ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 1150

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

46.2
46.2.1
46.2.1.1
46.2.1.2
46.2.1.3
46.2.2
46.2.2.1
1150
SAM3U Errata - Rev. A Parts
SAM3U Series
Flash
12-bit Analog-to-Digital Converter (ADC12B)
Flash: Issue Running at Frequency Lower than 2.5 MHz
Flash: Read Flash in 64-bit Mode
Flash: Flash Programming
ADC12B: Current Consumption in Backup Mode on VDDANA
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.
In Backup mode, the current consumption on VDDANA is around 1.0 mA instead of 0.1 μA
Four workarounds are possible:
1. Do not supply VDDANA and VDDIO in Backup mode using an external switch managed
2. Do not supply VDDANA in Backup mode using an external switch managed by the
3. Do not supply VDDANA in Backup mode using an external switch managed by any PIO
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
by SHDN pin.
SHDN and set all PIOs with ADC inputs (PA22, PA30, PB3-PB8, PC15-PC18, PC28-
C21) at low level (either externally or by software).
and set all PIOs with ADC inputs (PA22, PA30, PB3-PB8, PC15-PC18, PC28-C21) at
low level (either externally or by software). Since the PIO state is preserved when in
backup mode, any free PIO line can be used to switch off the external switch by driving
the PIO line at low level (PIO is input, pull-up enabled after backup reset).
Section 46.1 “Marking” on page 1149
0x28000961
0x280A0761
0x28090561
0x28100961
0x281A0761
0x28190561
6430D–ATARM–25-Mar-11