MF31M1-J8CATXX
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
- When the card is not use or the supply voltage drops, the main 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
- This mode is useful when handling only odd bytes in the 16 bit data-bus interface system (A0 is ignored)
Applications
- SUMMARY MF3XXX-J8CATXX series is the Static RAM cards which has 8/16 bit changeable data-bus width. The card has a replaceable lithium main battery to maintain data in memory and has an auxiliary battery to maintain data in memory while the main battery is replaced. When the card is not use or the supply voltage drops, the main battery will automatically maintain data in memory
