ATSAM3S4AA-MU Atmel, ATSAM3S4AA-MU Datasheet - Page 617

• 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

31.5
Figure 31-2. Application Block Diagram
31.5.1
Table 31-3.
31.6
31.6.1
6500C–ATARM–8-Feb-11
Pin Name
TWD
TWCK
Application Block Diagram
Product Dependencies
I/O Lines Description
I/O Lines
I/O Lines Description
Rp: Pull up value as given by the I²C Standard
Host with
Interface
TWI
Both TWD and TWCK are bidirectional lines, connected to a positive supply voltage via a current
source or pull-up resistor (see
high. The output stages of devices connected to the bus must have an open-drain or open-col-
lector to perform the wired-AND function.
TWD and TWCK pins may be multiplexed with PIO lines. To enable the TWI, the programmer
must perform the following step:
The user must not program TWD and TWCK as open-drain. It is already done by the hardware.
Table 31-4.
TWD
TWCK
• Program the PIO controller to dedicate TWD and TWCK as peripheral lines.
Serial EEPROM
Instance
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
TWI0
TWI0
TWI1
TWI1
Atmel TWI
Slave 1
I/O Lines
I²C RTC
Slave 2
Figure 31-2 on page
TWCK0
TWCK1
Signal
TWD0
TWD1
Controller
I²C LCD
Slave 3
I²C Temp.
617). When the bus is free, both lines are
Slave 4
Sensor
SAM3S Preliminary
I/O Line
Rp
PB5
PB4
PA4
PA3
Rp
Peripheral
VDD
Input/Output
Input/Output
Type
A
A
A
A
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