MPC8255ACZUMHBB Freescale Semiconductor, MPC8255ACZUMHBB Datasheet - Page 16

• Manufacturer Part Number: MPC8255ACZUMHBB
• Description: IC MPU POWERQUICC II 480-TBGA
• Manufacturer: Freescale Semiconductor

Specifications of MPC8255ACZUMHBB

• Processor Type: MPC82xx PowerQUICC II 32-bit
• Speed: 266MHz
• Voltage: 2V
• Mounting Type: Surface Mount
• Package / Case: 480-TBGA
• Family Name: MPC82XX
• Device Core: PowerQUICC II
• Device Core Size: 32b
• Frequency (max): 266MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 2V
• Operating Supply Voltage (max): 2.1V
• Operating Supply Voltage (min): 1.9V
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 480
• Package Type: TBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: Not Compliant

Clock Configuration Modes
1.3
To configure the main PLL multiplication factor and the core, CPM, and 60x bus frequencies, the
MODCK[1–3] pins are sampled while HRESET is asserted. Table 12 shows the eight basic configuration
modes. Another 49 modes are available by using the configuration pin (RSTCONF) and driving four pins
on the data bus.
1.3.1
Table 12 describes default clock modes for the MPC8255.
Clock Configuration Modes
Local Bus Mode
1:2, 1:3, 1:4, 1:5, 1:6
CLKin
CLKin
CLKin
PLL Clock Ratio
Figure 11 is a graphical representation of Table 11.
The UPM machine outputs change on the internal tick determined by the
memory controller programming; the AC specifications are relative to the
internal tick. Note that SDRAM and GPCM machine outputs change on
CLKin’s rising edge.
Figure 11. Internal Tick Spacing for Memory Controller Signals
1:2.5
1:3.5
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
T1
T1
T1
Table 11. Tick Spacing for Memory Controller Signals
Freescale Semiconductor, Inc.
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T2
T2
T2
MPC8255 Hardware Specifications
1/4 CLKin
3/10 CLKin
4/14 CLKin
Tick Spacing (T1 Occurs at the Rising Edge of CLKin)
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T3
T3
T3
T2
NOTE
T4
T4
T4
1/2 CLKin
1/2 CLKin
1/2 CLKin
T3
for 1:2, 1:3, 1:4, 1:5, 1:6
for 1:2.5
for 1:3.5
3/4 CLKin
8/10 CLKin
11/14 CLKin
T4