SAM7X128 Atmel Corporation, SAM7X128 Datasheet - Page 19
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SAM7X128
Manufacturer Part Number
SAM7X128
Description
Manufacturer
Atmel Corporation
Specifications of SAM7X128
Flash (kbytes)
128 Kbytes
Pin Count
100
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
62
Ext Interrupts
62
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
3
Can
1
Ssc
1
Ethernet
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
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.3
Operating Voltage (vcc)
3.0 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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8.4
8.4.1
8.4.2
8.4.3
6120I–ATARM–06-Apr-11
Memory Mapping
Internal SRAM
Internal ROM
Internal Flash
After reset and until the Remap Command is performed, the SRAM is only accessible at address
0x0020 0000. After Remap, the SRAM also becomes available at address 0x0.
The SAM7X512/256/128 embeds an Internal ROM. At any time, the ROM is mapped at address
0x30 0000. The ROM contains the FFPI and the SAM-BA program.
At any time, the Flash is mapped to address 0x0010 0000. It is also accessible at address 0x0
after the reset, if GPNVM bit 2 is set and before the Remap Command.
A general purpose NVM (GPNVM) bit is used to boot either on the ROM (default) or from the
Flash.
This GPNVM bit can be cleared or set respectively through the commands “Clear General-pur-
pose NVM Bit” and “Set General-purpose NVM Bit” of the EFC User Interface.
Setting the GPNVM Bit 2 selects the boot from the Flash. Asserting ERASE clears the GPNVM
Bit 2 and thus selects the boot from the ROM by default.
Figure 8-2.
• The SAM7X512 embeds a high-speed 128 Kbyte SRAM bank.
• The SAM7X256 embeds a high-speed 64 Kbyte SRAM bank.
• The SAM7X128 embeds a high-speed 32 Kbyte SRAM bank.
• The SAM7X512 features two banks (dual plane) of 256 Kbytes of Flash.
• The SAM7X256 features one bank (single plane) of 256 Kbytes of Flash.
• The SAM7X128 features one bank (single plane) of 128 Kbytes of Flash.
256M Bytes
Internal Memory Mapping with GPNVM Bit 2 = 0 (default)
0x0000 0000
0x0010 0000
0x0020 0000
0x0030 0000
0x000F FFFF
0x001F FFFF
0x002F FFFF
0x0FFF FFFF
0x003F FFFF
0x0040 0000
ROM Before Remap
SRAM After Remap
Undefined Areas
Internal FLASH
Internal SRAM
Internal ROM
(Abort)
SAM7X512/256/128
252 M Bytes
1 M Bytes
1 M Bytes
1 M Bytes
1 M Bytes
19
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