MPC8313CZQADDC Freescale Semiconductor, MPC8313CZQADDC Datasheet - Page 238

• Manufacturer Part Number: MPC8313CZQADDC
• Description: Microprocessors - MPU 8313 REV2.2 PB NO EN EXT
• Manufacturer: Freescale Semiconductor

Specifications of MPC8313CZQADDC

• Processor Series: MPC8313
• Core: e300
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 133 MHz
• Program Memory Size: 16 KB
• Data Ram Size: 16 KB
• Interface Type: I2C
• Mounting Style: SMD/SMT
• Package / Case: PBGA
• Number Of Programmable I/os: 32
• Number Of Timers: 4

System Configuration
the software watchdog timer for a certain period of time (for example, because software is lost or trapped
in a loop with no controlled exit).
Figure 5-18
The software watchdog timer is enabled after reset to cause a hardware reset if it times out. The user has
the option of disabling the software watchdog if it is not needed. If used, the software watchdog timer
requires a special service sequence to be executed periodically. Without this periodic servicing, the
software watchdog timer times out and issues a reset or a non-maskable interrupt.
5.4.2
The WDT includes the following key features:
5.4.3
The WDT unit can operate in the following modes:
5-30
•
•
•
•
•
•
•
Based on 16-bit prescaler and 16-bit down-counter
Provides a selectable range for the time-out period
Provides ~12.8-sec maximum software time-out delay for 333-MHz input clock
Functional and programming compatibility with MPC8260 watchdog timer
WDT enable/disable mode:
If the software watchdog timer is not needed, the user can disable it with software after a system
reset. When the watchdog timer is disabled, the watchdog counter and prescaler counter are held
in a stopped state.
WDT output reset/interrupt mode:
Without software periodic servicing, the software watchdog timer times out and issues a reset or a
nonmaskable interrupt (mcp)
WDT prescaled/non-prescaled clock mode:
The WDT counter clock can be prescaled by programming the SWCRR[SWPR] bit, which
controls the divide-by-65,536 of the WDT counter.
WDT Features
WDT Modes of Operation
shows a high-level block diagram of the WDT.
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
Figure 5-18. Software Watchdog Timer High-Level Block Diagram
System
clock
Register Interface
Watchdog
Software
Timer
or mcp
Reset
Freescale Semiconductor