AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 394
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AT91SAM9261-CJ-999
Manufacturer Part Number
AT91SAM9261-CJ-999
Description
IC MCU ARM9 ULTRA LP 217LFBGA
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM9261-CJ-999.pdf
(749 pages)
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
-
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Part Number
Manufacturer
Quantity
Price
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Figure 31-21. Programmer Sends Data While the Bus is Busy
Figure 31-22. Arbitration Cases
394
Data from a Master
TWI DATA transfer
TWI DATA transfer
Data from TWI
(DADR + W + START + Write THR)
(DADR + W + START + Write THR)
AT91SAM9261 Preliminary
ARBLST
TWCK
A transfer is programmed
TWCK
TWD
TWD
A transfer is programmed
TWCK
TWD
Note:
The flowchart shown in
in Multi-master mode.
S
S
S
In the case where the arbitration is lost and TWI is addressed, TWI will not acknowledge even if it
is programmed in Slave mode as soon as ARBLST is set to 1. Then, the Master must repeat
SADR.
DATA sent by a master
1
1
1
Transfer is stopped
Bus is busy
0 0
0
0 0
1
STOP sent by the master
Transfer is kept
1 1
1 1
TWI stops sending data
Arbitration is lost
Figure 31-23 on page 395
(DADR + W + START + Write THR)
Transfer is programmed again
Data from the master
Bus is busy
Transfer is kept
Bus is free
Bus is considered as free
Transfer is initiated
P
P
Bus is free
gives an example of read and write operations
Bus is considered as free
Transfer is initiated
START sent by the TWI
S
S
S
1
1
1
0
0 0
0
DATA sent by the TWI
1
0
The master stops sending data
1 1
1 1
Arbitration is lost
6062M–ATARM–23-Mar-09
Data from the TWI
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