Ampro 486E P/N 5001561 Revision A, Manual

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Little Board™/486 e Technical Manual
2–54
Using SRAMs
The external battery power is combined with the internal battery using low forward voltage drop
Schottky diodes. Table 2–41 lists the SRAM and NOVRAM jumpering for S0.
Table 2–41. SRAM and NOVRAM Jumpering for S0
SRAM
Typical Devices
Pins Jumper Diagram
128K SRAM - 628128
512K SRAM - 628512 32
1
3
7
9
Non-volatile RAM
Non-volatile RAM can be used as a means of dramatically storing and retrieving runtime
application data. NOVRAM has the following specifications:
!
32 pin
!
128K bytes maximum in segments D0000 and E0000
!
Must be programmed in place on the Little Board/486 e CPU
!
NOVRAM offers some advantages over Flash EPROM including faster access speeds and
unlimited write operations.