RB5C396 Ricoh Corporation, RB5C396 Datasheet - Page 56

• Manufacturer Part Number: RB5C396
• Description: PC Card Controller Compliant With Pcmcia 2.1/jeida 4.2
• Manufacturer: Ricoh Corporation

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VCC3EN#, VCC5EN#, VPP_EN0, and VPP_EN1. Set the VCC3EN# pin to “0” by controlling the internal register in
case of that the 3.3V is supplied to the power supply (VCC_SLOT) of the PC card slots. Set the VCC5EN# pin to “0”
by controlling the internal register in case of that the 5.0V is supplied to the power supply (VCC_SLOT) of the PC
card slots. Both the VCC3EN# and VCC5EN# cannot be set to “0” simultaneously.
VPP of the PC card slots. Set the VPP_EN1 pin to “1” by controlling the internal register in case of that the VPP
(12V) is supplied to the VPP of the PC card slots. Both the VPP_EN0 and VPP_EN1 pins may be set to “1” simulta-
neously under certain register settings, thus requiring due attention in either hardware or software design.
(VPP1 and VPP2). On the contrary, the RF5C296 and the RF5C396 have the two VPP_EN pins and provide simulta-
neous control over the VPP1 and VPP2 pins.
by the VPP_EN0 and VPP_EN1 pins, respectively, provided that both the VPP1 and VPP2 must be provided with
either the 5V or 12V power supply without fail.
Mixed Voltage Control Register (Index : 2Fh).
and VPP2) on the PC card slots. Power supply circuitry for the RF5C296 and the RF5C396 is exemplified in the dia-
grams below :
RF5C296/RF5C396L/RB5C396/RF5C396
VCC3EN#
VCC5EN#
The RF5C296 and the RF5C396 are designed to have their power supply system controlled by four output pins :
Set the VPP_EN0 pin to “1” by controlling the internal register in case of that the VPP (5V) is supplied to the
The Intel 82365SL has the four VPP_EN pins and provides separate control over the two power supply pins
As an alternative measure, the RF5C296 and the RF5C396 allow separate control over the VPP1 and VPP2 pins
These four output pins are controlled by the Power and RESETDRV Control Register (Index : 02h) and the
These pins can be used to configure an external driver for applying voltage to the two power supply pins (VPP1
5V
5V
3.3V
PC Card
VCC
VPP_EN0
VPP_EN1
PC Card
VCC
12V
PC Card
VPP