參數(shù)資料
型號(hào): MPC885ZP80
廠商: Freescale Semiconductor
文件頁數(shù): 70/87頁
文件大小: 0K
描述: IC MPU POWERQUICC 80MHZ 357PBGA
標(biāo)準(zhǔn)包裝: 44
系列: MPC8xx
處理器類型: 32-位 MPC8xx PowerQUICC
速度: 80MHz
電壓: 3.3V
安裝類型: 表面貼裝
封裝/外殼: 357-BBGA
供應(yīng)商設(shè)備封裝: 357-PBGA(25x25)
包裝: 托盤
MPC885/MPC880 PowerQUICC Hardware Specifications, Rev. 7
72
Freescale Semiconductor
FEC Electrical Characteristics
Figure 73 shows MII receive signal timing.
Figure 73. MII Receive Signal Timing Diagram
15.2
MII and Reduced MII Transmit Signal Timing
The transmitter functions correctly up to a MII_TX_CLK maximum frequency of 25 MHz + 1%. The
RMII transmitter functions correctly up to a RMII_REFCLK maximum frequency of 50 MHz + 1%.
There is no minimum frequency requirement. In addition, the processor clock frequency must exceed the
MII_TX_CLK frequency 1%.
Table 35 provides information on the MII and RMII transmit signal timing.
Table 35. MII Transmit Signal Timing
Num
Characteristic
Min
Max
Unit
M5
MII_TX_CLK to MII_TXD[3:0], MII_TX_EN, MII_TX_ER invalid
5
ns
M6
MII_TX_CLK to MII_TXD[3:0], MII_TX_EN, MII_TX_ER valid
25
ns
M20_RMII
RMII_TXD[1:0], RMII_TX_EN to RMII_REFCLK setup
4
ns
M21_RMII
RMII_TXD[1:0], RMII_TX_EN data hold from RMII_REFCLK rising
edge
2—
ns
M7
MII_TX_CLK and RMII_REFCLK pulse width high
35%
65%
MII_TX_CLK or
RMII_REFCLK
period
M8
MII_TX_CLK and RMII_REFCLK pulse width low
35%
65%
MII_TX_CLK or
RMII_REFCLK
period
M1
M2
MII_RX_CLK (Input)
MII_RXD[3:0] (Inputs)
MII_RX_DV
MII_RX_ER
M3
M4
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