Sram Keep-Alive Power Behavior - Motorola MPC533 Reference Manual

SRAM Keep-Alive Power Behavior

— Enhanced exception relocation table
— Branch target buffer
— 2 Kbytes of decompression RAM for code compression. This may also be used
as general-purpose RAM while not used for code compression.
• CALRAM (with overlay features)
— New module
— Overlay features allow calibration of Flash-based constants
• UC3F (U-bus CDR3 Flash module)
— 512 Kbytes of non-volatile memory (NVM)
— Designed for use in embedded microcontroller (MCU) applications targeted for
high speed read performance and high density byte count requirements
• READI
— New module
• USIU
— Enhanced interrupt controller
— ENGCLK default frequency
— READI support
— Reduced data setup time
— Enhanced external burst support
• MIOS14
— Four additional PWM channels
— Four additional MCSM timers
• PPM (peripheral pin multiplexing)
— New module
— Two-to-one multiplexing
— Parallel to serial (SPI and TDM)
1.7 SRAM Keep-Alive Power Behavior
One keep-alive power pin (IRAMSTBY) provides keep-alive power to RAM.
The IRAMSTBY pin can be powered directly from a battery using an internal shunt
regulator or via a small battery for standby use. See Figure 1-2.
1-10
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
MPC533 Reference Manual MOTOROLA