RB5C396 Ricoh Corporation, RB5C396 Datasheet - Page 25

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

4. Address Mapping
any other device, the PC card status change, such as fluctuations in the voltage of the battery for the PC card and
insertion or removal of the PC card into or from the PC card slot, as well as interrupt request signals (IREQ#)
derived from the I/O cards can be assigned to one of the ten interrupt lines for ten interrupt request signals (IRQ15,
IRQ14, IRQ12, IRQ11, IRQ10, IRQ9, IRQ7, IRQ5, IRQ4, and IRQ3).
normally input to the EXTSMI# pin of the Intel 386SL to output a low-level pulse having three times the width of the
SYSCLK pulse at the time of interrupt request generation and a high-level pulse at any other time.
occurs on GPI (General Purpose Input).
erated. In this case, the appropriate bit must be set to “1” in the Card Status Change Register (Index : 04h) in the
Explicit Write Back Acknowledge Mode to enable interrupt request recognition by the host system interrupt pro-
cessing routine. Upon interrupt request recognition, the bit is reset to “0”.
other mode than the Explicit Write Back Acknowledge Mode.
DMA mode, IRQ9, IRQ10, IRQ11 (or IRQ15) work as DACK#, DREQ, TC.
5. Bus Sizing
generated even when the window is configured for 16bit. This means that the combination of SBHE# input and SA0
input override the data size configuration. On 8bit host systems, the SBHE# input must be pulled high (inactive) for
proper operation. The following is a truth table of the card enable logic.
To prevent any conflict between interrupt request signals derived from the RF5C296 or the RF5C396 and from
These interrupt requests are programmable to the level mode or the edge trigger mode.
In addition to steering IRQn output, INTR# output is also used as an interrupt output. The INTR# pin signal is
In addition to these interrupts sources, it is programmable that IRQs will be generated when the transition
If card status change while other card status change interrupt request, second interrupt request pulse is not gen-
Incidentally, all the bits in the Card Status Change Register (Index : 04h) are reset to “0” when it is read in any
IRQ9, IRQ10, IRQ12, IRQ11 (or IRQ15) are multi-function pins. In PCMCIA-ATA mode, IRQ12 can drive LED. In
In addition to 16bit bus cycle, RF5C296/RF5C396 supports 8bit bus cycle. The 8bit bus cycle to a PC Card can be
16bit Window
YES
YES
YES
YES
NO
NO
NO
NO
SBHE#
H
H
H
H
L
L
L
L
A0
H
H
H
H
L
L
L
L
RF5C296/RF5C396L/RB5C396/RF5C396
CE2#
H
H
H
H
H
H
L
L
CE1#
H
L
L
L
L
L
L
L
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