AT91M43300
7
WD: Watchdog Timer
The AT91M43300 features an internal Watchdog Timer
that can be used to guard against system lock-up if the
software becomes trapped in a deadlock.
PMC: Power Management Controller
The Power Management Controller allows optimization of
power consumption. The PMC enables/disables the clock
inputs to most of the peripherals as well as to the ARM pro-
cessor core.
When the ARM core clock is disabled, the current instruc-
tion is processed before the clock is stopped. The clock
can be re-enabled by any enabled interrupt or by a hard-
ware reset.
When a peripheral clock is disabled, the clock is immedi-
ately stopped. When the clock is re-enabled, the peripheral
resumes action where it left off.
Due to the static nature of the design, the contents of the
on-chip RAM and registers for which the clocks are dis-
abled remain unchanged.
SF: Special Function
The AT91M43300 provides registers that implement the
following special functions:
• Chip identification
• RESET status
Ordering Information
Max Speed
(MHz)
Core Operating
Voltage
I/O Operating
Voltage Ordering Code
RAM
(bytes) Package
Operating
Temperature
Range
25 2.7V to 3.6V 2.7V to 5.5V
AT91M43300-25CC
3K BGA 144
Commercial
(0°C to 70°C)
AT91M43300-25CI Industrial
(-40°C to 85°C)
12 1.8V to 3.6V 2.7V to 3.6V
AT91M43300-12CC-1.8 Commercial
(0°C to 70°C)
AT91M43300-12CI-1.8 Industrial
(-40°C to 85°C)