FOR AUTOMOTIVE 105

°C OPERATION 3-WIRE SERIAL E

S-93C76A H Series

Seiko Instruments Inc.

12

2. 3 Writing to chip (WRAL)

This instruction is used to write the same 16-bit data to the entire address space of the memory.

After making CS “H”, input a start bit, the WRAL instruction, an address, and 16-bit data. Any address may be

input. If data of more than 16 bits is input, the written data is sequentially shifted at each clock, and the 16-bit

data input last is the valid data. The write operation is started when CS is made “L”. It is not necessary to

set the data to “1” before it is written.

DO

<1>

2

3

4

5

6

7

8

9

10

11

12

13

14

29

0

0

0

1

D15

D0

DI

SK

CS

High-Z

busy

ready

Standby

High-Z

Verify

1

8Xs

Figure 9 Chip Write Timing

2. 4 Erasing chip (ERAL)

This instruction is used to erase the data of the entire address space of the memory.

All the data is “1”. After making CS “H”, input a start bit, the ERAL instruction, and an address. Any address

may be input. It is not necessary to input data. The chip erase operation is started when CS is made “L”.

DO

<1>

2

3

4

5

6

7

8

9

10

11

12

13

0

0

1

0

DI

SK

CS

High-Z

busy

ready

Standby

High-Z

Verify

1

8Xs

Figure 10 Chip Erase Timing