zl50416 Zarlink Semiconductor, zl50416 Datasheet - Page 80

• Manufacturer Part Number: zl50416
• Description: Managed 16-port 10/100 M + 2-port 1 G Ethernet Switch
• Manufacturer: Zarlink Semiconductor

13.9.14
I
Accessed by CPU, serial interface and I
13.9.15
I
Accessed by CPU, serial interface and I
13.9.16
I
Accessed by CPU, serial interface and I
2
2
2
C Address h0B7, CPU Address: 50D
C Address h0B8, CPU Address 50E
C Address h0BA), CPU Address 510
Bit [7:0] :
Bit [4:0]:
Bit [7:5]:
Bit [3:0]:
Bits [7:4]:
MCC – Multicast Congestion Control
PR100 – Port Reservation for 10/100 ports
SFCB – Share FCB Size
7
FC reaction period
7
Buffer low threshold
7
Shared pool buffer size
Number of frame count. Used for best effort dropping at B% when destination
port’s best effort queue reaches UCC threshold and shared pool is all in use.
Granularity 1 frame. (Default: h10 for 2 MB or h08 for 1 MB)
In multiples of two frames (granularity). Used for triggering MC flow control
when destination port’s multicast best effort queue reaches MCC
threshold.(Default 0x10)
Flow control reaction period (Default 2) Granularity 4uSec.
Per source port buffer reservation.
Define the space in the FDB reserved for each 10/100 port and CPU.
Expressed in multiples of 4 packets. For each packet 1536 bytes are
reserved in the memory.
Expressed in multiples of 4 packets. Threshold for dropping all best effort
frames when destination port best efforts queues reaches UCC threshold,
shared pool is all used and source port reservation is at or below the
PR100[7:4] level. Also the threshold for initiating UC flow control.
•
Default:
- h58 for configuration with 2MB;
- h35 for configuration with 1MB;
5
4
Multicast congest threshold
4
2
2
2
C (R/W)
C (R/W)
C (R/W)
3
Zarlink Semiconductor Inc.
SP Buffer reservation
ZL50416
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Data Sheet