3U supports a 1.62V-3.6V single supply mode. The internal regulator input connected
to the source and its output feeds VDDCORE. Figure 5-6 shows the power schematics.
15
6430BS–ATARM–01-Sep-09
Figure 5-1.
Single Supply
VDDBU
VDDUTMI
VDDANA
VDDIO
Main Supply (1.62V-3.6V)
VDDIN
Voltage
Regulator
VDDOUT
VDDCORE
VDDPLL
Note:
16
Restrictions
With Main Supply < 2.4 V, USB and ADC are not usable.
With Main Supply ≥ 2.4V and < 3V, USB is not usable.
With Main Supply ≥ 3V, all peripherals are usable.
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
Figure 5-2.
Core Externally Supplied
VDDBU
VDDUTMI
VDDANA
Main Supply (1.62V-3.6V)
VDDIO
VDDIN
Voltage
Regulator
VDDOUT
VDDCORE Supply (1.62V-1.95V) VDDCORE
VDDPLL
Note:
Restrictions
With Main Supply < 2.4 V, USB and ADC are not usable.
With Main Supply ≥ 2.4V and < 3V, USB is not usable.
With Main Supply ≥ 3V, all peripherals are usable.
17
6430BS–ATARM–01-Sep-09
Figure 5-3.
Backup Batteries Used
FWUP
SHDN
Backup Batteries VDDBU
VDDUTMI
VDDANA
VDDIO
VDDIN
Main Supply (1.62V-3.6V)
Voltage
Regulator
VDDOUT
VDDCORE
VDDPLL
Note:
18
Restrictions
With Main Supply < 2.4 V, USB and ADC are not usable.
With Main Supply ≥ 2.4V and < 3V, USB is not usable.
With Main Supply ≥ 3V, all peripherals are usable.
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
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 PLLA. 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 SAM3U are described below:
5.5.1
Backup Mode
The purpose of backup mode is to achieve the lowest power consumption possible in a system
which is performing periodic wake-ups to perform tasks but not requiring fast startup time
(<0.5ms).
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 SAM3U Series can be awakened from this mode through the Force Wake-Up pin (FWUP),
and Wake-Up input pins WUP0 to WUP15, Supply Monitor, RTT or RTC wake-up event. Current
Consumption is 2.5 µA typical on VDDBU.
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:
• FWUP pin (low level, configurable debouncing)
• WKUPEN0-15 pins (level transition, configurable debouncing)
• SM 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.
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 events or internal events in order to
wake-up the core (WFE). By configuring the external lines WUP0-15 as fast startup wake-up
pins (refer to Section 5.7 “Fast Start-Up”). RTC or RTT Alarm and USB wake-up events can be
used to wake up the CPU (exit from WFE).
Current Consumption in Wait mode is typically 15 µA on VDDIN if the internal voltage regulator
is used or 8 µA on VDDCORE if an external regulator is used.
19
6430BS–ATARM–01-Sep-09
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. 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
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
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
(VDDBU
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
ON
Powered
Clocked
+SLEEPDEEP WUP0-15 pins
back
RTC alarm
bit = 0
SHDN =1 (Not clocked)
+LPM bit = 1 RTT alarm
USB wake-up
Previous
state saved
Unchanged 8 µA/15 µA (5) < 10 µs
ON
Entry mode =WFI
Interrupt Only; Entry
mode =WFE Any
WFE or WFI Enabled Interrupt
ON
Powered(7) +SLEEPDEEP and/or Any Event
Clocked
from: Fast start-up
back
bit = 0
SHDN =1 (Not clocked)
through WUP0-15
+LPM bit = 0 pins
RTC alarm
RTT alarm
USB wake-up
Previous
state saved
Unchanged
ON
FWUP pin
WUP0-15 pins
OFF
OFF
+SLEEPDEEP BOD alarm
SHDN =0 (Not powered)
RTC alarm
bit = 1
RTT alarm
WFE
Reset
2.5 µA typ(4)
< 0.5 ms
WFE
Wait
Mode
Sleep
Mode
Notes:
(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. BOD current consumption is not included.
4. Current consumption on VDDBU.
5. 8 µA or VDDCORE, 15 µA on VDDIN.
6. Depends on MCK frequency.
7. In this mode the core is supplied and not clocked but some peripherals can be clocked.
21
6430BS–ATARM–01-Sep-09
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.
Figure 5-4.
Wake-up Source
SMEN
sm_int
RTCEN
rtc_alarm
Core
Supply
Restart
RTTEN
rtt_alarm
FWUPDBC
SLCK
FWUPEN
FWUP
WKUPT0
WKUP0
22
WKUPIS0
WKUPDBC
WKUPEN1
WKUPIS1
WKUPS
SLCK
Debouncer
Falling/Rising
Edge
Detector
WKUPT15
WKUP15
WKUPEN0
Falling/Rising
Edge
Detector
WKUPT1
WKUP1
FWUP
Debouncer
Falling
Edge
Detector
WKUPEN15
WKUPIS15
Falling/Rising
Edge
Detector
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
5.7
Fast Start-Up
The SAM3U 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.
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 4/8/12 MHz fast RC oscillator, switches the master clock on this 4/8/12 MHz clock and reenables the processor clock.
Figure 5-5.
Fast Start-Up Sources
USBEN
usb_wakeup
RTCEN
rtc_alarm
RTTEN
rtt_alarm
FSTT0
WKUP0
Falling/Rising
Edge
Detector
fast_restart
FSTT1
WKUP1
Falling/Rising
Edge
Detector
FSTT15
WKUP15
Falling/Rising
Edge
Detector
23
6430BS–ATARM–01-Sep-09
6. Input/Output Lines
The SAM3U has different kinds of input/output (I/O) lines, such as general purpose I/Os (GPIO)
and system I/Os. GPIOs can have alternate functions thanks to multiplexing capabilities of the
PIO controllers. The same GPIO line can be used whether it is in IO mode or used by the multiplexed peripheral. System I/Os are pins such as test pin, oscillators, erase pin, analog inputs or
debug pins.
With a few exceptions, the I/Os have input schmitt triggers. Refer to the footnotes associated
with “PIO Controller - PIOA - PIOB - PIOC” on page 6 within Table 3-1, “Signal Description List,”.
