AT91SAM7SE256B-CUR Atmel, AT91SAM7SE256B-CUR Datasheet - Page 132
AT91SAM7SE256B-CUR
Manufacturer Part Number
AT91SAM7SE256B-CUR
Description
IC ARM7 MCU FLASH 256K 128-LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM7SE256-AU.pdf
(673 pages)
Specifications of AT91SAM7SE256B-CUR
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
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Part Number
Manufacturer
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Price
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20.3.4.3
20.3.4.4
20.3.4.5
132
SAM7SE512/256/32 Preliminary
Flash Full Erase Command
Flash Lock Commands
Flash General-purpose NVM Commands
This command is used to erase the Flash memory planes.
All lock bits must be deactivated before using the Full Erase command. This can be done by
using the CLB command.
Table 20-21. Full Erase Command
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 at the same time.
Bit 0 of Bit Mask corresponds to the first lock bit and so on.
In the same way, the Clear Lock command (CLB) is used to clear lock bits. All the lock bits can
also be cleared by the EA command.
Table 20-22. Set and Clear Lock Bit Command
Lock bits can be read using Get Lock Bit command (GLB). When a bit set in the Bit Mask is
returned, then the corresponding lock bit is active.
Table 20-23. Get Lock Bit Command
General-purpose NVM bits (GP NVM) can be set with the Set Fuse command (SFB). Using this
command, several GP NVM bits can be activated at the same time. Bit 0 of Bit Mask corre-
sponds to the first fuse bit and so on.
In the same way, the Clear Fuse command (CFB) is used to clear GP NVM bits. All the general-
purpose NVM bits are also cleared by the EA command.
Table 20-24. Set and Clear General-purpose NVM Bit Command
Read/Write
Write
Read/Write
Write
Write
Read/Write
Write
Read
Read/Write
Write
Write
DR Data
EA
DR Data
SLB or CLB
Bit Mask
DR Data
GLB
Bit Mask
DR Data
SFB or CFB
Bit Mask
6222F–ATARM–14-Jan-11
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