Ampro Corporation 486E manual Using SRAMs, Non-volatile RAM

Little Board™/486e Technical Manual

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	Pins	Jumper Diagram
Typical Devices
128K SRAM - 628128	32	1	3
512K SRAM - 628512
		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/486e CPU

!NOVRAM offers some advantages over Flash EPROM including faster access speeds and unlimited write operations.

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