MCF54452VR266 Freescale Semiconductor, MCF54452VR266 Datasheet - Page 25

• Manufacturer Part Number: MCF54452VR266
• Description: IC MPU 32BIT 266MHZ 360TEPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF5445xr

Specifications of MCF54452VR266

• Core Processor: Coldfire V4
• Core Size: 32-Bit
• Speed: 266MHz
• Connectivity: I²C, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, WDT
• Number Of I /o: 132
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.35 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 360-TEPBGA
• Family Name: MCF5445X
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 266MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Supply Voltage (max): 1.65/3.6V
• Operating Supply Voltage (min): 1.35/3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 360
• Package Type: TEBGA
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• For Use With: M54455EVB - BOARD EVAL FOR MCF5445X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Compliant

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DD10 Input Data Hold Relative to DQS.
Num
DD1
DD2
DD3
DD4
DD5
DD6
DD7
DD8
DD9
5.8
The following timing numbers must be followed to properly latch or drive data onto the SDRAM memory bus. All timing
numbers are relative to the four DQS byte lanes.
Freescale Semiconductor
The SDRAM interface operates at the same frequency as the internal system bus.
Pulse width high plus pulse width low cannot exceed min and max clock period.
Command output valid should be 1/2 the memory bus clock (t
voltage variations.
This specification relates to the required input setup time of DDR memories. The microprocessor’s output setup should be larger
than the input setup of the DDR memories. If it is not larger, then the input setup on the memory is in violation.
SD_D[31:24] is relative to SD_DQS[3]; SD_D[23:16] is relative to SD_DQS[2]
The first data beat is valid before the first rising edge of DQS and after the DQS write preamble. The remaining data beats are valid
for each subsequent DQS edge.
This specification relates to the required hold time of DDR memories.
SD_D[31:24] is relative to SD_DQS[3]; SD_D[23:16] is relative to SD_DQS[2]
Data input skew is derived from each DQS clock edge. It begins with a DQS transition and ends when the last data line becomes
Data input hold is derived from each DQS clock edge. It begins with a DQS transition and ends when the first data line becomes
invalid.
valid. This input skew must include DDR memory output skew and system level board skew (due to routing or other factors).
Frequency of Operation
Clock Period
Pulse Width High
Pulse Width Low
Address, SD_CKE, SD_CAS, SD_RAS, SD_WE,
SD_CS[1:0] — Output Valid
Address, SD_CKE, SD_CAS, SD_RAS, SD_WE,
SD_CS[1:0] — Output Hold
Write Command to first DQS Latching Transition
Data and Data Mask Output Setup (DQ-->DQS)
Relative to DQS (DDR Write Mode)
Data and Data Mask Output Hold (DQS-->DQ)
Relative to DQS (DDR Write Mode)
Input Data Skew Relative to DQS (Input Setup)
SDRAM AC Timing Characteristics
Characteristic
MCF5445x ColdFire
Table 13. SDRAM Timing Specifications
®
Microprocessor Data Sheet, Rev. 6
SDCK
Symbol
t
t
t
t
SDCKH
SDCKL
t
t
SDCK
DQSS
CMV
CMH
t
t
t
t
QS
QH
IS
IH
) plus some minor adjustments for process, temperature, and
(0.25 x t
(1.0 x t
+ 0.5ns
- 0.6ns
0.45
0.45
Min
7.5
2.0
1.0
1.0
60
—
—
SDCK
SDCK
)
)
(0.5 x t
(1.0 x t
+ 1.0ns
+ 0.6ns
133.33
16.67
Max
0.55
0.55
1.0
—
—
—
—
Electrical Characteristics
SDCK
SDCK
)
)
t
t
Unit
MHz
SDCK
SDCK
ns
ns
ns
ns
ns
ns
ns
ns
Notes
3
25
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