MPC855TZQ50D4 Freescale, MPC855TZQ50D4 Datasheet - Page 68

• Manufacturer Part Number: MPC855TZQ50D4
• Manufacturer: Freescale

Specifications of MPC855TZQ50D4

• Family Name: MPC8xx
• Device Core: PowerQUICC
• Device Core Size: 32b
• Frequency (max): 50MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.465/3.6V
• Operating Supply Voltage (min): 2/3.135V
• Operating Temp Range: 0C to 95C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 357
• Package Type: BGA
• Lead Free Status / RoHS Status: Not Compliant

FEC Electrical Characteristics
13.2
The transmitter functions correctly up to a MII_TX_CLK maximum frequency of 25 MHz +1%. There is
no minimum frequency requirement. In addition, the processor clock frequency must exceed the
MII_TX_CLK frequency – 1%.
Table 30
Figure 73
68
Num
M5
M6
M7
M8
MII_TX_CLK to MII_TXD[3:0], MII_TX_EN, MII_TX_ER invalid
MII_TX_CLK to MII_TXD[3:0], MII_TX_EN, MII_TX_ER valid
MII_TX_CLK pulse width high
MII_TX_CLK pulse width low
provides information on the MII transmit signal timing.
MII_TXD[3:0] (Outputs)
MII Transmit Signal Timing (MII_TXD[3:0], MII_TX_EN,
MII_TX_ER, MII_TX_CLK)
shows the MII transmit signal timing diagram.
MII_TX_CLK (Input)
RMII_REFCLK
MII_TX_EN
MII_TX_ER
MPC860 PowerQUICC™ Family Hardware Specifications, Rev. 8
Figure 73. MII Transmit Signal Timing Diagram
Characteristic
Table 30. MII Transmit Signal Timing
M5
M6
M7
M8
35%
Min
—
35
5
Freescale Semiconductor
65%
65%
Max
—
25
MII_TX_CLK
MII_TX_CLK
period
period
Unit
ns