6.1
General Purpose I/O Lines (GPIO)
GPIO Lines are managed by PIO Controllers. All I/Os have several input or output modes such
as, pull-up, 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 SAM3U embeds high speed pads able to handle up to 65 MHz for HSMCI and SPI clock
lines and 35 MHz on other lines. See product AC Characteristics for more details. Typical pull-up
value is 100 kΩ for all I/Os.
Each I/O line also embeds an ODT (On-Die Termination), (see Figure 6-1 below). ODT consists
of an internal series resistor termination scheme for impedance matching between the driver
output (SAM3) and the PCB track impedance preventing signal reflection. The series resistor
helps to reduce IOs 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 reducing signal integrity issues.
Figure 6-1.
On-Die Termination schematic
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, flash erase and JTAG to name
but a few.
6.3
Serial Wire JTAG Debug Port (SWJ-DP)
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, “Signal Description List,”
24
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
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 GNDBU, 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.
All the JTAG signals are supplied with VDDIO except JTAGSEL, supplied by VDDBU.
6.4
Test Pin
The TST pin is used for JTAG Boundary Scan Manufacturing Test or fast flash programming
mode of the SAM3U 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.
6.5
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.
6.6
NRSTB Pin
The NRSTB pin is input only and enables asynchronous reset of the SAM3U when asserted low.
The NRSTB pin integrates a permanent pull-up resistor of about 15 kΩ. This allows connection
of a simple push button on the NRSTB pin as a system-user reset. In all modes, this pin will
reset the chip including the Backup region (RTC, RTT and Supply Controller). It reacts as the
Power-on reset. It can be used as an external system reset source. In harsh environments, it is
recommended to add an external capacitor (10 nF) between NRSTB and VDDBU. (For filtering
values refer to the I/O characteristics section of the product Electrical Characteristics.)
It embeds an anti-glitch filter.
6.7
ERASE Pin
The ERASE pin is used to reinitialize the Flash content and some of its NVM bits. It integrates a
permanent pull-down resistor of about 15 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 the reinitialization of the Flash.
Even in all low power modes, asserting the pin will automatically start-up the chip and erase the
Flash.
25
6430BS–ATARM–01-Sep-09
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 Bridges
The SAM3U product embeds two separated APB/AHB bridges:
• low speed bridge
• high speed bridge
This architecture enables to make concurrent accesses on both bridges.
All the peripherals are on the low-speed bridge except SPI, SSC and HSMCI.
The UART, 10-bit ADC (ADC), 12-bit ADC (ADC12B), TWI0-1, USART0-3, PWM have dedicated
channels for the Peripheral DMA Channels (PDC). These peripherals can not use the DMA
Controller.
The high speed bridge regroups the SSC, SPI and HSMCI. These three peripherals do not have
PDC channels but can use the DMA with the internal FIFO for Channel buffering.
Note that the peripherals of the two bridges are clocked by the same source: MCK.
7.3
Matrix Masters
The Bus Matrix of the SAM3U device manages 5 masters, which means that each master can
perform an access concurrently with others to an available slave.
Each master has its own decoder and specifically defined bus. In order to simplify the addressing, all the masters have the same decoding.
Table 7-1.
26
List of Bus Matrix Masters
Master 0
Cortex-M3 Instruction/Data
Master 1
Cortex-M3 System
Master 2
Peripheral DMA Controller (PDC)
Master 3
USB Device High Speed DMA
Master 4
DMA Controller
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
7.4
Matrix Slaves
The Bus Matrix of the SAM3U manages 10 slaves. Each slave has its own arbiter, allowing a different arbitration per slave.
Table 7-2.
7.5
List of Bus Matrix Slaves
Slave 0
Internal SRAM0
Slave 1
Internal SRAM1
Slave 2
Internal ROM
Slave 3
Internal Flash 0
Slave 4
Internal Flash 1
Slave 5
USB Device High Speed Dual Port RAM (DPR)
Slave 6
NAND Flash Controller RAM
Slave 7
External Bus Interface
Slave 8
Low Speed Peripheral Bridge
Slave 9
High Speed Peripheral Bridge
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 USB Device High speed DMA to the Internal Peripherals.
Thus, these paths are forbidden or simply not wired, and shown as “–” in Table 7-3 below.
Table 7-3.
SAM3U Master to Slave Access
Slaves
Masters
0
1
2
3
4
Cortex-M3
I/D Bus
Cortex-M3 S
Bus
PDC
USB Device
High Speed
DMA
DMA
Controller
0
Internal SRAM0
–
X
X
X
X
1
Internal SRAM1
–
X
X
X
X
2
Internal ROM
X
–
X
X
X
3
Internal Flash 0
X
–
–
–
–
4
Internal Flash 1
X
–
–
–
–
5
USB Device High Speed Dual Port RAM (DPR)
–
X
–
–
–
6
NAND Flash Controller RAM
–
X
X
X
X
7
External Bus Interface
–
X
X
X
X
8
Low Speed Peripheral Bridge
–
X
X
–
–
9
High Speed Peripheral Bridge
–
X
X
–
–
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6430BS–ATARM–01-Sep-09
7.6
DMA Controller
• Acting as one Matrix Master
• Embeds 4 channels:
– 3 channels with 8 bytes/FIFO for Channel Buffering
– 1 channel with 32 bytes/FIFO for Channel Buffering
• Linked List support with Status Write Back operation at End of Transfer
• Word, HalfWord, Byte transfer support.
• Handles high speed transfer of SPI, SSC and HSMCI (peripheral to memory, memory to
peripheral)
• Memory to memory transfer
• Can be triggered by PWM and T/C which enables to generate waveforms though the
External Bus Interface
The DMA controller can handle the transfer between peripherals and memory and so receives
the triggers from the peripherals listed below. The hardware interface numbers are also given in
Table 7-4 below.
Table 7-4.
