AT91SAM9M10-CU Atmel, AT91SAM9M10-CU Datasheet - Page 500
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AT91SAM9M10-CU
Manufacturer Part Number
AT91SAM9M10-CU
Description
IC MCU 16/32BIT ARM9 324TFBGA
Manufacturer
Atmel
Series
AT91SAMr
Specifications of AT91SAM9M10-CU
Core Processor
ARM9
Core Size
16/32-Bit
Speed
400MHz
Connectivity
EBI/EMI, Ethernet, I²C, SPI, SSC, UART/USART, USB
Peripherals
AC'97, DMA, LCD, POR, PWM, WDT
Number Of I /o
160
Program Memory Size
64KB (64K x 8)
Program Memory Type
ROM
Ram Size
128K x 8
Voltage - Supply (vcc/vdd)
0.9 V ~ 1.1 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
324-TFBGA
Processor Series
AT91SAMx
Core
ARM926EJ-S
Data Bus Width
32 bit
Data Ram Size
32 KB
Interface Type
2-Wire, SPI, USART
Maximum Clock Frequency
133 MHz
Number Of Programmable I/os
5
Number Of Timers
2 x 16 bit
Operating Supply Voltage
1.65 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
AT91SAM-ICE, AT91-ISP, AT91SAM9M10-G45-EK
Controller Family/series
AT91
No. Of I/o's
160
Ram Memory Size
64KB
Cpu Speed
400MHz
No. Of Timers
2
Rohs Compliant
Yes
Cpu Family
AT91
Device Core
ARM926EJ-S
Device Core Size
32b
Frequency (max)
400MHz
Total Internal Ram Size
64KB
# I/os (max)
160
Number Of Timers - General Purpose
7
Operating Supply Voltage (typ)
1.8/2.5/3.3V
Operating Supply Voltage (max)
1.1/1.95/3.6V
Operating Supply Voltage (min)
0.9/1.65/1.8/3V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
324
Package Type
TFBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT91SAM9M10-CU
Manufacturer:
Atmel
Quantity:
996
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31.9
31.9.1
31.9.2
31.9.2.1
31.9.2.2
500
Multi-master Mode
AT91SAM9M10
Definition
Different Multi-master Modes
TWI as Master Only
TWI as Master or Slave
More than one master may handle the bus at the same time without data corruption by using
arbitration.
Arbitration starts as soon as two or more masters place information on the bus at the same time,
and stops (arbitration is lost) for the master that intends to send a logical one while the other
master sends a logical zero.
As soon as arbitration is lost by a master, it stops sending data and listens to the bus in order to
detect a stop. When the stop is detected, the master who has lost arbitration may put its data on
the bus by respecting arbitration.
Arbitration is illustrated in
Two multi-master modes may be distinguished:
Note:
In this mode, TWI is considered as a Master only (MSEN is always at one) and must be driven
like a Master with the ARBLST (ARBitration Lost) flag in addition.
If arbitration is lost (ARBLST = 1), the programmer must reinitiate the data transfer.
If the user starts a transfer (ex.: DADR + START + W + Write in THR) and if the bus is busy, the
TWI automatically waits for a STOP condition on the bus to initiate the transfer (see
21 on page
Note:
The automatic reversal from Master to Slave is not supported in case of a lost arbitration.
Then, in the case where TWI may be either a Master or a Slave, the programmer must manage
the pseudo Multi-master mode described in the steps below.
1. TWI is considered as a Master only and will never be addressed.
2. TWI may be either a Master or a Slave and may be addressed.
1. Program TWI in Slave mode (SADR + MSDIS + SVEN) and perform Slave Access (if
2. If TWI has to be set in Master mode, wait until TXCOMP flag is at 1.
3. Program Master mode (DADR + SVDIS + MSEN) and start the transfer (ex: START +
4. As soon as the Master mode is enabled, TWI scans the bus in order to detect if it is
5. As soon as the transfer is initiated and until a STOP condition is sent, the arbitration
6. If the arbitration is lost (ARBLST is set to 1), the user must program the TWI in Slave
7. If TWI has to be set in Slave mode, wait until TXCOMP flag is at 1 and then program the
TWI is addressed).
Write in THR).
busy or free. When the bus is considered as free, TWI initiates the transfer.
becomes relevant and the user must monitor the ARBLST flag.
mode in the case where the Master that won the arbitration wanted to access the TWI.
Slave mode.
In both Multi-master modes arbitration is supported.
The state of the bus (busy or free) is not indicated in the user interface.
501).
Figure 31-22 on page
501.
6355B–ATARM–21-Jun-10
Figure 31-
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