參數(shù)資料
型號: MPC8544EVTALJB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 667 MHz, RISC PROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-783
文件頁數(shù): 40/120頁
文件大?。?/td> 1321K
代理商: MPC8544EVTALJB
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
26
Freescale Semiconductor
Enhanced Three-Speed Ethernet (eTSEC), MII Management
8.3.2
SGMII Transmitter and Receiver DC Electrical Characteristics
Table 24 and Table 25 describe the SGMII SerDes transmitter and receiver AC-Coupled DC electrical
characteristics. Transmitter DC characteristics are measured at the transmitter outputs (SD2_TX[n] and
SD2_TX[n]) as depicted in Figure 8.
Table 23. SD2_REF_CLK and SD2_REF_CLK AC Requirements
Symbol
Parameter Description
Min
Typical
Max
Units
Notes
tREF
REFCLK cycle time
10 (8)
ns
1
tREFCJ
REFCLK cycle-to-cycle jitter. Difference in the period of any
two adjacent REFCLK cycles
——
100
ps
tREFPJ
Phase jitter. Deviation in edge location with respect to
mean edge location
–50
50
ps
Note:
1. 8 ns applies only when 125 MHz SerDes2 reference clock frequency is selected via cfg_srds_sgmii_refclk during POR.
Table 24. DC Transmitter Electrical Characteristics
Parameter
Symbol
Min
Typ
Max
Unit
Notes
Supply Voltage
VDD_SRDS2
0.95
1.0
1.05
V
Output high voltage
VOH
——
VOS-max + |VOD|–max/2
mV
1
Output low voltage
VOL
VOS-min –|VOD|-max/2
mV
Output ringing
VRING
——
10
%
Output differential voltage2,3,5
|VOD|
323
500
725
mV
Equalization
setting: 1.0x
296
459
665
Equalization
setting: 1.09x
269
417
604
Equalization
setting: 1.2x
243
376
545
Equalization
setting: 1.33x
215
333
483
Equalization
setting: 1.5x
189
292
424
Equalization
setting: 1.71x
162
250
362
Equalization
setting: 2.0x
Output offset voltage
VOS
425
500
577.5
mV
1, 4
Output impedance (single ended)
RO
40
60
Ω
Mismatch in a pair
ΔRO
——
10
%
Change in VOD between 0 and 1
Δ|VOD|—
25
mV
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