参数资料
型号: MPC8572ECVTAVNB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1500 MHz, MICROPROCESSOR, PBGA1023
封装: 33 X 33 MM, LEAD FREE, PLASTIC, FCBGA-1023
文件页数: 66/138页
文件大小: 1502K
代理商: MPC8572ECVTAVNB
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
33
Ethernet: Enhanced Three-Speed Ethernet (eTSEC)
Figure 8. FIFO Receive AC Timing Diagram
8.2.2
GMII AC Timing Specifications
This section describes the GMII transmit and receive AC timing specifications.
8.2.2.1
GMII Transmit AC Timing Specifications
Table 26 provides the GMII transmit AC timing specifications.
Table 26. GMII Transmit AC Timing Specifications
At recommended operating conditions with LVDD/TVDD of 2.5/ 3.3 V ± 5%.
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
GMII data TXD[7:0], TX_ER, TX_EN setup time
tGTKHDV
2.5
ns
GTX_CLK to GMII data TXD[7:0], TX_ER, TX_EN delay
tGTKHDX
0.5
5.0
ns
GTX_CLK data clock rise time (20%-80%)
tGTXR
2
——
1.0
ns
GTX_CLK data clock fall time (80%-20%)
tGTXF
2
——
1.0
ns
Notes:
1. The symbols used for timing specifications herein follow the pattern t(first two letters of functional block)(signal)(state) (reference)(state)
for inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tGTKHDV symbolizes GMII
transmit timing (GT) with respect to the tGTX clock reference (K) going to the high state (H) relative to the time date input
signals (D) reaching the valid state (V) to state or setup time. Also, tGTKHDX symbolizes GMII transmit timing (GT) with
respect to the tGTX clock reference (K) going to the high state (H) relative to the time date input signals (D) going invalid (X)
or hold time. Note that, in general, the clock reference symbol representation is based on three letters representing the clock
of a particular functional. For example, the subscript of tGTX represents the GMII(G) transmit (TX) clock. For rise and fall
times, the latter convention is used with the appropriate letter: R (rise) or F (fall).
2. Guaranteed by design.
tFIR
tFIRH
tFIRF
tFIRR
RX_CLK
RXD[7:0]
RX_DV
RX_ER
valid data
tFIRDX
tFIRDV
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