7.7
DMA Controller
Instance name
Channel T/R
DMA Channel HW interface
Number
HSMCI
Transmit/Receive
0
SPI
Transmit
1
SPI
Receive
2
SSC
Transmit
3
SSC
Receive
4
PWM Event Line 0
Trigger
5
PWM Event Line 1
Trigger
6
TIO Output of TImer
Counter Channel 0
Trigger
7
Peripheral DMA Controller
•
Handles data transfer between peripherals and memories
•
Nineteen channels
•
–
Two for each USART
–
Two for the UART
–
Two for each Two Wire Interface
–
One for the PWM
–
One for each Analog-to-digital Converter
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
•
28
Next Pointer management for reducing interrupt latency requirement
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
The Peripheral DMA Controller handles transfer requests from the channel according to the following priorities (Low to High priorities):
Table 7-5.
7.8
Peripheral DMA Controller
Instance name
Channel T/R
TWI1
Transmit
TWI0
Transmit
PWM
Transmit
UART
Transmit
USART3
Transmit
USART2
Transmit
USART1
Transmit
USART0
Transmit
TWI0
Receive
TWI1
Receive
UART
Receive
USART3
Receive
USART2
Receive
USART1
Receive
USART0
Receive
ADC
Receive
ADC12B
Receive
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 break points and code patches
• Data Watchpoint and Trace (DWT) unit for implementing watch points, data tracing, and
system profiling
• Instrumentation Trace Macrocell (ITM) for support of printf style debugging
• IEEE® 1149.1 JTAG Boundary-scan on all digital pins
29
6430BS–ATARM–01-Sep-09
8. Product Mapping
Figure 8-1.
SAM3U Memory Mapping
0x00000000
Code
0x00000000
Address memory space
0x40000000
Code
0x40004000
Peripherals
MCI
Boot Memory
0x00080000
SSC
Internal Flash 0
0x00100000
0x40008000
0x20000000
SPI
Internal Flash 1
0x00180000
0x4000C000
Internal SRAM
0x40080000
0x40000000
0x00200000
Reserved
0x1FFFFFFF
1 MByte
bit band
region
+0x40
Peripherals
Internal SRAM
+0x80
0x60000000
SRAM0
0x20080000
TC1
TC2
TWI1
NFC (SRAM)
0x4008C000
Reserved
PWM
UDPHS (DMA)
0x20200000
0x40090000
0xE0000000
USART0
Undefined
0x22000000
0x40094000
System
32 MBytes
bit band alias
USART1
0x40098000
0xFFFFFFFF
USART2
Undefined
0x40000000
0x400E0000
System Controller
0x4009C000
USART3
SMC
0x400A0000
0x400E0200
20
External SRAM
PMC
0x400E0600
Chip Select 1
0x400E0740
0x61000000
UART
0x62000000
UDPHS
5
0x400A8000
8
0x400AC000
ADC12B
ADC
CHIPID
Chip Select 2
0x400B0000
0x400E0800
0x63000000
EFC0
Chip Select 3
0x400E0A00
0x64000000
EFC1
reserved
0x400E0C00
0x68000000
PIOA
NFC
0x400E0E00
reserved
0x400E1000
0x69000000
PIOB
0x9FFFFFFF
PIOC
0x400E1200
RSTC
ID
+0x10
DMAC
6
24
18
19
25
13
14
1 MByte
bit band
region
15
16
7
0x400E0000
10
0x400E2600
RTT
WDT
+0x60
RTC
SYSC
26
27
28
11
0x40100000
12
0x42000000
1
0x44000000
System Controller
Reserved
Reserved
32 MBytes
bit band alias
Reserved
SUPC
+0x50
0x400B3FFF
29
Reserved
0x60000000
+0x30
+0x90
23
0x400A4000
0x400E0400
Chip Select 0
22
Reserved
MATRIX
block
peripheral
TC0
TC0
0x40088000
0xA0000000
0x20180000
offset
TC0
TWI0
0x20100000
0x60000000
TC0
0x40084000
External SRAM
SRAM1
0x24000000
21
Reserved
Internal ROM
0x20000000
17
3
4
2
GPBR
0x400E1400
reserved
0x4007FFFF
30
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
9. Memories
The embedded and external memories are described below.
9.1
9.1.1
Embedded Memories
Internal SRAM
The SAM3U4 (256-KBytes internal Flash version) embeds a total of 48-Kbytes high-speed
SRAM (32-Kbytes SRAM0 and 16-Kbytes SRAM1).
The SAM3U2 (128-KBytes internal Flash version) embeds a total of 32-Kbytes high-speed
SRAM (16-Kbytes SRAM0 and 16-Kbytes SRAM1).
The SAM3U1 (64-KBytes internal Flash version) embeds a total of 16-Kbytes high-speed SRAM
(8-Kbytes SRAM0 and 8-Kbytes SRAM1).
The SRAM0 is accessible over System Cortex-M3 bus at address 0x2000 0000 and SRAM1 at
address 0x2008 0000. The user can see the SRAM as contiguous.
The SRAM0 and SRAM1 are in the bit band region. The bit band alias region is from 0x2200
0000 and 0x23FF FFFF.
The NAND Flash Controller embeds 4224 bytes of internal SRAM. If the NAND Flash controller
is not used, these 4224 Kbytes of SRAM can be used as general purpose. It can be seen at
address 0x2010 0000.
9.1.2
Internal ROM
The SAM3U product embeds an Internal ROM, which contains the SAM-BA Boot and FFPI
program.
At any time, the ROM is mapped at address 0x0018 0000.
9.1.3
9.1.3.1
Embedded Flash
Flash Overview
The Flash of the SAM3U4 (256-KBytes internal Flash version) is organized in two banks of 512
pages (dual plane) of 256 bytes.
The Flash of the SAM3U2 (128-KBytes internal Flash version) is organized in one bank of 512
pages (single plane) of 256 bytes.
The Flash of the is SAM3U1 (256-KBytes internal Flash version) organized in one bank of 256
pages (single plane) of 256 bytes.
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 within the Memory Controller 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.
31
6430BS–ATARM–01-Sep-09
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.
The SAM3U4 (256-KBytes internal Flash version) embeds two EEFC (EEFC0 for Flash0 and
EEFC1 for Flash1) whereas the SAM3U2/1 embeds one EEFC.
9.1.3.4
Lock Regions
In the SAM3U4 (256 KBytes internal Flash version) two Enhanced Embedded Flash Controllers
each manage 16 lock bits to protect 32 regions of the flash against inadvertent flash erasing or
programming commands.
