Ricoh R5C841 Manual Do Utilizador

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2004 R

EV

. 1.10 

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Power Pin Descriptions 

REGEN# IN 

Regulator Enable: This pin controls an internal regulator. Setting this pin to ‘Low’ enables 
the internal regulator, and setting this pin to ‘High’ disables it. 

VCC_PCI3V PWR 

PCI VCC: Power Supply pins for the PCI interface signals. This pin can be powered at 3.3V.

VCC_3V PWR 

3V VCC : This supply pin is connected to 3.3V. This pin must not be off on the suspend 
mode because of the power supply for PME# and GBRST#. This pin supplies for a socket of 
the PC Card Controller also. 

VCC_MD3V PWR 

Media VCC: Power Supply pins for the Media interface signals. This pin can be powered at 
3.3V. 

VCC_RIN PWR 

Regulator Input: Power supply input pins for an internal regulator. This pin is connected to 
3.3V when an internal regulator is enabled, and to the same power as that of VCC_ROUT 
(1.8V) when the regulator is disabled.  

VCC_ROUT PWR 

Regulator Output:  Power supply output pins for an internal regulator and power supply 
pins for the internal core logic. This pin is powered as an output from an internal regulator 
and as an input to the core logic when an internal regulator enabled, and connected to 1.8V 
as input to the core logic when the regulator disabled. Add bypass condensers between this 
pin and GND.    

AVCC_PHY3V PWR 1394 PHY VCC: Power supply for PHY analog block. This pin can be powered at 3.3V. This

pin must not be off on the suspend mode because of the power supply for Cable interface 
block. 

GND PWR 

Digital GND: 

AGND PWR