FOR AUTOMOTIVE 105

°C OPERATION 3-WIRE SERIAL E

S-93C86B H Series

Seiko Instruments Inc.

13

4.2 Writing data (WRITE)

To write 16-bit data to a specified address, change CS to high and then input the WRITE instruction, address,

and 16-bit data following the start bit. The write operation starts when CS goes low. There is no need to set

the data to 1 before writing. When the clocks more than the specified number have been input, the clock pulse

monitoring circuit cancels the WRITE instruction. For details of the clock pulse monitoring circuit, refer to “

Function to Protect Against Write due to Erroneous Instruction Recognition”.

A9

D15

<1>

1

2

3

4

5

6

7

8

9

10

11

0

1

A8

A7

A6

A5

A4

A3

A2

CS

SK

DI

DO

High-Z

ready

busy

29

14

D0

High-Z

Verify

Standby

12

13

A1

A0

Figure 6 Data Write Timing

4.3 Erasing data (ERASE)

To erase 16-bit data at a specified address, set all 16 bits of the data to 1, change CS to high, and then input the

ERASE instruction and address following the start bit. There is no need to input data. The data erase

operation starts when CS goes low. When the clocks more than the specified number have been input, the

clock pulse monitoring circuit cancels the ERASE instruction. For details of the clock pulse monitoring circuit,

refer to “ Function to Protect Against Write due to Erroneous Instruction Recognition”.

SK

DI

<1>

A8

A7

A6

A5

A4

1

2

3

4

5

6

7

8

9

CS

DO

High-Z

1

1

ready

High-Z

A1

A0

12

13

busy

Verify

Standby

A3

A2

10

11

A9

Figure 7 Data Erase Timing