The SAM3U4 (256 KBytes internal Flash version) contains 32 lock regions and each lock region
contains 32 pages of 256 bytes. Each lock region has a size of 8 Kbytes.
The SAM3U2 (128 KBytes internal Flash version) Enhanced Embedded Flash Controller manages 16 lock bits to protect 32 regions of the flash against inadvertent flash erasing or
programming commands.
The SAM3U2 (128 KBytes internal Flash version) contains 16 lock regions and each lock region
contains 32 pages of 256 bytes. Each lock region has a size of 8 Kbytes.
The SAM3U1(64 KBytes internal Flash version) Embedded Flash Controller manages 8 lock bits
to protect 8 regions of the flash against inadvertent flash erasing or programming commands.
The SAM3U1(64-KBytes internal Flash version) contains 8 lock regions and each lock region
contains 32 pages of 256 bytes. Each lock region has a size of 8 Kbytes.
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.
9.1.3.5
Security Bit Feature
The SAM3U 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, SRAM, Core Registers and Internal
Peripherals 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, and after a full Flash erase is performed. When the security bit is deactivated,
all accesses to the Flash, SRAM, Core Registers and Internal Peripherals either through the ICE
interface or through the Fast Flash Programming Interface 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.
32
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
9.1.3.6
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.
9.1.3.7
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.
9.1.3.8
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, NRSTB and FWUP pins are tied high during power up sequence and if all supplies
are provided externally (do not use internal regulator for VDDCORE). Please note that since the
FFPI is a part of the SAM-BA Boot Application, the device must boot from the ROM.
9.1.3.9
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 UART and USB.
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.
9.1.3.10
GPNVM Bits
The SAM3U 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.
The SAM3U4 is equipped with two EEFC, EEFC0 and EEFC1. EEFC1 does not feature the
GPNVM bits. The GPNVM embedded on EEFC0 applies to the two blocks in the SAM3U4.
Table 9-1.
9.1.4
General-purpose Non-volatile Memory Bits
GPNVMBit[#]
Function
0
Security bit
1
Boot mode selection
2
Flash selection (Flash 0 or Flash 1) Only on SAM3U4 (256 Kbytes internal
Flash version)
Boot Strategies
The system always boots at address 0x0. To ensure a maximum boot possibilities the memory
layout can be changed via GPNVM.
33
6430BS–ATARM–01-Sep-09
A general purpose NVM (GPNVM1) 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.
GPNVM2 enables to select if Flash 0 or Flash 1 is used for the boot. Setting the GPNVM2 bit
selects the boot from Flash 1, clearing it selects the boot from Flash 0.
9.2
External Memories
The SAM3U offers an interface to a wide range of external memories and to any parallel
peripheral.
9.2.1
Static Memory Controller
• 8- or 16- bit Data Bus
• Up to 24-bit Address Bus (up to 16 MBytes linear per chip select)
• Up to 4 chips selects, Configurable Assignment
• Multiple Access Modes supported
– Byte Write or Byte Select Lines
• Multiple device adaptability
– Control signals programmable setup, pulse and hold time for each Memory Bank
• Multiple Wait State Management
– Programmable Wait State Generation
– External Wait Request
– Programmable Data Float Time
• Slow Clock mode supported
9.2.2
NAND Flash Controller
• Handles automatic Read/Write transfer through 4224 bytes SRAM buffer
• DMA support
• Supports SLC NAND Flash technology
• Programmable timing on a per chip select basis
• Programmable Flash Data width 8-bit or 16-bit
9.2.3
NAND Flash Error Corrected Code Controller
• Integrated in the NAND Flash Controller
• Single bit error correction and 2-bit Random detection.
• Automatic Hamming Code Calculation while writing
– ECC value available in a register
• Automatic Hamming Code Calculation while reading
– Error Report, including error flag, correctable error flag and word address being
detected erroneous
34
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
– Supports 8- or 16-bit NAND Flash devices with 512-, 1024-, 2048- or 4096-byte
pages
35
6430BS–ATARM–01-Sep-09
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...
The System Controller User Interface also embeds the registers used to configure the Matrix.
See the system controller block diagram in Figure 10-1 on page 37.
36
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
Figure 10-1. System Controller Block Diagram
VDDBU
VDDIN
vr_standby
Software Controlled
Voltage Regulator
FWUP
VDDOUT
SHDN
WKUP0 - WKUP15
NRSTB
Supply
Controller
VDDIO
PIOA/B/C
Input / Output Buffers
Zero-Power
Power-on Reset
PIOx
VDDANA
General Purpose
Backup Registers
ADVREF
ADC (front-end)
ADx
SLCK
RTC
rtc_alarm
bodbup_in
SLCK
RTT
VDDUTMI
Supply
Monitor
bodbup_on
rtt_alarm
USBx
USB
osc32k_xtal_en
VDDCORE
vddcore_nreset
XIN32
XTALSEL
Xtal 32 kHz
Oscillator
XOUT32
Embedded
32 kHz RC
Oscillator
Slow Clock
SLCK
bodcore_on
Brownout
Detector
bodcore_in
supc_interrupt
osc32k_rc_en
SRAM
Backup Power Supply
Peripherals
vddcore_nreset
proc_nreset
periph_nreset
ice_nreset
Reset
Controller
NRST
Cortex-M3
Matrix
Peripheral
Bridge
FSTT0 - FSTT15(1)
Embedded
12 / 8 / 4 MHz
RC
Oscillator
XIN
Main Clock
MAINCK
3 - 20 MHz
XTAL Oscillator
XOUT
MAINCK
PLLACK
PLLA
MAINCK
Flash
SLCK
Power
Management
Controller
Master Clock
MCK
SLCK
Watchdog
Timer
UPLLCK
UPLL
Core Power Supply
FSTT0 - FSTT15 are possible Fast Startup Sources, generated by WKUP0-WKUP15 Pins,
but are not physical pins.
