参数资料
型号: MPC8544EAVTANG
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA783
封装: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件页数: 64/128页
文件大小: 1411K
代理商: MPC8544EAVTANG
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1
40
Freescale Semiconductor
Enhanced Three-Speed Ethernet (eTSEC), MII Management
Figure 20 shows the TBI receive AC timing diagram.
Figure 20. TBI Receive AC Timing Diagram
8.7.3
TBI Single-Clock Mode AC Specifications
When the eTSEC is configured for TBI modes, all clocks are supplied from external sources to the relevant
eTSEC interface. In single-clock TBI mode, when TBICON[CLKSEL] = 1a 125-MHz TBI receive clock
is supplied on the TSECn_RX_CLK pin (no receive clock is used on TSECn_TX_CLK in this mode,
whereas for the dual-clock mode this is the PMA1 receive clock). The 125-MHz transmit clock is applied
on the TSEC_GTX_CLK125 pin in all TBI modes.
PMA_RX_CLK[0:1] duty cycle
tTRXH/tTRX
40
60
%
RCG[9:0] setup time to rising PMA_RX_CLK
tTRDVKH
2.5
ns
PMA_RX_CLK to RCG[9:0] hold time
tTRDXKH
1.5
ns
PMA_RX_CLK[0:1] clock rise time (20%-80%)
tTRXR
0.7
2.4
ns
PMA_RX_CLK[0:1] clock fall time (80%-20%)
tTRXF
0.7
2.4
ns
Note:
1. The symbols used for timing specifications herein 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, tTRDVKH symbolizes TBI
receive timing (TR) with respect to the time data input signals (D) reach the valid state (V) relative to the tTRX clock reference
(K) going to the high (H) state or setup time. Also, tTRDXKH symbolizes TBI receive timing (TR) with respect to the time data
input signals (D) went invalid (X) relative to the tTRX clock reference (K) going to the high (H) state. 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 tTRX represents the TBI (T) receive (RX) clock. For rise and fall times, the latter convention is used with the
appropriate letter: R (rise) or F (fall). For symbols representing skews, the subscript is skew (SK) followed by the clock that
is being skewed (TRX).
Table 36. TBI Receive AC Timing Specifications (continued)
At recommended operating conditions with L/TVDD of 3.3 V ± 5% or 2.5V ± 5%.
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
Notes
PMA_RX_CLK1
RCG[9:0]
tTRX
tTRXH
tTRXR
tTRXF
tTRDVKH
PMA_RX_CLK0
tTRDXKH
tTRDVKH
tTRDXKH
tSKTRX
tTRXH
Valid Data
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