M52259EVB Freescale Semiconductor, M52259EVB Datasheet - Page 32

• Manufacturer Part Number: M52259EVB
• Description: BOARD EVAL FOR 52259 COLDFIRE V2
• Manufacturer: Freescale Semiconductor
• Series: ColdFire®r
• Type: MCUr

Specifications of M52259EVB

• Contents: Board, Cables, Documentation, DVD, Flash Drive and Power Supply
• Processor To Be Evaluated: MCF52259
• Data Bus Width: 32 bit
• Interface Type: RS-232, Ethernet, USB
• Silicon Manufacturer: Freescale
• Core Architecture: Coldfire
• Core Sub-architecture: Coldfire V2
• Silicon Core Number: MCF52
• Silicon Family Name: MCF5225x
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• For Use With/related Products: MCF52259
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.9
2.10
A multi-function external bus interface called Mini-FlexBus is provided with basic functionality to interface to slave-only
devices up to a maximum bus frequency of 80MHz. It can be directly connected to asynchronous or synchronous devices such
as external boot ROMs, flash memories, gate-array logic, or other simple target (slave) devices with little or no additional
circuitry. For asynchronous devices a simple chip-select based interface can be used.
All processor bus timings are synchronous; that is, input setup/hold and output delay are given in respect to the rising edge of
a reference clock, MB_CLK. The MB_CLK frequency is half the internal system bus frequency.
The following timing numbers indicate when data is latched or driven onto the external bus, relative to the Mini-FlexBus output
clock (MB_CLK). All other timing relationships can be derived from these values.
Freescale Semiconductor
Minimum core speed for USB operation
1
2
USB Operation
Mini-FlexBus External Interface Specifications
Num
MB1
MB2
MB3
MB4
MB5
Specification is valid for all MB_A[19:0], MB_D[7:0], MB_CS[1:0], MB_OE, MB_R/W, and MB_ALE.
Specification is valid for all MB_D[7:0].
Frequency of Operation
Clock Period
Output Valid
Output Hold
Input Setup
Input Hold
Characteristic
Table 16. Mini-FlexBus AC Timing Specifications
Characteristic
Table 15. USB Operation Specifications
MCF52259 ColdFire Microcontroller, Rev. 4
12.5
f
Min
sys_USB_min
—
—
2
6
0
Symbol
Max
80
—
—
—
—
8
Value
16
MHz
Unit
Electrical Characteristics
ns
ns
ns
ns
ns
Notes
MHz
Unit
1
1
2
2
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