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MDIO
MDC
LS1028A
REFCLK_P/N
3V3
1V0
RST_QSGMII
SYSTEM
CPLD
3V3
P0_D0P/N
P0_D1P/N
P0_D3P/N
P0_D2P/N
MDINT
NRE SET
VDDA
VDD
4.7K
2V5
2V5
2V5
10K DNP
10K DNP
10K
10K DNP
R177
R178
R185
R180
R182
R178 : P HY ADDR ES S [4:2] = ‘b100
PHY #2
PHY #2
GPIO1_25
RJ -45 with
Transformer
1GB
ACT
1.5K
1.5K
4.7K
#1
NXP F104S8A
138-PIN QFN
EMI1_MDIO
EMI1_MDC
SERDES RX
(LANE -B)
TX
TRANSLATOR
MAX14591
1.8V 2.5V
PHYADDR2
PHYADDR3
PHYADDR4
10K DNP
R179
10K DNP
2V5
VDD25
VDDA25
IDT
CLKGEN
5P49V5907B520NDGI
RDP/N_0
TDP/N_0
RJ -45 with
Transformer
1GB
ACT
#2
RJ -45 with
Transformer
1GB
ACT
#3
RJ -45 with
Transformer
1GB
ACT
#4
P1_D0P/N
P1_D1P/N
P1_D3P/N
P1_D2P/N
P2_D0P/N
P2_D1P/N
P2_D3P/N
P2_D2P/N
P3_D0P/N
P3_D1P/N
P3_D3P/N
P3_D2P/N
OUT1 (LVDS)
100MHz
Figure 12. QSGMII port
Table 9. Hardware bootstrap settings for QSGMII PHY
Setting
Description
PHY_AD[4:2]
PHY address = 0b100
MODE
• REFCLK_SEL[1:0] = 00: 125 MHz is used as REFCLK.
• COMA_MODE = 0: PHY comes out of reset as soon as
reset is de-asserted.
2.8.3 IEEE 1588 interface
The LS1028A processor provides support for the IEEE 1588
™
precision time protocol (PTP), which works in tandem with ENETC
to time-stamp the incoming packets. A 12-pin header (J11) is provided on the board to allow support for 1588 protocol. The SMA
connector (J12) is used to analyze time synchronization by measuring the pulse per second (PPS) signal. A 6-pin header (J13)
is used to access TSN switch 1588 pins and IEEE 1722 pins.
Ethernet controller interface
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
NXP Semiconductors
COMPANY CONFIDENTIAL
29
Содержание QorIQ LS1028A
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