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参数资料
型号： MPC8315VRAGDA
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, PBGA620
封装： 29 X 29 MM, 2.23 MM HEIGHT, 1 MM PITCH, LEAD FREE, TEPBGAII-620
文件页数： 44/112页
文件大小： 1283K
代理商： MPC8315VRAGDA
MPC8315E PowerQUICC II Pro Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
37
Ethernet: Three-Speed Ethernet, MII Management
9.5.4
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 (TX[n] and TX[n]) or at the receiver inputs (RX[n]
and RX[n]) as depicted in Figure 21 respectively.
9.5.4.1
SGMII Transmit AC Timing Specifications
Table 37 provides the SGMII transmit AC timing targets. A source synchronous clock is not provided.
Loss of signal threshold
EQ = 0
VLOS
30
—
100
mV
3, 4
EQ = 1
65
—
175
Input AC common mode voltage
VCM_ACp-p
—
100
mV
5
Receiver differential input impedance
ZRX_DIFF
80
100
120
Ω
—
Receiver common mode input
impedance
ZRX_CM
20
—
35
Ω
—
Common mode input voltage
VCM
—Vxcorevss
—V
6
Note:
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 PCI
Express Differential Receiver (RX) Input Specifications section for further explanation.
4. The EQ shown in the table refers to the RXEQA or RXEQE bit field of MPC8315E’s SerDes Control Register 0.
5. VCM_ACp-p is also referred to as peak to peak AC common mode voltage.
6. On-chip termination to XCOREVSS.
Table 37. SGMII Transmit AC Timing Specifications
At recommended operating conditions with XCOREVDD = 1.0V ± 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
—
VOD fall time (80%-20%)
tfall
50
—
120
ps
—
VOD rise time (20%-80%)
trise
50
—
120
ps
—
Notes:
1. Each UI is 800 ps ± 100 ppm.
Table 36. SGMII DC Receiver Electrical Characteristics (continued)
Parameter
Symbol
Min
Typ
Max
Unit
Notes
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