LPC47M112_07 SMSC [SMSC Corporation], LPC47M112_07 Datasheet - Page 120

• Manufacturer Part Number: LPC47M112_07
• Description: Enhanced Super I/O Controller with LPC Interface
• Manufacturer: SMSC [SMSC Corporation]

Enhanced Super I/O Controller with LPC Interface
Datasheet
The LED pins (GP60 and GP61) are able to control the LED while the part is under VTR power with VCC removed.
In order to control a LED while the part is under VTR power, the GPIO pin must be configured for the LED function
and either open drain or push-pull buffer type. In the case of open-drain buffer type, the pin is capable of sinking
current to control the LED. In the case of push-pull buffer type, the part will source current. The part is also able to
blink the LED under VTR power. The LED will not blink under VTR power (VCC removed) if the external 32kHz clock
is not connected.
The LED pins can drive a LED when the buffer type is configured to be push-pull and the part is powered by either
VCC or VTR, since the buffers for these pins are powered by VTR. This means they will source their specified current
from VTR even when VCC is present.
The LED control registers are defined in the “Runtime Register” section.
SMSC DS – LPC47M112
Page 120
Rev. 02-16-07
DATASHEET