SAM3S4B Atmel Corporation, SAM3S4B Datasheet - Page 975

• Manufacturer Part Number: SAM3S4B
• Manufacturer: Atmel Corporation

Specifications of SAM3S4B

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 64 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 23
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 79
• Ext Interrupts: 79
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 2
• Uart: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 10
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1000
• Analog Comparators: 1
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 48
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 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: Yes

38.7.8
Name:
Address:
Access:
• WPEN: Write Protect Enable
0 = disables the Write Protect if WPKEY corresponds to 0x414343 (“ACC” in ASCII).
1 = enables the Write Protect if WPKEY corresponds to 0x414343 (“ACC” in ASCII).
Protects the registers:
• WPKEY: Write Protect KEY
This security code is needed to set/reset the WPROT bit value (see
Must be filled with “ACC” ASCII code.
6500C–ATARM–8-Feb-11
•
•
“ACC Mode Register” on page 969
“ACC Analog Control Register” on page 974
31
23
15
7
–
ACC Write Protect Mode Register
30
22
14
ACC_WPMR
0x400400E4
Read-write
6
–
29
21
13
5
–
28
20
12
4
–
WPKEY
WPKEY
WPKEY
27
19
11
Section 38.6.3 ”Write Protection System”
3
–
26
18
10
2
–
25
17
9
1
–
SAM3S
for details).
WPEN
24
16
8
0
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