MSC8154E Datasheet, PDF (34/68 Pages) Freescale Semiconductor, Inc – Quad-Core Digital Signal Processor with Security

Electrical Characteristics
Table 14. Serial RapidIO Receiver DC Specifications
Parameter
Differential input voltage
Notes: 1. Measured at receiver.
Symbol
V_IN
Min
Typical
Max
200
—
1600
Units
mVp-p
Notes
1
2.5.3.4 DC-Level Requirements for SGMII Configurations
Note: Specifications are valid at the recommended operating conditions listed in Table 3
Table 15 describes the SGMII SerDes transmitter AC-coupled DC electrical characteristics. Transmitter DC characteristics are
measured at the transmitter outputs (SR[1–2]_TX[n] and SR[1–2]_TX[n]) as shown in Figure 10.
Table 15. SGMII DC Transmitter Electrical Characteristics⁵
Parameter
Symbol
Min
Typ
Max
Unit
Notes
DC Input voltage range
—
N/A
—
1
Input differential voltage
LSTS = 0
V_{RX_DIFFp-p}
100
—
1200
mV
2, 4
LSTS = 1
175
—
Loss of signal threshold
LSTS = 0
VLOS
30
—
100
mV
3, 4
LSTS = 1
65
—
175
Receiver differential input impedance
Z_{RX_DIFF}
80
—
120
W
—
Notes: 1. Input must be externally AC-coupled.
2. V_{RX_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 the PCI Express interface.
Refer to the PCI Express Differential Receiver (RX) Input Specifications section of the PCI Express Specification document. for
details.
4. The LSTS shown in the table refers to the LSTSAB or LSTSEF bit fields of the SerDes Control Register.
5. The supply voltage is 1.0 V.
SGMII SerDes
Interface
50 Ω ^{SR[1–2]_TXn}
Transmitter
50 Ω
SR[1–2]_TXn
50 Ω
50 Ω
V_os
V_OD
Figure 10. SGMII Transmitter DC Measurement Circuit
MSC8154E Quad-Core Digital Signal Processor with Security Data Sheet, Rev. 0
34
Freescale Semiconductor