AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 385

• Manufacturer Part Number: AT91SAM9261-CJ-999
• Description: IC MCU ARM9 ULTRA LP 217LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9261-CJ-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 190MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: DMA, LCD, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 192K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 217-LFBGA
• For Use With: AT91SAM9261-EK - KIT EVAL FOR AT91SAM926EJ-SAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Figure 31-11. Master Write with One, Two or Three Bytes Internal Address and One Data Byte
Figure 31-12. Master Read with One, Two or Three Bytes Internal Address and One Data Byte
31.7.6.2
385
TWD
TWD
TWD
TWD
TWD
TWD
Three bytes internal address
Two bytes internal address
One byte internal address
Three bytes internal address
Two bytes internal address
One byte internal address
AT91SAM9261 Preliminary
S
S
S
S
S
S
10-bit Slave Addressing
DADR
DADR
DADR
DADR
DADR
DADR
For a slave address higher than 7 bits, the user must configure the address size (IADRSZ) and
set the other slave address bits in the internal address register (TWI_IADR). The two remaining
Internal address bytes, IADR[15:8] and IADR[23:16] can be used the same as in 7-bit Slave
Addressing.
Example: Address a 10-bit device (10-bit device address is b1 b2 b3 b4 b5 b6 b7 b8 b9 b10)
Figure 31-13
the use of internal addresses to access the device.
Figure 31-13. Internal Address Usage
W
W
W
1. Program IADRSZ = 1,
2. Program DADR with 1 1 1 1 0 b1 b2 (b1 is the MSB of the 10-bit address, b2, etc.)
3. Program TWI_IADR with b3 b4 b5 b6 b7 b8 b9 b10 (b10 is the LSB of the 10-bit
W
W
W
address)
A
A
A
A
A
A
IADR(23:16)
IADR(15:8)
IADR(7:0)
below shows a byte write to an Atmel AT24LC512 EEPROM. This demonstrates
IADR(23:16)
IADR(15:8)
IADR(7:0)
R
S
T
A
T
M
S
B
Address
Device
A
A
A
0
IADR(15:8)
A
A
A
Sr
IADR(7:0)
S
B
L
W
W
R
T
E
R
I
/
C
A
K
DADR
WORD ADDRESS
IADR(15:8)
IADR(7:0)
M
S
B
DATA
FIRST
R
A
A
IADR(7:0)
Sr
A
A
A
A
A
C
K
WORD ADDRESS
SECOND
DADR
IADR(7:0)
P
DATA
DATA
A
L
S
B
C
A
K
Sr
R
A
A
DATA
N
A
DADR
DATA
P
DATA
P
DATA
A
C
K
6062M–ATARM–23-Mar-09
O
S
T
P
R
N
A
P
A
N
P
P