37
6430BS–ATARM–01-Sep-09
10.1
System Controller and Peripheral Mapping
Please refer to Figure 8-1“SAM3U Memory 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 SAM3U embeds three features to monitor, warn and/or reset the chip:
• Power-on-Reset on VDDBU
• Brownout Detector on VDDCORE
• Supply Monitor on VDDUTMI
10.2.1
Power-on-Reset on VDDBU
The Power-on-Reset monitors VDDBU. It is always activated and monitors voltage at start up
but also during power down. If VDDBU 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 VDDUTMI
The Supply Monitor monitors VDDUTMI. It is not active 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 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 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.
10.4
Supply Controller
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.
The reset circuitry is based on a zero-power power-on reset cell. The zero-power power-on reset
allows the Supply Controller to start properly.
38
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
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 enabling 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 32768 Hz Slow Clock Oscillator with bypass mode
• One Low Power RC Oscillator
• One 3 to 20 MHz Crystal 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. 8 MHz and 12 MHz output are factory calibrated.
• One 480 MHz UPLL providing a clock for the USB High Speed Device Controller. Input
frequency is 12 MHz (only).
• One 96 to 192 MHz programmable PLL (PLL A), capable to provide the clock MCK to the
processor and to the peripherals. The input frequency of the PLL A is between 8 and 16 MHz.
Figure 10-2. Clock Generator Block Diagram
Clock Generator
XTALSEL
On Chip
32k RC OSC
XIN32
XOUT32
XIN
Slow Clock
SLCK
Slow Clock
Oscillator
12M Main
Oscillator
Main Clock
MAINCK
XOUT
On Chip
12/8/4 MHz
RC OSC
MAINSEL
PLL B
HSCK
Divider
/6 /8
UPLL Clock
UPLLCK
PLL and
Divider A
PLLA Clock
PLLACK
Status
Control
Power
Management
Controller
39
6430BS–ATARM–01-Sep-09
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
• the USB Device HS Clock UDPCK
• 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.
Figure 10-3.
Power Management Controller Block Diagram
Processor
Clock
Controller
HCK
int
Sleep Mode
Divider
/8
SystTick
FCLK
Master Clock Controller
SLCK
MAINCK
PLLACK
PLLBCK
Prescaler
/1,/2,/4,...,/64
MCK
Peripherals
Clock Controller
periph_clk[..]
ON/OFF
Programmable Clock Controller
SLCK
MAINCK
PLLACK
PLLBCK
ON/OFF
Prescaler
/1,/2,/4,...,/64
pck[..]
USB Clock Controller
ON/OFF
HSCK
UDPCK
The SysTick calibration value is fixed at 10500, which allows the generation of a time base of
1 ms with SystTick clock to 10.5 MHz (max HCLK/8).
40
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
10.7
Watchdog Timer
• 16-bit key-protected once-only Programmable Counter
• Windowed, prevents the processor to be in a dead-lock on the watchdog access
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
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 Back-up Registers
• Eight 32-bit general-purpose backup registers
10.12 Nested Vectored Interrupt Controller
• Thirty maskable interrupts
• Sixteen priority levels
• Dynamic reprioritization of interrupts
• Priority grouping
– selection of preempting interrupt levels and non preempting 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.
41
6430BS–ATARM–01-Sep-09
10.13 Chip Identification
• Chip Identifier (CHIPID) registers permit recognition of the device and its revision.
Table 10-1.
SAM3U Chip IDs Register
Chip Name
Flash Size
KByte
Pin Count
CHIPID_CIDR
CHIPID_EXID
SAM3U4C (Rev A)
256
100
0x28000960
0x0
SAM3U2C (Rev A)
128
100
0x280A0760
0x0
SAM3U1C (Rev A)
64
100
0x28090560
0x0
SAM3U4E (Rev A)
256
144
0x28100960
0x0
SAM3U2E (Rev A)
128
144
0x281A0760
0x0
SAM3U1E (Rev A)
64
144
0x28190560
0x0
• JTAG ID: 0x0582A03F
42
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6430BS–ATARM–01-Sep-09
SAM3U Series
10.14 PIO Controllers
• 3 PIO Controllers, PIOA, PIOB, and PIOC, controlling a maximum of 96 I/O Lines
• Each PIO Controller controls up to 32 programmable I/O Lines
– PIOA has 32 I/O Lines
– PIOB has 32 I/O Lines
– PIOC has 32 I/O Lines
• Fully programmable through Set/Clear Registers
• Multiplexing of two 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
– 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
• Synchronous output, provides Set and Clear of several I/O lines in a single write
43
6430BS–ATARM–01-Sep-09
11. Peripherals
11.1
Peripheral Identifiers
Table 11-1 defines the Peripheral Identifiers of the SAM3U. 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.
Note that some Peripherals are always clocked. Please refer to the table below.
Table 11-1.
44
Peripheral Identifiers
PMC
Clock Control
Instance ID
Instance Name
NVIC
Interrupt
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
EEFC0
X
Enhanced Embedded Flash Controller 0
7
EEFC1
X
Enhanced Embedded Flash Controller 1
8
UART
X
X
Universal Asynchronous Receiver Transmitter
9
SMC
X
X
Static Memory Controller
10
PIOA
X
X
Parallel I/O Controller A,
11
PIOB
X
X
Parallel I/O Controller B
12
PIOC
X
X
Parallel I/O Controller C
13
USART0
X
X
USART 0
14
USART1
X
X
USART 1
15
USART2
X
X
USART 2
16
USART3
X
X
USART 3
17
HSMCI
X
X
High Speed Multimedia Card Interface
18
TWI0
X
X
Two-Wire Interface 0
19
TWI1
X
X
Two-Wire Interface 1
20
SPI
X
X
Serial Peripheral Interface
21
SSC
X
X
Synchronous Serial Controller
22
TC0
X
X
Timer Counter 0
23
TC1
X
X
Timer Counter 1
24
TC2
X
X
Timer Counter 2
25
PWM
X
X
Pulse Width Modulation Controller
26
ADC12B
X
X
12-bit ADC Controller
27
ADC
X
X
10-bit ADC Controller
28
DMAC
X
X
DMA Controller
29
UDPHS
X
X
USB Device High Speed
Instance Description
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
11.2
Peripheral Signal Multiplexing on I/O Lines
The SAM3U features 3 PIO controllers, PIOA, PIOB and PIOC that multiplex the I/O lines of the
peripheral set.
