SAM7S256 Atmel Corporation, SAM7S256 Datasheet - Page 127
SAM7S256
Manufacturer Part Number
SAM7S256
Description
Manufacturer
Atmel Corporation
Specifications of SAM7S256
Flash (kbytes)
256 Kbytes
Pin Count
64
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
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)
64
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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5.2.3
ARM DDI 0029G
Debug target
The ARM7TDMI processor has hardware extensions that ease debugging at the lowest
level. The debug extensions:
•
•
•
•
The major blocks of the debug target are shown in Figure 5-2.
The ARM CPU core
The EmbeddedICE Logic
The TAP controller
allow you to halt program execution
examine and modify the core internal state of the core
view and modify the state of the memory system
resume program execution.
Copyright © 1994-2001. All rights reserved.
EmbeddedICE
This has hardware support for debug.
This is a set of registers and comparators used to generate debug
exceptions such as breakpoints. This unit is described in About
EmbeddedICE Logic on page 5-13.
This controls the action of the scan chains using a JTAG serial interface.
Scan chain 2
Logic
TAP controller
Scan chain 0
Scan chain 1
Figure 5-2 ARM7TDMI block diagram
Main processor
logic
Debug Interface
5-5
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