參數(shù)資料
型號(hào)： RB5C396
廠商： RICOH COMPANY LTD
元件分類(lèi)： 總線控制器
英文描述： PC Card Controller compliant with PCMCIA 2.1/JEIDA 4.2
中文描述： PCMCIA BUS CONTROLLER, PBGA256
封裝： 23 X 23 MM, PLASTIC, BGA-256
文件頁(yè)數(shù)： 71/93頁(yè)
文件大?。?/td> 449K
代理商： RB5C396
RF5C296/RF5C396L/RB5C396/RF5C396
67
The STSCHG#/RI# pin functions as an input pin for the Card Status Change# and Ring Indicate# signals when
the PC card is the I/O card (bit5 is set to “1” in the Interrupt and General Control Register (Index : 03h)).
The internal registers described below also function as those relating to the STSCHG#/RI# pin status on the con-
dition that the PC card is the I/O card.
· Interface Status Register (Index : 01h) : bit0 (Battery Voltage Detect 1 Bit)
This bit can be used to specify reading back the STSCHG#/RI# pin.
· Card Status Change Register (Index : 04h) : bit0
This bit will be set to “1” upon transition of the Card Status Change# and RI# signals to “0” when bit7
(Ring Indicate Enable Bit) is set to “0” in the Interrupt and General Control Register (Index : 03h).
· Interrupt and General Control Register (Index : 03h) : bit7 (Ring Indicate Enable Bit)
This bit can be set to “1” to specify output of the RING INDICATE# signal to the RI_OUT# pin.
· Interface Status Register (Index : 01h) : bit1 ( for the BVD2 pin) and bit0 (for the BVD1 pin)
These bits can be used to specify reading back the BVD1 and BVD2 pins.
· Card Status Change Register (Index : 04h) : bits1 and 0
Bit1 will be se to “1” upon detection of the battery warning condition, respectively.
Bit0 will be set to “0” upon detection of the battery dead condition, respectively.
· Card Status Interrupt Configuration Register (Index : 05h) : bit1 and bit0
Bit1 can be set to “1” to specify generation of interrupts upon detection of the battery warning conditions,
respectively.
Bit0 can be set to “1” to specify generation of interrupts upon detection of the battery dead conditions, respec-
tively.
The BVD1 and BVD2 pins function as input pins for battery voltage detection when the PC card is the memory
card (bit5 is set to “0” in the Interrupt and General Control Register (Index : 03h)). Based on output signals from
the PC card, the BVD1 and BVD2 pin signals are defined as shown in the table below :
BVD1
0
0
1
1
BVD2
0
1
0
1
Battery voltage conditions
Faulty battery voltage conditions requiring battery replacement and not guar-
anteeing data retention.
Faulty battery voltage conditions requiring battery replacement and not guar-
anteeing data retention.
Faulty battery voltage conditions requiring battery replacement but guaran-
teeing data retention.
Normal battery voltage conditions.
5.2 BVD1 and BVD2 Pins
5.3 STSCHG#/RI# Pin
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