MSC8156E_11 Datasheet, PDF (34/68 Pages) Freescale Semiconductor, Inc – Six-Core Digital Signal Processor with Security

Electrical Characteristics
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
Table 16 describes the SGMII SerDes receiver AC-coupled DC electrical characteristics.
Table 16. SGMII DC Receiver Electrical Characteristics⁵
Parameter
Symbol Min Typ
Max
Unit
Notes
DC Input voltage range
—
N/A
—
1
Input
SRDSnCR4[EICE{12:10}] = 0b001 for SGMII1 V_{RX_DIFFp-p} 100
—
1200
mV
2, 4
differential SRDSnCR4[EICF{4:2}] = 0b001 for SGMII2
voltage
SRDSnCR4[EICE{12:10}] = 0b100 for SGMII1
175
—
SRDSnCR4[EICF{4:2}] = 0b100 for SGMII2
Loss of
SRDSnCR4[EICE{12:10}] = 0b001 for SGMII1
VLOS
30
—
100
mV
3, 4
signal
SRDSnCR4[EICF{4:2}] = 0b001 for SGMII2
threshold
SRDSnCR4[EICE{12:10}] = 0b100 for SGMII1
65
—
175
SRDSnCR4[EICF{4:2}] = 0b100 for SGMII2
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 values for SGMII1 and SGMII2 are selected in the SRDS control registers.
5. The supply voltage is 1.0 V.
MSC8156E Six-Core Digital Signal Processor with Security Data Sheet, Rev. 4
34
Freescale Semiconductor