MF3257-LYCATXX
Description
Mitsubishi’s Static RAM cards provide large memory capacities on a device approximately the size of a credit card (85.6mm×54mm×3.3mm).
Key Features
- The card has a replaceable lithium battery to maintain data in memory
- When the card is not use or the supply voltage drops, the battery will automatically maintain data in memory
- (a)READ MODE To read, WE# is set high level and CE1# or CE2# is set low level and the memory address is applied at inputs A0-A21(4MB)
- Setting OE# low level executes the reading with output at data-bus
- It is available to make the following functions according to the bination of CE1# and CE2#
- When CE1# is set low level and CE2# is set high level, the card operates as an 8 bit data-bus width card
- The data can be dealt with lower data-bus(D0-D7)
- When both CE1# and CE2# are set low level, the card operates as a 16 bit data-bus width card
- At this mode LSB of address-bus (A0) is ignored
- In addition odd byte can be accessed through upper data-bus(D8-D15) when CE1# is set high level and CE2# is set low level
Applications
- SUMMARY MF3XXX-LYCATXX series is the Static RAM cards which has 8/16 bit changeable data-bus width. The card has a replaceable lithium battery to maintain data in memory. When the card is not use or the supply voltage drops, the battery will automatically maintain data in memory
