參數(shù)資料
型號(hào): MPC8347EVRADFA
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 266 MHz, MICROPROCESSOR, PBGA620
封裝: 29 X 29 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-620
文件頁(yè)數(shù): 33/108頁(yè)
文件大小: 1172K
代理商: MPC8347EVRADFA
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 1
30
Freescale Semiconductor
Ethernet: Three-Speed Ethernet, MII Management
Figure 11 shows the MII receive AC timing diagram.
Figure 11. MII Receive AC Timing Diagram
8.2.3
TBI AC Timing Specifications
This section describes the TBI transmit and receive AC timing specifications.
8.2.3.1
TBI Transmit AC Timing Specifications
Table 28 provides the TBI transmit AC timing specifications.
Table 28. TBI Transmit AC Timing Specifications
At recommended operating conditions with LVDD / OVDD of 3.3 V ± 10%.
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
GTX_CLK clock period
tTTX
—8.0
ns
GTX_CLK duty cycle
tTTXH/tTTX
40
60
%
GTX_CLK to TBI data TXD[7:0], TX_ER, TX_EN delay
tTTKHDX
1.0—
5.0ns
GTX_CLK clock rise, VIL(min) to VIH(max)
tTTXR
——
1.0
ns
GTX_CLK clock fall time, VIH(max) to VIL(min)
tTTXF
——
1.0
ns
GTX_CLK125 reference clock period
tG125
2
—8.0
ns
GTX_CLK125 reference clock duty cycle
tG125H/tG125
45
55
ns
Notes:
1. The symbols for timing specifications follow the pattern of 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, tTTKHDV symbolizes the TBI transmit
timing (TT) with respect to the time from tTTX (K) going high (H) until the referenced data signals (D) reach the valid state (V)
or setup time. Also, tTTKHDX symbolizes the TBI transmit timing (TT) with respect to the time from tTTX (K) going high (H) until
the referenced data signals (D) reach the invalid state (X) or hold time. In general, the clock reference symbol is based on
three letters representing the clock of a particular function. For example, the subscript of tTTX represents the TBI (T) transmit
(TX) clock. For rise and fall times, the latter convention is used with the appropriate letter: R (rise) or F (fall).
2. This symbol represents the external GTX_CLK125 and does not follow the original symbol naming convention
RX_CLK
RXD[3:0]
tMRDXKH
tMRX
tMRXH
tMRXF
RX_DV
RX_ER
tMRDVKH
Valid Data
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