ATSAM3U4CA-CU Atmel, ATSAM3U4CA-CU Datasheet - Page 290

• Manufacturer Part Number: ATSAM3U4CA-CU
• Description: IC MCU 32BIT 256KB FLSH 100TFBGA
• Manufacturer: Atmel
• Series: SAM3Ur

Specifications of ATSAM3U4CA-CU

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 96MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 57
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 52K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 4x10b, 4x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFBGA
• Processor Series: ATSAM3x
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Data Ram Size: 52 KB
• Interface Type: 3xUSART, TWI, 4xSPI, Bus
• Maximum Clock Frequency: 96 MHz
• Number Of Programmable I/os: 57
• Number Of Timers: 8
• Operating Supply Voltage: 1.62 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-CM3, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: ATSAM3U-EK
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

19.3.6
19.3.6.1
Figure 19-5. Raising the VDDUTMI Power Supply
290
Zero-Power Power-On
Backup Power Supply
Reset Cell output
Core Power Supply
Oscillator output
Oscillator output
22 - 42 kHz RC
vddcore_nreset
SHDN / vr_on
periph_nreset
Fast RC
proc_nreset
bodcore_in
SAM3U Series
Backup Power Supply Reset
Raising the Backup Power Supply
NRST
Note: After “proc_nreset” rising, the core starts fecthing instructions from Flash at 4 MHz.
As soon as the backup voltage VDDUTMI rises, the RC oscillator is powered up and the zero-
power power-on reset cell maintains its output low as long as VDDUTMI has not reached its tar-
get voltage. During this time, the Supply Controller is entirely reset. When the VDDUTMI voltage
becomes valid and zero-power power-on reset signal is released, a counter is started for 5 slow
clock cycles. This is the time it takes for the 32 kHz RC oscillator to stabilize.
After this time, the SHDN pin is asserted and the voltage regulator is enabled. The core power
supply rises and the brownout detector provides the bodcore_in signal as soon as the core volt-
age VDDCORE is valid. This results in releasing the vddcore_nreset signal to the Reset
Controller after the bodcore_in signal has been confirmed as being valid for at least one slow
clock cycle.
Zero-Power POR
7 x Slow Clock Cycles
T
Regulator
ON
Voltage
3 x Slow Clock
Cycles
3 x Slow Clock
Cycles
6430D–ATARM–25-Mar-11
6.5 x Slow Clock
Cycles