ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 725

• Manufacturer Part Number: ATSAM3X4EA-AU
• Description: ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
• Manufacturer: Atmel

Specifications of ATSAM3X4EA-AU

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SAM3X
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 84 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Temperature Range: - 40 C to +85 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 60

11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
Figure 34-16. TWI Write Operation with Single Data Byte and Internal Address
(CLDIV, CHDIV, CKDIV) in TWI_CWGR
- Internal address size (IADRSZ)
- Device slave address (DADR)
Set the Master Mode register:
TWI_CR = MSEN + SVDIS
Write ==> bit MREAD = 0
TWI_THR = Data to send
Set the internal address
Set the Control register:
Write STOP command
TWI_IADR = address
- Transfer direction bit
Load transmit register
Read Status register
Read Status register
(Needed only once)
TWI_CR = STOP
Transfer finished
Yes
- Master enable
TXCOMP = 1?
Set TWI clock
TXRDY = 1?
Yes
BEGIN
No
No
SAM3X/A
SAM3X/A
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