RF5C396 Просмотр технического описания (PDF) - RICOH Co.,Ltd.

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RF5C396

COMPLIANT WITH PCMCA2.1/JEIDA4.2 PC CARD CONTROLLER

RICOH Co.,Ltd. 

RF5C296/RF5C396L/RB5C396/RF5C396

2. Power Management

When card slot is empty or the power supply is off, each card slot has independently power management

because each slot has its own buffers and transceivers. In order to achieve the low power consumption especially for

the notebook PCs, each address mapping circuit will be powered down when it is not activated. In addition to the

function, setting the power down bit in the global control register to “1” enables the RF5C296/RF5C396 to go into

the power down mode. There is a single power down control bit which can be written with either a Slot#0 or Slot#1

Global Control Register Index. Setting this bit to “1” goes into the power down mode. Even in the power down

mode, RF5C296/RF5C396 can generate a card status change interrupt and PC Card interrupt for I/O cards. The

RF5C296/RF5C396 can also generate the RI_OUT# signal when configured for ring indicate resume from I/O

cards. In this Power down mode, the following ISA bus signals will be ignored.

SD[15 : 0], LA[23 : 17], SA[16 : 0], IORD#, IOWR#, AEN, BALE, SYSCLK, MEMW#, MEMR#, SBHE#

3. Mixed Voltage Operation

There are three/four different power nets ; VCC for ISA bus interface, VCC for core logic, VCC for card slot

interface ; to be handled in RF5C296/RF5C396. Each of these power nets can be independently running at 3.3V or

5V. All of the voltage combinations listed on the next page are supported. RF5C296/RF5C396 can operate even with

the single power supply of 5V or 3.3V

ISA bus

VCC_AT

VCC_CORE

VCC_SLOT#0

ISA bus

Interface

Core Logic

Slot#0

Interface

Slot#1

Interface

RF5C296/RF5C396

VCC_SLOT#1

Slot#0

Slot#1

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