RB5C396 Ricoh Corporation, RB5C396 Datasheet - Page 36

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

32
Index : 1Eh
Consequently, access to indexes of 1Eh and 5Eh means access to the same register.
bit7 to bit4 : Reserved
bit3
bit2
bit1
bit0
RF5C296/RF5C396L/RB5C396/RF5C396
1.6 Global Control Register
This register is not duplicated per slot. This register can be accessed from either Slot#0 or Slot1# in RF5C396.
: IRQ14 Pulse Mode Enable. Setting this bit to “1” and bit 1 (Level Mode Interrupt Enable) to “0” will
: Explicit Write Back Card Status Change Acknowledge Bit. Setting this bit to “1” will require an explicit
: In the Level Mode, the IRQn pin signals are held at high impedance until generation of any interrupt
: Power Down Bit
Level Mode). When this bit is set to “0”, the IRQn pin signals are caused to transition from “1” to “0”
enable the RF5C296/RF5C396 to support pulse-mode IRQ14 interrupt output.
write of “1” to the Card Status Change Register Bit which indicates an interrupting condition. Default
value is “0”. When this bit is set to “0”, the card status change interrupt is acknowledged by reading the
Card Status Change Register, and the register bits are cleared upon a read.
caused by the Card Status Change Register (Index : 04h) or routed by the IRQn pin signals from the
I/O card. When this bit is set to “1”, the IRQn pin signals are caused to transition from high impedance to “0”
upon interrupt generation and reverted to high impedance upon completion of interrupt processing (in the
upon interrupt enabling and from “0” to “1” upon interrupt generation, and becomes inactive upon completion
of interrupt processing (in the Edge Mode).
If this bit is set to “1”, then setting CS# to “1” will go into the power down mode. During CS# controlled
power down, all internal registers are inaccessible, outputs are disabled, and the chip is at minimum
power consumption level. IRQn and RI_OUT# will still be active to monitor the card detect and RI#
status for resume indication.
CS#
0
1
0
1
Default value :
Power Down Control Bit
0
0
1
1
´ ´ ´ ´
0000b
Power Down Mode
Yes
No
No
No
Read &Write