ATSAM3S4AA-MU Atmel, ATSAM3S4AA-MU Datasheet - Page 195

• Manufacturer Part Number: ATSAM3S4AA-MU
• Description: IC MCU 32BIT 256KB FLASH 48QFN
• Manufacturer: Atmel
• Series: SAM3Sr

Specifications of ATSAM3S4AA-MU

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 64MHz
• Connectivity: I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 1.95 V
• Data Converters: A/D 8x10/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-VQFN Exposed Pad, 48-HVQFN, 48-SQFN, 48-DHVQFN
• Processor Series: ATSAM3x
• Core: ARM Cortex M3
• 3rd Party Development Tools: JTRACE-CM3, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: ATSAM3S-EK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

10.22.4
• NOREF
Reads as zero.
• SKEW
Reads as zero
• TENMS
Read as 0x00001F40. The SysTick calibration value is fixed at 0x00001F40 (10500), which allows the generation of a time
base of 1 ms with SysTick clock at 8 MHz (64/8 = 8 MHz)
10.22.5
6500C–ATARM–8-Feb-11
NOREF
31
23
15
7
SysTick Calibration Value Register
SysTick design hints and tips
SKEW
30
22
14
6
The CALIB register indicates the SysTick calibration properties. See the register summary in
Table 10-33 on page 191
The SysTick counter runs on the processor clock. If this clock signal is stopped for low power
mode, the SysTick counter stops.
Ensure software uses aligned word accesses to access the SysTick registers.
29
21
13
5
for its attributes. The bit assignments are:
28
20
12
4
TENMS
TENMS
TENMS
27
19
11
3
Reserved
26
18
10
2
SAM3S Preliminary
25
17
9
1
24
16
8
0
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