SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 105

• Manufacturer Part Number: SAM7SE256
• Manufacturer: Atmel Corporation

Specifications of SAM7SE256

• Flash (kbytes): 256 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 48 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 88
• Ext Interrupts: 88
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

SAM7SE512/256/32
To run one of these commands, the field FCMD of the MC_FCR register has to be written with
the command number. As soon as the MC_FCR register is written, the FRDY flag is automati-
cally cleared. Once the current command is achieved, then the FRDY flag is automatically set. If
an interrupt has been enabled by setting the bit FRDY in MC_FMR, the interrupt line of the Mem-
ory Controller is activated.
All the commands are protected by the same keyword, which has to be written in the eight high-
est bits of the MC_FCR register.
Writing MC_FCR with data that does not contain the correct key and/or with an invalid command
has no effect on the memory plane; however, the PROGE flag is set in the MC_FSR register.
This flag is automatically cleared by a read access to the MC_FSR register.
When the current command writes or erases a page in a locked region, the command has no
effect on the whole memory plane; however, the LOCKE flag is set in the MC_FSR register. This
flag is automatically cleared by a read access to the MC_FSR register.
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