M40800 Atmel Corporation, M40800 Datasheet - Page 265
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
M40800
Manufacturer Part Number
M40800
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(21 pages)
3.M40800.pdf
(18 pages)
4.M40800.pdf
(153 pages)
Specifications of M40800
Flash (kbytes)
0 Kbytes
Pin Count
100
Max. Operating Frequency
40 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
8
Self Program Memory
NO
External Bus Interface
1
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
32khz Rtc
No
Calibrated Rc Oscillator
No
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B.14
ARM DDI 0029G
Programming watchpoints
To make a watchpoint unit cause watchpoints on data accesses:
1.
2.
3.
4.
5.
6.
7.
The above are examples of how to program the watchpoint register to generate
breakpoints and watchpoints. Many other ways of programming the registers are
possible. For instance, you can provide simple range breakpoints by setting one or more
of the address mask bits.
Program its address value register with the address of the data access to be
watchpointed.
Program the address mask register to
Program the data value register only if you require a data-dependent watchpoint,
that is, only if you need to match the actual data value read or written as well as
the address. If the data value is irrelevant, program the data mask register to
Program the control value register with nOPC = 1, nRW = 0 for a read, or nRW
= 1 for a write, MAS[1:0] with the value corresponding to the appropriate data
size.
Program the control mask register with nOPC = 0, nRW = 0, MAS[1:0] = 0 and
all other bits to 1. You can set nRW, or MAS[1:0] to 1 when both reads and
writes, or data size accesses are to be watchpointed respectively.
If you wish to make the distinction between User and non-User mode data
accesses, 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.
Note
Copyright © 1994-2001. All rights reserved.
, all bits set to 1. Otherwise program the data mask register to
.
.
Debug in Depth
B-47
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