ZL50418GKC ZARLINK [Zarlink Semiconductor Inc], ZL50418GKC Datasheet - Page 46

• Manufacturer Part Number: ZL50418GKC
• Description: Managed 16-Port 10/100 M + 2-Port 1 G Ethernet Switch
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

When the LED_SYN pulse is asserted, the LED interface will present 256 LED clock cycles with the clock cycles
providing information for the following ports.
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Cycles #224 to 256 present data with a value of zero.
The first two bits of byte 26 provides the speed information for the Gigabit ports while the remainder of byte 26 and
byte 27 provides bist status
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12.3
The signal from the ZL50418 to the LED decoder is shown in Figure 17.
Port 0 (10/100): cycles #0 to cycle #7
Port 1 (10/100): cycles#8 to cycle #15
Port 2 (10/100): cycle #16 to cycle #23
...
Port 14(10/100): cycle #112 to cycle #119
Port 15(10/100): cycle #120 to cycle #127
Port 24 (Gigabit 1): cycle #192 to cycle #199
Port 25 (Gigabit 2): cycle #200 to cycle #207
Byte 26 (additional status): cycle #208 to cycle #215
Byte 27 (additional status): cycle #216 to cycle #223
26[0]: G0 port (1= port 24 is operating at Gigabit speed; 0= speed is either 10 or 100 Mb/s depending on
speed bit of Port 24)
26[1]: G1 port (1= port 25 is operating at Gigabit speed; 0= speed is either 10 or 100 Mb/s depending on
speed bit of Port 25)
26[2]: initialization done
26[3]: initialization start
26[4]: checksum ok
26[5]: link_init_complete
26[6]: bist_fail
26[7]: ram_error
27[0]: bist_in_process
27[1]: bist_done
LED Interface Timing Diagram
Figure 17 - Timing Diagram of LED Interface
Zarlink Semiconductor Inc.
ZL50418
46
Data Sheet
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