AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 131
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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Manufacturer
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19.5.2
Name:
Address:
Access Type:Read-write
• SLOT_CYCLE: Maximum Number of Allowed Cycles for a Burst
When the SLOT_CYCLE limit is reached for a burst, it may be broken by another master trying to access this slave.
This limit has been set to avoid locking very slow slaves when very long bursts are used.
This limit should not be very small. An unreasonably small value breaks every burst and the Bus Matrix spends its time
arbitrating without performing any data transfer. 16 cycles is a reasonable value for SLOT_CYCLE.
• DEFMASTR_TYPE: Default Master Type
0: No Default Master
At the end of the current slave access, if no other master request is pending, the slave is disconnected from all masters.
This results in one cycle latency for the first transfer of a burst.
1: Last Default Master
At the end of the current slave access, if no other master request is pending, the slave remains connected to the last mas-
ter that accessed it.
This results in not having the one cycle latency when the last master is trying to access the slave again.
2: Fixed Default Master
At the end of the current slave access, if no other master request is pending, the slave connects with the fixed master that
has its index in FIXED_DEFMSTR register.
This results in not having the one cycle latency when the fixed master is trying to access the slave again.
• FIXED_DEFMSTR: Fixed Index of Default Master
This is the index of the Fixed Default Master for this slave.
6062M–ATARM–23-Mar-09
31
23
15
–
–
–
7
Bus Matrix Slave Configuration Registers
MATRIX_SCFG0...MATRIX_SCFG4
0xFFFFEE04
30
22
14
–
–
6
29
21
13
–
–
5
28
20
12
–
–
4
SLOT_CYCLE
FIXED_DEFMSTR
27
19
11
–
–
3
AT91SAM9261 Preliminary
26
18
10
–
–
2
25
17
–
9
–
1
DEFMSTR_TYPE
24
16
–
8
–
0
131
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