SAM3U Datasheet, PDF (2/59 Pages) ATMEL Corporation – AT91SAM ARM-based Flash MCU

1. SAM3U Description
Atmel's SAM3U series is a member of a family of Flash microcontrollers based on the high per-
formance 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 4xUSARTs
(SAM3U1C/2C/4C have 3), up to 2xTWIs (SAM3U1C/2C/4C have 1), up to 5xSPIs
SAM3U1C/2C/4C have 4), as well as 4xPWM timers, 3xgeneral 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.
Device
SAM3U4E
SAM3U2E
SAM3U1E
SAM3U4C
SAM3U2C
SAM3U1C
Configuration Summary
Flash
Number
FWUP,
Flash
Number of
Number SHDN
Organization SRAM of PIOs USARTs of TWI pins
2x128
Kbytes
dual plane
52
Kbytes
96
4
2
Yes
128
Kbytes
single plane
36
Kbytes
96
4
2
Yes
64
Kbytes
single plane
20
Kbytes
96
4
2
Yes
2 x 128
Kbytes
dual plane
52
Kbytes
57
3
1
FWUP
128
Kbytes
single plane
36
Kbytes
57
3
1
FWUP
64
Kbytes
single plane
20
Kbytes
57
3
1
FWUP
External Bus
Interface
HSMCI
data
size Package
8 or 16 bits,
4 chip selects,
24-bit address
8 bits
LQFP144
BGA144
8 or 16 bits,
4 chip selects
24-bit address
8 bits
LQFP144
BGA144
8 or 16 bits,
4 chip selects,
24-bit address
8 bits
LQFP144
BGA144
8 bits,
2 chip selects,
8-bit address
4 bits
LQFP100
BGA100
8 bits,
2 chip selects, 8- 4 bits
bit address
LQFP100
BGA100
8 bits
2 chip selects,
8-bit address
4 bits
LQFP100
BGA100
ADC
2 (8+ 8
channels)
2 (8+ 8
channels)
2 (8+ 8
channels)
2 (4+ 4
channels)
2 (4+ 4
channels)
2 (4+ 4
channels)
Note: 1. The SRAM size takes into account the 4-Kbyte RAM buffer of the NAND Flash Controller (NFC) which can be used by the
core if not used by the NFC.
2 SAM3U Series
6430ES–ATARM–22-Aug-11