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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)： | 17/29頁 |
| 文件大?。?/td> | 202K |
| 代理商： | IP175 |
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IP175
Power on Diagnostic of LED
Preliminary, Specification
subject to change without notice
17
IP175-DS-P05
Jul. 19, 2002
(Link, Act, Fdx and Speed LED are all the same during
this period)
(0) T = 0 sec
(1) T = 0.25 sec
(2) T = 0.50 sec
(3) T = 0.75 sec
(4) T = 1.00 sec
(5) T = 1.25 sec
(6) T = 1.50 sec
(7) T = 1.75 sec
(8) T = 2.00 sec
(9) T = 2.25 sec
(10) After T = 2.5 sec, LED becomes normal operation
LED_SPEED
LED_FULL
LED_ACT
LED_LINK
LED and Initial Value Setting
IP175 supports two ways to modify its initial values of
operation parameters to fit different applications. It read
the initial value via pins or EPROM interface.
Initial Value Set Via Pins
To set the parameter via pins, connect them to vcc or
ground through resistors. IP175 reads initial value via
pins during the period of reset. An initial value is set to
1’b1 (1’b0) by connecting a pin to vcc (gnd) through a
10k
(1k
) resistor as shown on the following figure.
The function begins after the internal PLL clock active. To
make sure the proper operation of PLL, the duration of
reset must be no less than 1 ms. If there is no setting
resistor, IP175 uses the default value.
IP175 reads initial setting via pins during the period of
reset. At reset, these pins are input signals and IP175
reads the initial value. After reset, LED pins become
output signals and show LED functions at normal mode.
The application circuit is shown below.
To set initial value = 1
with pull up 10K ohm resister
To set initial value = 0
with pull down 1K ohm resister
LED PIN
2.5V
10K
220
LED PIN
1K
2.5V
220
To use default value
(use no resistor to leave it open)
LED PIN
2.5V
220
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