AT91SAM7SE256B-AUR Atmel, AT91SAM7SE256B-AUR Datasheet - Page 125
AT91SAM7SE256B-AUR
Manufacturer Part Number
AT91SAM7SE256B-AUR
Description
IC ARM7 MCU FLASH 256K 128-LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM7SE256-AU.pdf
(673 pages)
Specifications of AT91SAM7SE256B-AUR
Core Processor
ARM7
Core Size
16/32-Bit
Speed
55MHz
Connectivity
EBI/EMI, I²C, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
88
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Processor Series
SAM7SE256
Core
ARM7TDMI
Data Bus Width
32 bit
Data Ram Size
32 KB
Interface Type
SPI, USB
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
88
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Operating Temperature Range
- 40 C to + 85 C
Processor To Be Evaluated
AT91SAM7SE256B
Supply Current (max)
60 uA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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20.2.5.4
20.2.5.5
6222F–ATARM–14-Jan-11
Flash Lock Commands
Flash General-purpose NVM Commands
Lock bits can be set using WPL or EWPL commands. They can also be set by using the Set
Lock command (SLB). With this command, several lock bits can be activated. A Bit Mask is pro-
vided as argument to the command. When bit 0 of the bit mask is set, then the first lock bit is
activated.
In the same way, the Clear Lock command (CLB) is used to clear lock bits. All the lock bits are
also cleared by the EA command.
Table 20-9.
Lock bits can be read using Get Lock Bit command (GLB). The n
n of the bit mask is set..
Table 20-10. Get Lock Bit Command
General-purpose NVM bits (GP NVM bits) can be set using the Set Fuse command (SFB). This
command also activates GP NVM bits. A bit mask is provided as argument to the command.
When bit 0 of the bit mask is set, then the first GP NVM bit is activated.
In the same way, the Clear Fuse command (CFB) is used to clear general-purpose NVM bits.
All the general-purpose NVM bits are also cleared by the EA command. The general-purpose
NVM bit is deactivated when the corresponding bit in the pattern value is set to 1.
Table 20-11. Set/Clear GP NVM Command
General-purpose NVM bits can be read using the Get Fuse Bit command (GFB). The n
NVM bit is active when bit n of the bit mask is set..
Table 20-12. Get GP NVM Bit Command
Step
1
2
Step
1
2
Step
1
2
Step
1
2
Handshake Sequence
Write handshaking
Write handshaking
Handshake Sequence
Write handshaking
Read handshaking
Handshake Sequence
Write handshaking
Write handshaking
Handshake Sequence
Write handshaking
Read handshaking
Set and Clear Lock Bit Command
SAM7SE512/256/32 Preliminary
MODE[3:0]
CMDE
DATA
MODE[3:0]
CMDE
DATA
MODE[3:0]
CMDE
DATA
MODE[3:0]
CMDE
DATA
DATA[15:0]
SLB or CLB
Bit Mask
DATA[15:0]
Lock Bit Mask Status
0 = Lock bit is cleared
1 = Lock bit is set
DATA[15:0]
DATA[15:0]
GFB
GP NVM Bit Mask Status
0 = GP NVM bit is cleared
1 = GP NVM bit is set
GLB
SFB or CFB
GP NVM bit pattern value
th
lock bit is active when the bit
th
125
GP
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