7 an example of connections with nand flash – Toshiba H1 Series User Manual

Page 268

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TMP92CZ26A

92CZ26A-265

3.11.7 An Example of Connections with NAND Flash























Note 1: A reset sets the

NDRE

and

NDWE

pins as input ports, so pull-up resistors are needed.

Note 2: The pull-up resistor value for the NDR/B pin must be set appropriately according to the NAND Flash memory to be used and the

capacity of the board (typical: 2 K

Ω).

Note 3: The

WP

(Write Protect) pin of NAND Flash is not supported. When this function is needed, prepare it on an external circuit.

Figure 3.11.10 An Example of Connections with NAND Flash

NDCLE

NDALE

NDRE

NDWE

NDR/B

D[15:0]

CE

0

ND

CE

1

ND

TMP92CZ26A

CLE
ALE

RE

WE




R/B (open drain)

I/O[15:0]

CE WP

NAND Flash 0

CLE
ALE

RE

WE




R/B (open drain)

I/O[7:0]

CE WP

NAND Flash 1

External circuits for Write Protect

2K

Ω

100K

Ω

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