M42800A Atmel Corporation, M42800A Datasheet - Page 243
M42800A
Manufacturer Part Number
M42800A
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.M42800A.pdf
(224 pages)
4.M42800A.pdf
(27 pages)
Specifications of M42800A
Flash (kbytes)
0 Kbytes
Pin Count
144
Max. Operating Frequency
33 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
54
Ext Interrupts
54
Usb Speed
No
Usb Interface
No
Spi
2
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
3.3/5.0
Fpu
No
Mpu / Mmu
no / no
Timers
6
Output Compare Channels
6
Input Capture Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- Current page: 243 of 284
- Download datasheet (2Mb)
ARM DDI 0029G
The instruction in Example B-1 on page B-24 causes the contents of the registers to
appear on the data bus. You can then sample and shift out these values.
The use of
any register.
After you have determined the values in the current bank of registers, you might want
to access the banked registers. To do this, you must change mode. Typically, a mode
change can occur only if the core is already in a privileged mode. However, while in
debug state, a mode change from one mode into any other mode can occur. The
debugger must restore the original mode before exiting debug state.
For example, if the debugger has been requested to return the state of the User mode
registers and FIQ mode registers and debug state was entered in Supervisor mode, the
instruction sequence can be as listed in Example B-2.
All these instructions execute at debug speed. Debug speed is much slower than system
speed. This is because between each core clock, 33 clocks occur in order to shift in an
instruction, or shift out data. Executing instructions this slowly is acceptable for
accessing the core state because the ARM7TDMI core is fully static. However, you
cannot use this method for determining the state of the rest of the system.
While in debug state, only the following instructions can be scanned into the instruction
pipeline for execution:
•
•
•
all data processing operations
all load, store, load multiple, and store multiple instructions
MSR and MRS.
Note
Copyright © 1994-2001. All rights reserved.
as the base register for the STM is only for illustration and you can use
Example B-2 Determining state of User and FIQ mode registers
Debug in Depth
B-25
Related parts for M42800A
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: