Preliminary User's Manual l MBLS1012AL UM 0001 l © 2019, TQ-Systems GmbH
Page 11
4.2.5
Gigabit Ethernet (Switch ports)
Up to four Ethernet interfaces (1000Base-T) are available via Microchip's KSZ9897 gigabit switch. Connection is via RGMII.
The switch is managed via I
2
C. In contrast to MIIM (EMI), this enables full control of the device. The connection of the EMI1 bus is
possible via assembly option. The switch has boot straps to start with configurable default values. Some boot straps can be
configured with assembly options. Further information is available in the latest circuit diagram of the MBLS1012AL.
The following table shows the pin assignment of the Ethernet connectors:
Table 10:
Pinout RJ-45 connector X12, X13 for “Switch“
Switch pin
Pin name
RJ-45 pin
Remark
Ports 4-1 Gigabit Ethernet Pins
1, 12, 24, 34
TXRX[4:1]P_A
TD0+[4:1]
–
2, 13, 25, 35
TXRX[4:1]M_A
TD0–[4:1]
–
4, 15, 26, 37
TXRX[4:1]P_B
TD1+[4:1]
–
5, 16, 27, 38
TXRX[4:1]M_B
TD1–[4:1]
–
6, 17, 28, 39
TXRX[4:1]P_C
TD2+[4:1]
–
7, 18, 29, 40
TXRX[4:1]M_C
TD2–[4:1]
–
8, 20, 31, 42
TXRX[4:1]P_D
TD3+[4:1]
–
9, 21, 32, 43
TXRX[4:1]M_D
TD3–[4:1]
–
85, 88, 91, 105
LED[4:1]_0
LED1_K[4:1]
–
86, 89, 92, 106
LED[4:1]_1
LED2_K[4:1]
–
–
–
LED1_A[4:1]
V_2V5, 100 Ω in series
–
–
LED2_A[4:1]
V_2V5, 100 Ω in series
Table 11:
Ethernet Switch, Port-Link Status information
LED1
LED2
Status
OFF
OFF
Link off
OFF
ON
1000 Mbps Link / No Activity
OFF
Blinking
1000 Mbps Link / Activity
ON
OFF
100 Mbps Link / No Activity
Blinking
OFF
100 Mbps Link / Activity
ON
ON
10 Mbps Link / No Activity
Blinking
Blinking
10 Mbps Link / Activity
The possible data throughput is influenced by the system load and the software platform used.
With the MBLS1012AL and the standard BSP, the following transfer rates can be achieved.
Table 12:
Characteristics Gigabit Ethernet (Link)
Parameter
Min.
Typ.
Max.
Unit
Upstream
–
TBD
1,000
Mbit/s
Downstream
–
TBD
1,000
Mbit/s
Illustration 9:
Position of Gigabit Ethernet X12, X13 (Switch)
