參數(shù)資料
型號: MC8640DTHX1250HE
廠商: Freescale Semiconductor
文件頁數(shù): 61/130頁
文件大?。?/td> 0K
描述: IC DUAL CORE PROCESSOR 1023-CBGA
標準包裝: 1
系列: MPC86xx
處理器類型: 32-位 MPC86xx PowerPC
速度: 1.25GHz
電壓: 1.05V
安裝類型: 表面貼裝
封裝/外殼: 1023-BCBGA,F(xiàn)CCBGA
供應(yīng)商設(shè)備封裝: 1023-FCCBGA(33x33)
包裝: 托盤
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
36
Freescale Semiconductor
Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management
Figure 17 shows the TBI receive AC timing diagram.
Figure 17. TBI Receive AC Timing Diagram
8.2.5
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] = 1 a 125-MHz TBI receive clock
is supplied on 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.
A summary of the single-clock TBI mode AC specifications for receive appears in Table 34.
Table 34. TBI single-clock Mode Receive AC Timing Specification
At recommended operating conditions with L/TVDD of 3.3 V ± 5% and 2.5 V ± 5%.
Parameter
Symbol
Min
Typ
Max
Unit
RX_CLK clock period
tTRR
1
1 ±100 ppm tolerance on RX_CLK frequency
7.5
8.0
8.5
ns
RX_CLK duty cycle
tTRRH/tTRR
40
50
60
%
RX_CLK peak-to-peak jitter
tTRRJ
250
ps
Rise time RX_CLK (20%–80%)
tTRRR
——
1.0
ns
Fall time RX_CLK (80%–20%)
tTRRF
——
1.0
ns
RCG[9:0] setup time to RX_CLK rising edge
tTRRDVKH
2.0
ns
RCG[9:0] hold time to RX_CLK rising edge
tTRRDXKH
1.0
ns
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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