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參數(shù)資料
| 型號： | IP175 |
| 英文描述： | 5-port 10/100M Single Chip Switch |
| 中文描述： | 5端口10/100M自適應(yīng)單片開關(guān) |
| 文件頁數(shù)： | 7/29頁 |
| 文件大小： | 202K |
| 代理商： | IP175 |
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IP175
PIN Description
(continued)
Pin no.
LED pins used as initial setting mode during reset
(continued)
77,78
BP_KIND[1:0]
Preliminary, Specification
subject to change without notice
7
IP175-DS-P05
Jul. 19, 2002
Label
Type
Description
IPL
Backpressure type selection
Bp_kind[1:0] are valid only if Bk_en is set to high.
00: carrier base backpressure (default)
01: collision base backpressure with hashing
10: collision base backpressure without hashing
After reset, IP175 reads EEPROM with BP_KIND[1:0], which
works as EEDO and EEDI. BP_KIND[1] is an input signal and
BP_KIND[0] is an output signal during reading EEPROM. After
finishing reading EEPROM, these two pins becomes input
signal to isolate IP175 from EEPROM
They are internally pulled low.
Turn on twopartD (Twopart)
IP175 examine the carrier for 64 bits only during its back off
period if this function is enabled. It makes IP175 have higher
priority in a collision event.
1: enable (default), 0: disable
It is internally pulled high.
Aggressive back off enable (MODBCK)
IP175 uses modified (aggressive) back off algorithm if this
function is enabled. The maximum back off period is limited to
8-slot time. It makes IP175 have higher priority in a collision
event.
1: aggressive mode enable (default),
0: standard back off
This pin doesn’t affect the external MII port. It is internally
pulled high.
Bypass scrambler (BPSCR_MODE)
1: bypass, 0: not bypass (default)
The default value must be adopted for normal operation.
It is internally pulled low.
Nodrop16 (Drop16*)
1: do not drop after 16 collisions, (default)
0: drop after 16 collision
This pin doesn’t affect the external MII port. It is internally
pulled high.
105
LED_SPEED[3]
IPH
93
LED_SPEED[1]
IPH
106
LED_LINK[4]
IPL
96
LED_LINK[2]
IPH
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