Specifications

16 Motorola 56F8300 Hybrid Controller Family Motorola
The Pace-Setting Performance and Features of the 56F8300 Hybrid Controllers
The External Memory Interface:
• Can convert any internal bus memory request to a request for external memory
• Can manage multiple internal bus requests for external memory access
• Has up to eight Chip Select (CSn
) configurable outputs for external device decoding
— Each CS
can be configured for program space, data space, (both) program and data space,
or neither (disabled)
— Each CS
can be configured for read-only, write-only, or read/write access
— Each CS
can be configured for the number of wait states required for device access
— Each CS
can be configured for the size and location of its activation
— Each CS
is independently configured for setup and hold timing controls for both read and
write
• Supports disabling external P-space access if Flash Security mode is enabled on a chip
• Supports access rates up to 60MHz
• Supports accessing up to 4MB program space and an additional 32MB data space
With these features and performance, the EMI peripheral can interface to a wide variety and number of
memory mapped devices and external memory speeds without the need for external glue circuitry.
This saves on system costs, decreases part count, and improves reliability. The operation of the EMI is
completely transparent to the software, with the peripheral handling any type of transaction the core
requests.
3.2.2 Voltage Regulator and Power Supervisor
The on-board voltage regulator and power supervisor peripherals simplify board design, lower the
system cost, and improve the reliability of designs using the 56F8300. With the use of the internal
voltage regulator, the 56F8300 can be supplied using a low cost 3.3V supply and it will internally
regulate for the other voltages required to operate the internal digital core logic and internal analog
peripherals, such as the oscillator and PLL. The hardware design is further simplified by the power
supervisor peripheral, which provides power-on reset and low-voltage detection interrupts.
Some of the features and benefits of the voltage regulator are:
• Allows the entire device to be powered by a single 3.3V
• Several internal regulators available
— One for internal 56F8300 core
— One or more for internal analog circuitry
• Regulators converts 3.3V input to 2.5V operating voltage
— Reduces overall system cost
— Controls power usage
— Controls system noise floor
• I/O ports designed to interface at a TTL-compatible level
• Can be disabled to reduce power consumption
Some of the features and benefits of the power supervisor are:
• Holds device in reset until there is enough voltage (V
DD
> 1.8V) for on-chip logic to operate at
the oscillator frequency
— Precludes any problems associated with false restart
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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