AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 399

• Manufacturer Part Number: AT91RM9200-CI-002
• Description: IC ARM9 MCU 256 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-CI-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: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

29.5.4
1768I–ATARM–09-Jul-09
Read/Write Flowcharts
Figure 29-9
internal addresses to access the device.
Figure 29-9.
The following flowcharts shown in
give examples for read and write operations in Master Mode. A polling or interrupt method can
be used to check the status bits. The interrupt method requires that the interrupt enable register
(TWI_IER) be configured first.
• P = Stop
• W = Write
• R = Read
• A = Acknowledge
• N = Not Acknowledge
• DADR= Device Address
• IADR = Internal Address
shows a byte write to an Atmel AT24LC512 EEPROM. This demonstrates the use of
Internal Address Usage
S
T
A
R
T
M
S
B
Address
Device
0
S
B
L
W
W
R
E
R
T
I
/
A
C
K
WORD ADDRESS
M
Figure 29-10 on page 400
S
B
FIRST
C
A
K
WORD ADDRESS
SECOND
L
S
B
A
C
K
and in
DATA
Figure 29-11 on page 401
AT91RM9200
A
C
K
S
O
P
T
399