参数资料
型号: MCIMX537CVV8C
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 800 MHz, RISC PROCESSOR, PBGA529
封装: 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, TEPBGA-529
文件页数: 150/172页
文件大小: 4562K
代理商: MCIMX537CVV8C
Electrical Characteristics
i.MX53 Applications Processors for Industrial Products, Rev. 3
Freescale Semiconductor
79
Figure 41. MII Serial Management Channel Timing Diagram
4.7.5.5
RMII Mode Timing
In RMII mode, FEC_TX_CLK is used as the REF_CLK which is a 50 MHz ±50 ppm continuous reference
clock. FEC_RX_DV is used as the CRS_DV in RMII, and other signals under RMII mode include
FEC_TX_EN, FEC_TXD[1:0], FEC_RXD[1:0] and optional FEC_RX_ER.
The RMII mode timings are shown in Table 55 and Figure 42.
M13
FEC_MDIO (input) to FEC_MDC rising edge hold
0
ns
M14
FEC_MDC pulse width high
40
%
60% FEC_MDC period
M15
FEC_MDC pulse width low
40
%
60% FEC_MDC period
1 Test conditions: 25pF on each output signal.
Table 55. RMII Signal Timing
No.
Characteristics1
Min
Max
Unit
M16
REF_CLK(FEC_TX_CLK) pulse width high
35%
65%
REF_CLK period
M17
REF_CLK(FEC_TX_CLK) pulse width low
35%
65%
REF_CLK period
M18
REF_CLK to FEC_TXD[1:0], FEC_TX_EN invalid
2
ns
M19
REF_CLK to FEC_TXD[1:0], FEC_TX_EN valid
16
ns
Table 54. MII Transmit Signal Timing (continued)
ID
Characteristics1
Min
Max
Unit
FEC_MDC (output)
FEC_MDIO (output)
M14
M15
M10
M11
M12
M13
FEC_MDIO (input)
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