SAM7S16 Atmel Corporation, SAM7S16 Datasheet - Page 98
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SAM7S16
Manufacturer Part Number
SAM7S16
Description
Manufacturer
Atmel Corporation
Specifications of SAM7S16
Flash (kbytes)
16 Kbytes
Pin Count
48
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
21
Ext Interrupts
21
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Uart
2
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)
4
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
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
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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18.3
18.3.1
18.3.2
98
Functional Description
SAM7S Series
Bus Arbiter
Address Decoder
The Memory Controller handles the internal ASB bus and arbitrates the accesses of both
masters.
It is made up of:
The MC handles only little-endian mode accesses. The masters work in little-endian mode only.
The Memory Controller has a simple, hard-wired priority bus arbiter that gives the control of the
bus to one of the two masters. The Peripheral DMA Controller has the highest priority; the ARM
processor has the lowest one.
The Memory Controller features an Address Decoder that first decodes the four highest bits of
the 32-bit address bus and defines three separate areas:
Figure 18-2
Figure 18-2. Memory Areas
• A bus arbiter
• An address decoder
• An abort status
• A misalignment detector
• An Embedded Flash Controller
• One 256-Mbyte address space for the internal memories
• One 256-Mbyte address space reserved for the embedded peripherals
• An undefined address space of 3584M bytes representing fourteen 256-Mbyte areas that
return an Abort if accessed
shows the assignment of the 256-Mbyte memory areas.
14 x 256MBytes
256M Bytes
256M Bytes
3,584 Mbytes
0xF000 0000
0x0000 0000
0xEFFF FFFF
0xFFFF FFFF
0x0FFF FFFF
0x1000 0000
Internal Memories
Peripherals
Undefined
(Abort)
6175L–ATARM–28-Jul-11
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