Each PIO Controller controls up to 32 lines. Each line can be assigned to one of two peripheral
functions, A or B. The multiplexing tables in the following pages define how the I/O lines of
peripherals A and B are multiplexed on the PIO Controllers. The two columns “Extra Function”
and “Comments” have been inserted in this table for the user’s own comments, they 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.
45
6430BS–ATARM–01-Sep-09
11.2.1
PIO Controller A Multiplexing
Table 11-2.
I/O Line
Multiplexing on PIO Controller A (PIOA)
Peripheral A
Peripheral B
Extra Function
PA0
TIOB0
NPCS1
WKUP0
PA1
TIOA0
NPCS2
WKUP1(1)(2)
PA2
TCLK0
AD12BTRG
WKUP2(1)(2)
PA3
MCCK
PCK1
PA4
MCCDA
PWMH0
PA5
MCDA0
PWMH1
PA6
MCDA1
PWMH2
PA7
MCDA2
PWML0
PA8
MCDA3
PWML1
PA9
TWD0
PWML2
WKUP3(1)(2)
PA10
TWCK0
PWML3
WKUP4(1)(2)
PA11
URXD
PWMFI0
PA12
UTXD
PWMFI1
PA13
MISO
PA14
MOSI
PA15
SPCK
PWMH2
PA16
NPCS0
NCS1
WKUP5(1)(2)
PA17
SCK0
ADTRG
WKUP6(1)(2)
PA18
TXD0
PWMFI2
WKUP7(1)(2)
PA19
RXD0
NPCS3
WKUP8(1)(2)
PA20
TXD1
PWMH3
WKUP9(1)(2)
PA21
RXD1
PCK0
WKUP10(1)(2)
PA22
TXD2
RTS1
AD12B0
PA23
RXD2
CTS1
PA24
TWD1
SCK1
WKUP11(1)(2)
PA25
TWCK1
SCK2
WKUP12(1)(2)
PA26
TD
TCLK2
PA27
RD
PCK0
PA28
TK
PWMH0
PA29
RK
PWMH1
PA30
TF
TIOA2
PA31
RF
TIOB2
Notes:
Comments
(1)(2)
AD12B1
1. Wake-Up source in Backup mode (managed by the SUPC).
2. Fast Start-Up source in Wait mode (managed by the PMC).
46
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
11.2.2
PIO Controller B Multiplexing
Table 11-3.
Multiplexing on PIO Controller B (PIOB)
I/O Line
Peripheral A
Peripheral B
Extra Function
Comments
(1)(2)
PB0
PWMH0
A2
WKUP13
PB1
PWMH1
A3
WKUP14(1)(2)
PB2
PWMH2
A4
WKUP15(1)(2)
PB3
PWMH3
A5
AD12B2
PB4
TCLK1
A6
AD12B3
PB5
TIOA1
A7
AD0
PB6
TIOB1
D15
AD1
PB7
RTS0
A0/NBS0
AD2
PB8
CTS0
A1
AD3
PB9
D0
DTR0
PB10
D1
DSR0
PB11
D2
DCD0
PB12
D3
RI0
PB13
D4
PWMH0
PB14
D5
PWMH1
PB15
D6
PWMH2
PB16
D7
PWMH3
PB17
NANDOE
PWML0
PB18
NANDWE
PWML1
PB19
NRD
PWML2
PB20
NCS0
PWML3
PB21
A21/NANDALE
RTS2
PB22
A22/NANDCLE
CTS2
PB23
NWR0/NWE
PCK2
PB24
NANDRDY
PCK1
PB25
D8
PWML0
Only on 144-pin version
PB26
D9
PWML1
Only on 144-pin version
PB27
D10
PWML2
Only on 144-pin version
PB28
D11
PWML3
Only on 144-pin version
PB29
D12
Only on 144-pin version
PB30
D13
Only on 144-pin version
PB31
D14
Only on 144-pin version
Notes:
1. Wake-Up source in Backup mode (managed by the SUPC).
2. Fast Start-Up source in Wait mode (managed by the PMC).
47
6430BS–ATARM–01-Sep-09
11.2.3
PIO Controller C Multiplexing
Table 11-4.
Multiplexing on PIO Controller C (PIOC)
I/O Line
Peripheral A
Peripheral B
Extra function
Comments
PC0
A2
Only on 144-pin version
PC1
A3
Only on 144-pin version
PC2
A4
Only on 144-pin version
PC3
A5
NPCS1
Only on 144-pin version
PC4
A6
NPCS2
Only on 144-pin version
PC5
A7
NPCS3
Only on 144-pin version
PC6
A8
PWML0
Only on 144-pin version
PC7
A9
PWML1
Only on 144-pin version
PC8
A10
PWML2
Only on 144-pin version
PC9
A11
PWML3
Only on 144-pin version
PC10
A12
CTS3
Only on 144-pin version
PC11
A13
RTS3
Only on 144-pin version
PC12
NCS1
TXD3
Only on 144-pin version
PC13
A2
RXD3
Only on 144-pin version
PC14
A3
NPCS2
Only on 144-pin version
PC15
NWR1/NBS1
PC16
NCS2
PC17
AD12B4
Only on 144-pin version
AD12B5
Only on 144-pin version
NCS3
AD12B6
Only on 144-pin version
PC18
NWAIT
AD12B7
Only on 144-pin version
PC19
SCK3
PC20
A14
Only on 144-pin version
PC21
A15
Only on 144-pin version
PC22
A16
Only on 144-pin version
PC23
A17
Only on 144-pin version
PC24
A18
PWMH0
Only on 144-pin version
PC25
A19
PWMH1
Only on 144-pin version
PC26
A20
PWMH2
Only on 144-pin version
PC27
A23
PWMH3
Only on 144-pin version
PC28
PWML3
NPCS1
Only on 144-pin version
MCDA4
AD4
Only on 144-pin version
PC29
PWML0
MCDA5
AD5
Only on 144-pin version
PC30
PWML1
MCDA6
AD6
Only on 144-pin version
PC31
PWML2
MCDA7
AD7
Only on 144-pin version
Notes:
1. Wake-Up source in Backup mode (managed by the SUPC).
2. Fast Start-Up source in Wait mode (managed by the PMC).
48
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
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
– 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
– Support for two PDC channels with connection to receiver and transmitter
49
6430BS–ATARM–01-Sep-09
12.4
Universal Synchronous Asynchronous Receiver Transmitter (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
– Optional Manchester Encoding
• RS485 with driver control signal
• ISO7816, T = 0 or T = 1 Protocols for interfacing with smart cards
– 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
– Communication at up to 115.2 Kbps
• Test Modes
– Remote Loopback, Local Loopback, Automatic Echo
12.5
Serial Synchronous Controller (SSC)
• Provides serial synchronous communication links used in audio and telecom applications
(with CODECs in Master or Slave Modes, I2S, TDM Buses, Magnetic Card Reader, ...)
