SAM3S4B Atmel Corporation, SAM3S4B Datasheet - Page 840

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SAM3S4B

Manufacturer Part Number
SAM3S4B
Description
Manufacturer
Atmel Corporation
Datasheets

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
35.14.17 HSMCI Write Protect Mode Register
Name:
Address:
Access:
• WP_EN: Write Protection Enable
0 = Disables the Write Protection if WP_KEY corresponds to 0x4D4349 (“MCI’ in ASCII).
1 = Enables the Write Protection if WP_KEY corresponds to 0x4D4349 (“MCI’ in ASCII).
• WP_KEY: Write Protection Key password
Should be written at value 0x4D4349 (ASCII code for “MCI”). Writing any other value in this field has no effect.
Protects the registers:
840
“HSMCI Mode Register” on page 816
“HSMCI Data Timeout Register” on page 818
“HSMCI SDCard/SDIO Register” on page 819
“HSMCI Completion Signal Timeout Register” on page 825
“HSMCI Configuration Register” on page 839
31
23
15
7
SAM3S
30
22
14
HSMCI_WPMR
0x400000E4
Read-write
6
29
21
13
5
WP_KEY (0x4D => “M”)
WP_KEY (0x43 => C”)
WP_KEY (0x49 => “I”)
28
20
12
4
27
19
11
3
26
18
10
2
25
17
9
1
6500C–ATARM–8-Feb-11
WP_EN
24
16
8
0

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