SCF5249VM140 FREESCALE [Freescale Semiconductor, Inc], SCF5249VM140 Datasheet - Page 11

• Manufacturer Part Number: SCF5249VM140
• Description: Integrated ColdFire Microprocessor
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

SCF5249 Functional Overview
5.16 IDE and SmartMedia Interfaces
The SCF5249 system bus allows connection of an IDE hard disk drive and SmartMedia flash card with a
minimum of external hardware. The external hardware consists of bus buffers for address and data and are
intended to reduce the load on the bus and prevent SDRAM and Flash accesses to propagate to the IDE
bus. The control signals for the buffers are generated in the SCF5249.
5.17 Analog/Digital Converter (ADC)
The four channel ADC is a based on the Sigma-Delta concept with 12-bit resolution. The digital portion
of the ADC is provided internally. The analog voltage comparator must be provided externally as well as
an external integrator circuit (resistor/capacitor) which is driven by the ADC output. A software interrupt
is provided when the ADC measurement cycle is complete.
5.18 Flash Memory Card Interface
The interface is Sony MemoryStick and SecureDigital compatible. However, there is no hardware support
for MagicGate.
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5.19 I
C Module
2
2
The two-wire I
C bus interface, which is compliant with the Philips I
C bus standard, is a bidirectional
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serial bus that exchanges data between devices. The I
C bus minimizes the interconnection between
devices in the end system and is best suited for applications that need occasional bursts of rapid
communication over short distances among several devices. Bus capacitance and the number of unique
addresses limit the maximum communication length and the number of devices that can be connected.
5.20 Chip-Selects
Two programmable chip-select outputs provide signals that enable glueless connection to external memory
and peripheral circuits. The base address, access permissions and automatic wait-state insertion are
programmable with configuration registers. These signals also interface to 16-bit ports.
CS0 is active after reset to provide boot-up from external FLASH/ROM.
5.21 GPIO Interface
A total of 44 General Purpose inputs and 46 General Purpose outputs are available. These are multiplexed
with various other signals. Eight of the GPIO inputs have edge sensitive interrupt capability.
5.22 Interrupt Controller
The interrupt controller provides user-programmable control of a total of 57 interrupts. There are 49
internal interrupt sources. In addition, there are 8 GPIOs where interrupts can be generated on the rising
or falling edge of the pin. All interrupts are autovectored and interrupt levels are programmable.
SCF5249 Integrated ColdFire® Microprocessor Data Sheet, Rev. 3
Freescale Semiconductor
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