• Contains an independent receiver and transmitter and a common clock divider
• Offers a configurable frame sync and data length
• Receiver and transmitter can be programmed to start automatically or on detection of
different event on the frame sync signal
• Receiver and transmitter include a data signal, a clock signal and a frame synchronization
signal
12.6
Timer Counter (TC)
• Three 16-bit Timer Counter Channels
• Wide range of functions including:
– Frequency Measurement
– Event Counting
– Interval Measurement
50
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
– Pulse Generation
– Delay Timing
– Pulse Width Modulation
– Up/Down Capabilities
– Quadrature Decoder Logic
• Each channel is user-configurable and contains:
– Three external clock inputs
– Five internal clock inputs
– Two multi-purpose input/output signals
• Two global registers that act on all three TC Channels
12.7
Pulse Width Modulation Controller (PWM)
• 4 channels, one 16-bit counter per channel
• Common clock generator, providing Thirteen Different Clocks
– A Modulo n counter providing eleven clocks
– Two independent Linear Dividers working on modulo n counter outputs
– High Frequency Asynchronous clocking mode
• 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
– Programmable center or left aligned output waveform
– Independent Output Override for each channel
– Independent complementary Outputs with 12-bit dead time generator for each
channel
– Independent Enable Disable Commands
– Independent Clock Selection
– Independent Period and Duty Cycle, with Double Buffering
• Synchronous Channel mode
– Synchronous Channels share the same counter
– Mode to update the synchronous channels registers after a programmable number
of periods
• Connection to one PDC channel
– Offers Buffer transfer without Processor Intervention, to update duty cycle of
synchronous channels
• Two independent event lines which can send up to 8 triggers on ADC within a period
• Four programmable Fault Inputs providing asynchronous protection of outputs
51
6430BS–ATARM–01-Sep-09
12.8
High Speed Multimedia Card Interface (HSMCI)
• Compatibility with MultiMedia Card Specification Version 4.3
• Compatibility with SD Memory Card Specification Version 2.0
• Compatibility with SDIO Specification Version V2.0.
• Compatibility with CE-ATA Specification 1.1
• Cards clock rate up to Master Clock divided by 2
• Boot Operation Mode support
• High Speed mode support
• Embedded power management to slow down clock rate when not used
• HSMCI has one slot supporting
– One MultiMediaCard bus (up to 30 cards) or
– One SD Memory Card
– One SDIO Card
• Support for stream, block and multi-block data read and write
• Supports Connection to DMA controller
– Minimizes Processor intervention for large buffer transfers
• Built in FIFO (32 bytes) with large Memory Aperture Supporting Incremental access
• Support for CE-ATA Completion Signal Disable Command
12.9
USB High Speed Device Port (UDPHS)
• USB V2.0 high-speed compliant, 480 MBits per second
• Embedded USB V2.0 UTMI+ high-speed transceiver
• Embedded 4-Kbyte dual-port RAM for endpoints
• Embedded 6 channels DMA controller
• Suspend/Resume logic
• Up to 2 or 3 banks for isochronous and bulk endpoints
• Seven endpoints, configurable by software
• Maximum configuration: seven endpoints:
– Endpoint 0: 64 bytes, 1 bank mode
– Endpoint 1 & 2: 512 bytes, 2 banks mode, HS isochronous capable
– Endpoint 3 & 4:64 bytes, 3 banks mode
– Endpoint 5 & 6: 1024 bytes, 3 banks mode, HS isochronous capable
12.10 Analog-to-Digital Converter (ADC)
Two ADCs are embedded in the product.
12.10.1
12-bit High Speed ADC
• 8-channel ADC
• 12-bit 1 Msamples/sec. Cyclic Pipeline ADC
• Integrated 8-to-1 multiplexer
• 12-bit resolution
52
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
• Selectable single ended or differential input voltage
• Programmable gain for maximum full scale input range
• External voltage reference for better accuracy on low voltage inputs
• Individual enable and disable of each channel
• Multiple trigger sources
– Hardware or software trigger
– External trigger pin
– Timer Counter 0 to 2 outputs TIOA0 to TIOA2 trigger
– PWM trigger
• Sleep Mode and conversion sequencer
– Automatic wakeup on trigger and back to sleep mode after conversions of all
enabled channels
12.10.2
10-bit Low Power ADC
• 8-channel ADC
• 10-bit 384 Ksamples/sec. or 8-bit 533 Ksamples/sec. Successive Approximation Register
ADC
• -2/+2 LSB Integral Non Linearity, -1/+1 LSB Differential Non Linearity
• Integrated 8-to-1 multiplexer
• External voltage reference for better accuracy on low voltage inputs
• Individual enable and disable of each channel
• Multiple trigger sources
– Hardware or software trigger
– External trigger pin
– Timer Counter 0 to 2 outputs TIOA0 to TIOA2 trigger
– PWM trigger
• Sleep Mode and conversion sequencer
– Automatic wakeup on trigger and back to sleep mode after conversions of all
enabled channels
53
6430BS–ATARM–01-Sep-09
13. Package Drawings
Figure 13-1. 100-ball LQFP Package Mechanical Drawing
54
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
Figure 13-2. 100-ball LFBGA Package Mechanical Drawing
55
6430BS–ATARM–01-Sep-09
Figure 13-3. 144-lead LQFP Package Mechanical Drawing
Notes:
1. This drawing is for general information only; refer to JEDEe Drawing MS-026 for additional information.
2. The top package body size may be smaller than the bottom package size by as much as 0.15 mm.
3. Dimensions D1 and E1 do not include mold protrusions. Allowable protrusion is 0.25 mm per side. D1 and E1 are maximum
plastic body size dimensions including mold mismatch.
