參數(shù)資料
型號: KMPC8544EVTAQG
廠商: Freescale Semiconductor
文件頁數(shù): 39/117頁
文件大?。?/td> 0K
描述: IC MPU POWERQUICC III 783-PBGA
標(biāo)準(zhǔn)包裝: 5
系列: MPC85xx
處理器類型: 32-位 MPC85xx PowerQUICC III
速度: 1.0GHz
電壓: 1V
安裝類型: 表面貼裝
封裝/外殼: 783-BBGA,F(xiàn)CBGA
供應(yīng)商設(shè)備封裝: 783-FCPBGA(29x29)
包裝: 托盤
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 6
28
Freescale Semiconductor
Enhanced Three-Speed Ethernet (eTSEC), MII Management
8.4
SGMII AC Timing Specifications
This section describes the SGMII transmit and receive AC timing specifications. Transmitter and receiver
characteristics are measured at the transmitter outputs (SD2_TX[n] and SD2_TX[n]) or at the receiver
inputs (SD2_RX[n] and SD2_RX[n]) as depicted in Figure 10, respectively.
8.4.1
SGMII Transmit AC Timing Specifications
Table 26 provides the SGMII transmit AC timing targets. A source synchronous clock is not provided.
Input differential voltage
LSTS = 0
Vrx_diffpp
100
1200
mV
2, 4
LSTS = 1
175
Loss of signal threshold
LSTS = 0
Vlos
30
100
mV
3, 4
LSTS = 1
65
175
Input AC common mode voltage
Vcm_acpp
——
100
mV
5.
Receiver differential input impedance
Zrx_diff
80
120
Ω
Receiver common mode input impedance
Zrx_cm
20
35
Ω
Common mode input voltage
Vcm
xcorevss
xcorevss
V
6
Notes:
1. Input must be externally AC-coupled.
2. VRX_DIFFp-p is also referred to as peak-to-peak input differential voltage
3. The concept of this parameter is equivalent to the electrical idle detect threshold parameter in PCI Express. Refer to
4. The LSTS shown in this table refers to the LSTSCD bit field of MPC8544E SerDes 2 control register 1.
5. VCM_ACp-p is also referred to as peak-to-peak AC common mode voltage.
6. On-chip termination to SGND_SRDS2 (xcorevss).
Table 26. SGMII Transmit AC Timing Specifications
At recommended operating conditions with XVDD_SRDS2 = 1.0 V ± 5%.
Parameter
Symbol
Min
Typ
Max
Unit
Notes
Deterministic jitter
JD
0.17
UI p-p
Total jitter
JT
0.35
UI p-p
Unit interval
UI
799.92
800
800.08
ps
2
VOD fall time (80%–20%)
tfall
50
120
ps
VOD rise time (20%–80%)
trise
50
120
ps
Notes;
1. Source synchronous clock is not supported.
2. Each UI value is 800 ps ± 100 ppm.
Table 25. DC Receiver Electrical Characteristics (continued)
Parameter
Symbol
Min
Typ
Max
Unit
Notes
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