BR93LL46FV 데이터 시트보기 (PDF) - ROHM Semiconductor

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BR93LL46FV

1,024-Bit Serial Electrically Erasable PROM

ROHM Semiconductor 

Memory ICs

•Operation notes

(1) Cancelling modes

〈READ〉

BR93LL46F / BR93LL46FV

Start bit

1bit

Operating code

2bits

Address

6bits

Data

16bits

〈WRITE〉

Cancel can be performed for the entire read mode space

Cancellation method: CS LOW

Start bit

1bit

Operating code

2bits

Address

6bits

a

Data

16bits

tE / W

b

a: Canceled by setting CS LOW or VCC OFF (ଝ)

b: Cannot be canceled by any method. If VCC is set to

OFF during this time, the data in the designated

address is not secured.

ଝ: VCC OFF (VCC is turned off after CS is set to LOW)

(2) Timing in the standby mode

As shown in Figure a, during standby, if CS rises when

SK is HIGH, the DI state may be read on the rising

edge. If this happens, and DI is HIGH, this is taken to

Point a: Start bit position when error occurs

Point b: Actual start bit position

be the start bit, causing a bit error (see point “a” in

Figure a).

Make sure all inputs are LOW during standby or when

turning the power supply on or off (see Figure b).

SK

SK

CS

CS

DI

0

1

a

b

(Figure a. Erroneous operation timing)

DI

0

1

b

(Figure b. Normal operation timing)

7

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