AmMC0XXA

5

PREL I M I N AR Y

BLOCK DIAGRAM

*

Decoder used on 8 Mbyte card only. Not used on 2 and 4 Mbyte cards.

** 2 Mbyte card: Two Am29F080B devices, S0 and S1

4 Mbyte card: Two Am29F017B devices, S0 and S1

8 Mbyte card: Four Am29F017B devices, S0...S3

*** A0–A19 on 2 Mbyte card; A0–A20 on 4 and 8 Mbyte cards.

Note: On the 2 Mbyte card, A20–A24 are not connected. On the 4 Mbyte cards, A21–A24 are not connected. On the 8 Mbyte

cards, A22-A24 are not connected. Connections not shown in this diagram are not connected internally.

OE#

BUSY#

RY/BY#

A0–A24

Decoder*

CEL#

100K

100K

CEH#

WE#

WE# to all Flash devices

Write Protect

Switch

CEL0#

CEH0#

CEL1#

CEH1#

A21

V

CC

10K

V

CC

V

CC

OE# to all Flash devices

D0–D7

D8–D15

RESET#

RESET# to all Flash devices

A0-A20***

WE#

OE#

D8-D15

V

SS

V

CC

RESET# RY/BY#

S1**

A0-A20***

CE#

WE#

OE#

D0-D7

V

SS

V

CC

RESET# RY/BY#

S2**

A0-A20***

CE#

WE#

OE#

D8-D15

V

SS

V

CC

RESET# RY/BY#

S3**

A0-A20***

CE#

WE#

OE#

D0-D7

V

SS

V

CC

RESET# RY/BY#

S0**

V

CC

10K

V

CC

10K

20975D-2