SAM3U1C Atmel Corporation, SAM3U1C Datasheet - Page 1160

• Manufacturer Part Number: SAM3U1C
• Manufacturer: Atmel Corporation

Specifications of SAM3U1C

• Flash (kbytes): 64 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 96 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 28
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 57
• Ext Interrupts: 57
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device
• Spi: 4
• Twi (i2c): 1
• Uart: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 20
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

46.2
46.2.1
46.2.1.1
46.2.1.2
46.2.1.3
46.2.1.4
1160
SAM3U Errata - Rev. A Parts
SAM3U Series
Flash
Flash: Issue Running at Frequency Lower than 2.5 MHz
Flash: Read Flash in 64-bit Mode
Flash: Flash Programming
Flash: Fetching Error after Reading the Unique Identifier
Revision A parts Chip IDs are as follows:
SAM3U4C (Rev A)
SAM3U2C (Rev A)
SAM3U1C (Rev A)
SAM3U4E (Rev A)
SAM3U2E (Rev A)
SAM3U1E (Rev A)
Refer also to
When the system clock (MCK) is lower than 2.5 MHz with 2 Wait States (WS) programmed in
the EEFC Flash Mode Register (EEFC_FMR), the Cortex fetches erroneous instructions.
Do not use 2 WS when running at a frequency lower than 2.5 MHz.
Higher than expected power consumption can be seen when reading Flash in 64-bit mode.
Use 128-bit mode instead.
When writing data into the Flash memory plane (either through the EEFC, using the IAP func-
tion, or FFPI), the data may not be correctly written (i.e the data written is not the one expected).
Set the number of Wait States (WS) to 6 (FWS=6) during the programming.
After reading the Unique Identifier (or using the STUI/SPUI command), the processor may fetch
wrong instructions. It depends on the code and on the region of the code.
In order to avoid this problem, follow the steps below:
Note:
1. Set bit 16 of EEFC Flash Mode Register to 1
2. Send the Start Read Unique Identifier command (STUI) by writing the Flash Command
3. Wait for the FRDY bit to fall
4. Read the Unique ID (and next bits if required)
5. Send the Stop Read Unique Identifier command (SPUI) by writing the Flash Command
6. Wait for the FRDY bit to rise
7. Clear bit 16 of EEFC Flash Mode Register
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Register with the STUI command.
Register with the SPUI command.
During the sequence, the software cannot run out of Flash (so needs to run out of SRAM).
Section 46.1 “Marking” on page 1159
0x28000961
0x280A0761
0x28090561
0x28100961
0x281A0761
0x28190561
6430E–ATARM–29-Aug-11