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LAN9117 데이터시트(PDF) 12 Page - Microchip Technology

부품명 LAN9117
부품 상세설명  High Performance Single-Chip 10/100 Non-PCI Ethernet Controller
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9117 데이터시트(HTML) 12 Page - Microchip Technology

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LAN9117
DS00002267A-page 12
 2005-2016 Microchip Technology Inc.
100, 99,
98
General Purpose I/O
data,
nLED1 (Speed
Indicator),
nLED2 (Link &
Activity Indicator),
nLED3 (Full-
Duplex Indicator).
GPIO[2:0]/
LED[3:1]
IS/O12/
OD12
3
General Purpose I/O data: These
three general-purpose signals are fully
programmable as either push-pull
output, open-drain output or input by
writing the GPIO_CFG configuration
register in the CSR’s. They are also
multiplexed as GP LED connections.
GPIO signals are Schmitt-triggered
inputs. When configured as LED
outputs these signals are open-drain.
nLED1 (Speed Indicator). This signal
is driven low when the operating speed
is 100Mbs, during auto-negotiation and
when the cable is disconnected. This
signal is driven high only during 10Mbs
operation.
nLED2 (Link & Activity Indicator).
This signal is driven low (LED on)
when the LAN9117 detects a valid link.
This signal is pulsed high (LED off) for
80mS whenever transmit or receive
activity is detected. This signal is then
driven low again for a minimum of
80mS, after which time it will repeat the
process if TX or RX activity is detected.
Effectively, LED2 is activated solid for a
link. When transmit or receive activity
is sensed LED2 will flash as an activity
indicator.
nLED3 (Full-Duplex Indicator). This
signal is driven low when the link is
operating in full-duplex mode.
10
RBIAS
RBIAS
AI
1
PLL Bias: Connect to an external
12.0K ohm 1.0% resistor to ground.
Used for the PLL Bias circuit.
9
Test Pin
ATEST
I
1
This pin must be connected to VDD for
normal operation.
2
Internal Regulator
Power
VREG
P
1
3.3V input for internal voltage regulator
20,28,3
5,
42,48,5
5,61,97
+3.3V I/O Power
VDD_IO
P
8
+3.3V I/O logic power supply pins
19,27,3
4,41,47,
54,60,9
6
I/O Ground
GND_IO
P
8
Ground for I/O pins
81,85,8
9
+3.3V Analog Power
VDD_A
P
3
+3.3V Analog power supply pins. See
Note 2-1
77,80,8
6,88
Analog Ground
VSS_A
P
4
Ground for analog circuitry
3,65
Core Voltage
Decoupling
VDD_CORE
P
2
1.8 V from internal core regulator. Both
pins must be connected together
externally and then tied to a 10uF 0.1-
Ohm ESR capacitor, in parallel with a
0.01uF capacitor to Ground next to
each pin. These pins must not be used
to supply power to other external
devices. See Note 2-1
TABLE 2-5:
SYSTEM AND POWER SIGNALS (CONTINUED)
Pin No.
Name
Symbol
Buffer
Type
# Pins
Description


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