4. b dimension by more than 0.08 mm. Dambar cannot be located on the lower radius or the foot. Minimum space between protrusion and an adjacent lead is 0.07 mm for 0.4 and 0.5 mm pitch packages.
5. These dimensions apply to the flat section of the lead between 0.10 mm and 0.25 mm from the lead tip.
6. A1 is defined as the distance from the seating place to the lowest point on the package body.
56
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
Figure 13-4. 144-ball LFBGA Mechanical Drawing
All dimensions are in mm.
57
6430BS–ATARM–01-Sep-09
14. Ordering Information
Table 14-1.
ATSAM3U4/2/1 Ordering Information
Ordering Code
MRL
Flash
(Kbytes)
Package
Package Type
ATSAM3U4EA-AU
A
256
LQFP144
Green
Industrial
-40°C to 85°C
ATSAM3U4EA-CU
A
256
LFBGA 144
Green
Industrial
-40°C to 85°C
ATSAM3U4CA-AU
A
256
LQFP 100
Green
Industrial
-40°C to 85°C
ATSAM3U4CA-CU
A
256
TFBGA100
Green
Industrial
-40°C to 85°C
ATSAM3U2EA-AU
A
128
LQFP144
Green
Industrial
-40°C to 85°C
ATSAM3U2EA-CU
A
128
LFBGA144
Green
Industrial
-40°C to 85°C
ATSAM3U2CA-AU
A
128
LQFP100
Green
Industrial
-40°C to 85°C
ATSAM3U2CA-CU
A
128
TFBGA100
Green
Industrial
-40°C to 85°C
ATSAM3U1EA-AU
A
64
LQFP144
Green
Industrial
-40°C to 85°C
ATSAM3U1EA-CU
A
64
LFBGA144
Green
Industrial
-40°C to 85°C
ATSAM3U1CA-AU
A
64
LQFP100
Green
Industrial
-40°C to 85°C
ATSAM3U1CA-CU
A
64
TFBGA100
Green
Industrial
-40°C to 85°C
58
Temperature
Operating Range
SAM3U Series
6430BS–ATARM–01-Sep-09
SAM3U Series
Revision History
In the tables that follow, the most recent version of the document appears first.
“rfo” indicates changes requested during the review and approval loop.
Doc Rev
6430B
Comments
Change
Request
Ref.
Introduction:
Section 1. ”SAM3U Description”, Updated: 52 Kbytes of SRAM. 4x USARTs (SAM3U1C/2C/4C have 3), up to 6400
2x TWIs (SAM3U1C/2C/4C have 1), up to 5x SPIs SAM3U1C/2C/4C have 4),
Table 1-1, “Configuration Summary”,EBI column updated, 8 bits for SAM3U1C/2C/4C
SAM3U4/3/2C rows FWUP replaces NO in FWUP,SHDN pins column
6642
Figure 2-1 ”144-pin SAM3U4/2/1E Block Diagram” and Figure 2-2 ”100-pin SAM3U4/2/1C Block Diagram”
updated, SM cell removed; UART moved to peripheral area, added Flash Unique block, removed 12B from
ADC block, added SysTick counter and Fmax 96 MHz to M3 block. FWUP replaces WKUP in fig 2-1, FWUP
added to fig 2-2
Figure 2-2 ”100-pin SAM3U4/2/1C Block Diagram”, NWR1/NBS1, NXRP0, A0 removed from block diagram.
6482/6642
Table 3-1, “Signal Description List”, Schmitt Trigger added ”PIO Controller - PIOA - PIOB - PIOC”. exception
details given in footnote.
VDDIN, VDDOUT added to table.
”Serial Wire/JTAG Debug Port (SWJ-DP)” replaced ICE and JTAG. This section of the table updated
status of pulldowns and pullups specified.
6480
Section 4. ”Package and Pinout”, reorganized according to product.
Section 4.1 ”SAM3U4/2/1E Package and Pinout” and Section 4.2 ”SAM3U4/2/1C Package and Pinout”,
pinouts finalized in datasheet.
6471/rfo
6607
Section 5.5.1 ”Backup Mode”, BOD replaced by Supply Monitor/SM. FWUP →Falling Edge Detector.
Figure 5-4 ”Wake-up Source”, BODEN replaced by SMEN.
Table 5-1, “Low Power Mode Configuration Summary”, PIO state in Low Power Modes, backup mode is;
“Previous state saved.
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Section 6.6 ”NRSTB Pin”, VDDIO changed to VDDBU
Section 6. ”Input/Output Lines”, replaces Section 5.8 “Programmable I/O Lines”.
Section 6.1 ”General Purpose I/O Lines (GPIO)” and Section 6.2 ”System I/O Lines”, replace Section 6. “I/O
Line Considerations”.
Figure 6-1 ”On-Die Termination schematic”, added.
Section 6.8 “PIO Controllers”, removed.
Section 8. ”Product Mapping”, title changed from “Memories”.
Section 9. ”Memories”, now comprises Section 9.1 ”Embedded Memories” and Section 9.2 ”External
Memories”.
Section 9.1.3.5 ”Security Bit Feature”, updated
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Table 7-3, “SAM3U Master to Slave Access”, Slave 9, High Speed Peripheral Bridge line added.
Section 7.2 ”APB/AHB Bridges”, reference to ADC updated “10-bit ADC, 12-bit ADC (ADC12B)”.
Table 11-3, “Multiplexing on PIO Controller B (PIOB)”, ADC12B2, ADC12B3 properly listed.
Section 12.10.1 ”12-bit High Speed ADC”, Section 12.10.2 ”10-bit Low Power ADC”, titles changed.
“Quadrature Decoder Logic” on page 51, properly stated in list of TC functions.
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Section 12.10.1 ”12-bit High Speed ADC”, 2nd item on list updated.
Section 12.10.2 ”10-bit Low Power ADC”, Ksample values updated on 2nd item of list.
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Comments
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First issue
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6430BS–ATARM–01-Sep-09
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