AT91RM9200-QI-002 Atmel, AT91RM9200-QI-002 Datasheet - Page 400

• Manufacturer Part Number: AT91RM9200-QI-002
• Description: IC ARM9 MCU 208 PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-QI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Figure 29-10. TWI Write in Master Mode
400
AT91RM9200
TWI_THR = data to send
Yes
Set the Master Mode register:
Internal address size = 0?
Write ==> bit MREAD = 0
TWI_THR = Data to send
Set the control register:
TWI_CR = TWI_START
TWI_CR = TWI_MSEN
- Device slave address
TWI_CR = TWI_STOP
- Internal address size
Load transmit register
- Transfer direction bit
TWI_CWGR = clock
Read status register
Read status register
Start the transfer
Stop the transfer
- Master enable
TXCOMP = 0?
Set TWI clock:
Data to send?
TXRDY = 0?
Yes
START
END
Yes
Set the internal address
TWI_IADR = address
1768I–ATARM–09-Jul-09