BR9020F 데이터 시트보기 (PDF) - ROHM Semiconductor

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BR9020F

1, 2, and 4k bit EEPROMs for direct connection to serial ports

ROHM Semiconductor 

Memory ICs

•Input / output circuits

(1) Input circuits

RESET int.

CS

CS int.

DI

(2) Output circuits

BR9010 / BR9010F / BR9010FV / BR9020 / BR9020F /

BR9040 / BR9040F

CS int.

SK

WC

OE int.

DO

∗ DO: BR9010 / F / FV

BR9020 / F

OE int.

DO

∗ DO: BR9040 / F

R/B

R / B: BR9020 / F, BR9040 / F

•Circuit operation

(1) Command mode

Command

Read

(READ)

Write

(WRITE)

Erase / Write enabled (EWEN)

Erase / Write disable (EWDS)

∗ Either VIH or VIL

With BR9020 / F,

With BR9010 / F / FV,

ଝ1 is ‘0’

ଝ1 and 2 are ‘0’

Start bit

1010

1010

1010

1010

Operating code

1000

0100

0011

0000

Address

A0 A1 A2 A3 A4 A5 (A6) ଝ2 (A7) ଝ1

A0 A1 A2 A3 A4 A5 (A6) ଝ2 (A7) ଝ1

∗∗∗∗∗∗∗ ∗

∗∗∗∗∗∗∗ ∗

Data

D0 D1—D14 D15

10

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