cp2200 Silicon Laboratories, cp2200 Datasheet - Page 21

• Manufacturer Part Number: cp2200
• Description: Single-chip Ethernet Controller
• Manufacturer: Silicon Laboratories

6.5. LED Control
The CP2200/1 can be used to control link status and activity LEDs. The CP2200 (48-pin TQFP) has two push-pull
LED drivers that can source up to 10 mA each. The CP2201 (28-pin QFN) has a single push-pull LED driver that
turns the LED on or off based on the link status and blinks the LED when activity is detected on a good link. Table 9
shows the function of the LED signals available on the CP2200/1.
Figure 12 shows a typical LED connection for the CP2200. The CP2201 uses an identical connection for the LA
(link/activity) pin. The LED drivers are enabled and disabled using the IOPWR register on page 45.
Signal
LINK
ACT
LA
CP2200
CP2200
CP2201
Device
LINK
Figure 12. LED Control Example (CP2200)
ACT
Table 9.
Asserted when valid link pulses are detected.
Asserted for 50 ms for each packet transmitted or received.
Asserted when valid link pulses are detected and toggled for 50 ms for
each packet transmitted or received.
LED
Rev. 1.0
Control Signals
Description
CP2200/1
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