adm6999ux Infineon Technologies Corporation, adm6999ux Datasheet - Page 52

• Manufacturer Part Number: adm6999ux
• Description: Adm6999u 9 Port 10/100 Mb/s Single Chip Ethernet Switch Controller
• Manufacturer: Infineon Technologies Corporation

Total Buffer Threshold Control Register
TBTCR
Total Buffer Threshold Control Register
Field
FQMC
FQM
TBTC
PBTC
Dynamic threshold management: Bit[13]: The add bit. Bit[12:8]: The offset bits.When Bit[13] = 1, the switch will
use the value (buffers really used + 8*bit[12:8]) as the buffer count that the switch has used.When Bit[13] = 0, the
switch will use the value (buffers really used - 8*bit[12:8]) as the buffer count that the switch has used.Fixed
threshold management:Bit[13]: This bit doesn't affect the threshold.Bit[12:8]: The total buffer threshold bits.
Data Sheet
Bits
15
14
13:8
7:0
Type
rw
rw
rw
rw
Description
Fix Queue Management for the Casecade port
0
Fix Queue Management
0
Total Buffer Threshold Control
Expansion Port Buffer Threshold Control
The configuration is the same as the other ports.
B
B
, default
, default
Offset
27
52
H
Rev. 1.42, 2005-11-25
ADM6999U/UX
Data Sheet
Descriptions
Reset Value
0000
H