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參數資料
| 型號： | W89C880F |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 通信及網絡 |
| 英文描述： | 100Base-Tx/T4 Multiport Repeater Controller(100Base-Tx/T4多端口中繼器控制器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP160 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁數： | 5/26頁 |
| 文件大小： | 313K |
| 代理商： | W89C880F |
W89C880F FastMPR
Publication Release Date: January 1997
- 5 -
Revision A1
Pin Description, continued
PORT STATUS REPORT/JUMPER SETTING PINS
NAME
TP7RPT/
SRAMSEL1
NO.
145
I/O
I/O/L
DESCRIPTION
TP7 Port Status Output/SRAM interface select. After power-on
reset, this pin can sequentially output four aspects of TP7 port
status: link/activity, partition, network utilization, and jabber. When
this pin outputs the port status, it is active low. During power-on
reset, if no pull-up resistor is connected to this pin, a 32 KB
×
8
×
2 or 64 KB
×
8
×
2 SRAM interface is selected. If a pull-up resistor
is connected to this pin, then 64 KB
×
8
×
1 or 128 KB
×
8
×
1
buffer SRAM size is selected.
TP8 Port Status Output/Extension port fragment free window
select 0. After power-on reset, this pin can sequentially output four
aspects of TP8 port status: link/activity, partition, network
utilization, and jabber. When this pin outputs the port status, it is
active low. During power-on reset, regardless of whether a pull-up
resistor is connected to this pin or not, the FastMPR can select a
fragment-free window. The size of the fragment-free window is
chosen by a combination of FRAGSEL0 and FRAGSEL1.
TP9 Port Status Output/Extension port fragment-free window
select 1. After power-on reset, this pin can sequentially output four
aspects of TP9 port status: link/activity, partition, network
utilization, and jabber. When this pin outputs the port status, it is
active low. During power-on reset, whether a pull-up resistor is
connected to this pin or not, the FastMPR can select the
fragment-free window. The size of the fragment-free window is
chosen by FRAGSEL0 and FRAGSEL1as shown below ("0"
means no pull-up resistor is connected, "1" means pull-up
resistors are connected).
Window value (bytes) disable 16 64 96
FRAGSEL 0 1 0 1 0
FRAGSEL 1 1 1 0 0
This is a limited tunable latency function for cut-through operation
in filtering runt packets.
TP10 Port Status Output. After power-on reset, this pin can
sequentially output four aspects of TP10 port status: link/activity,
partition, network utilization, and jabber.
Extension port Status Output. After power-on reset, when the
extension port is enabled, BTPRPT outputs the link/activity status.
If the extension port is disabled, BTPRPT sequentially outputs the
status train of link/activity, partition, netwok utilization, and jabber
status.
During the network utilization report period, this pin has no
function. When this pin outputs the port status, it is active low.
TP8RPT/
FRAGSEL0
147
I/O/L
TP9RPT/
FRAGSEL1
148
I/O/L
TP10RPT
149
I/O/L
BTPRPT
150
I/O/L
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