SAM7S321 Atmel Corporation, SAM7S321 Datasheet - Page 264

• Manufacturer Part Number: SAM7S321
• Manufacturer: Atmel Corporation

Specifications of SAM7S321

• Flash (kbytes): 32 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): 8
• 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

Debug in Depth
B.13.2 Software breakpoints
B-46
To make a watchpoint unit cause software breakpoints on instruction fetches of a
particular bit pattern:
1.
2.
3.
4.
5.
6.
7.
You do not have to program the address value register.
Setting the breakpoint
To set the software breakpoint:
1.
2.
Clearing the breakpoint
To clear the software breakpoint, restore the instruction to the address.
Program its address mask register to
address is disregarded.
Program the data value register with the particular bit pattern that has been chosen
to represent a software breakpoint.
If you are programming a Thumb software breakpoint, repeat the 16-bit pattern
in both halves of the data value register. For example, if the bit pattern is
program
compares only the valid half of the data bus against the contents of the data value
register. In this way, you can use a single watchpoint register to catch software
breakpoints on both the upper and lower halves of the data bus.
Program the data mask register to
Program the control value register with nOPC = 0.
Program the control mask register with nOPC = 0 and all other bits to 1.
If you wish to make the distinction between User and non-User mode instruction
fetches, program the nTRANS bit in the control value and control mask registers
accordingly.
If required, program the EXTERN, RANGE, and CHAIN bits in the same way.
Read the instruction at the desired address and store it away.
Write the special bit pattern representing a software breakpoint at the address.
Note
Copyright © 1994-2001. All rights reserved.
. When a 16-bit instruction is fetched, EmbeddedICE
.
, all bits set to 1, so that the
ARM DDI 0029G
,