Aaeon PCM-7890, User Manual

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Chapter 2 Installation 43
DiskOnChip socket (U21)
The DiskOnChip 2000 family of products provides a single chip
solid-state flash disk in a standard 32-pin DIP package. The
DiskOnChip 2000 is a solid-state disk with no moving parts,
resulting in a significant reduction in power consumption and an
increase in reliability. The DiskOnChip is a small plug and play
Flash disk. It is easy to use. And it saves integration overhead.
The DiskOnChip 2000 family of products is available in capacities
ranging from 2MB up to 144MB, unformatted. In order to manage
the disk, the DiskOnChip 2000 includes the TrueFFS, M-Systems
Flash File System proprietary software. The DiskOnChip 2000
package is pin-to-pin compatible with a standard 32-pin EPROM
device.
Note 1: Pins A13 through A16 are not
used by the MD2200. They are kept for
socket backward compatibility with ED
1100 (DiskOnChip 1000)
Note 2: Pins 1 and 30 are not used by
MD2200
pin
Name
Descr iption Pin N umber Dir ection Note
A0-A12 Addr ess bus 4- 12,23,25-27 Inputs
A13-A16 Addr ess bus 2,3,28,29 Inputs 1
D0- D7 Data bus 13- 15,17-21 I/O
CE/ C hip Enable 22 Input
OE/ Output Enable 24 Input
WE/ Wr ite Enable 31 Input
NC Not connected 1.30 2
VCC Pow er 32
GND Ground 16
OE /