SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 230

• 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

25.4
230
SAM-BA Boot
SAM7SE512/256/32 Preliminary
The SAM-BA boot principle is to:
Figure 25-2. AutoBaudrate Flow Diagram
– Check if USB Device enumeration has occurred
– Check if the AutoBaudrate sequence has succeeded (see
– Once the communication interface is identified, the application runs in an infinite
loop waiting for different commands as in
Send Character '>'
Run SAM-BA Boot
Character '0x80'
Character '0x80'
Character '#'
Yes
Yes
Yes
received ?
received ?
received ?
Device
Setup
No
No
No
Table
25-1.
Test Communication
1st measurement
2nd measurement
UART operational
Figure
25-2)
6222F–ATARM–10-Jan-11