VSC8641XKO Vitesse Semiconductor Corp, VSC8641XKO Datasheet - Page 31

• Manufacturer Part Number: VSC8641XKO
• Description: IC PHY 10/100/1000 100-LQFP
• Manufacturer: Vitesse Semiconductor Corp
• Type: PHY Transceiverr

Specifications of VSC8641XKO

• Number Of Drivers/receivers: 1/1
• Protocol: Gigabit Ethernet
• Voltage - Supply: 2.5V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Case: TQFP
• Dc: 07+
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 907-1031

Figure 11.
Figure 12.
3.12
3.12.1
Revision 4.3
August 2009
MDINT Configured as an Open-Drain (Active-Low) Pin
Alternatively, each MDINT pin can be configured for open-source (active-high) by tying
the pin to a pull-down resistor and to VSS. The following illustration shows this
configuration.
MDINT Configured as an Open-Source (Active-High) Pin
When a PHY generates an interrupt, the MDINT pin is asserted (driven high or low,
depending on resistor connection) if the interrupt pin enable bit (MII Register 25.15) is
set.
LED Interface
The VSC8641 device drives up to four LEDs directly. All LED outputs are active-low and
are driven using 3.3 V from the VDD33 power supply. When active, the pins are mainly
used to sink current of the cathode side of an LED, but the pins can also supply source
power to the anode portion of LEDs when they are not in the active state. This allows
for two LED pins to be used to drive a multi-status, bi-colored LED.
Simple or Enhanced LED Method
The VSC8641 provides two methods for controlling its LEDs: simple or enhanced. The
simple LED method is backward-compatible to the LED control found in prior Vitesse
Ethernet PHY devices. The simple LED method eases software backward compatibility
for customers switching to the VSC8641. The simple LED method is controlled by MII
Register 27 and is enabled by default.
Interrupt Pin Enable
(MII Register 25.15)
(MII Register 26.15)
Interrupt Pin Status
Interrupt Pin Enable
(MII Register 25.15)
(MII Register 26.15)
Interrupt Pin Status
MDINT
MDINT
VDDIO
VDDIO
External Pull-Down at
(to Station Manager)
at Station Manager
(to Station Manager)
(Active Low Mode)
(Active-High Mode)
External Pull-up
Station Manager
for Open Source
for Open-Drain
MDINT
MDINT
Functional Descriptions
VSC8641 Datasheet
Page 31