SM3322ARA

SEIKO NPC CORPORATION - 9

Gain Setting (register write mode, OE = LOW or open-circuit)

If OE is LOW or open circuit, serial interface operation starts when SE goes HIGH.

Write data comprises 1 read/write mode bit (write mode = 0), 3 address bits, and 12 write data bits transferred in sequence. If the address

data bits match the address control pin settings (meaning the device is addressed), the write data is loaded into the register, and the write

data becomes valid and serial interface operation ends when SE goes LOW. Note that data will be corrupted if there are less than or more

than 16 clock pulses received during serial data transfer.

Register write (when OE is LOW)

Register write (when OE is open-circuit)

Analog Output Control (register write mode, OE = HIGH)

If OE is HIGH, serial interface operation starts when SE goes HIGH.

Write data comprises 1 read/write mode bit (write mode = 0), 3 address bits, and 4 dummy data bits transferred in sequence. The address

data becomes valid and serial interface operation ends when SE goes LOW. If the address data bits match the address control pin settings

(meaning the device is addressed), the output is enabled. If the output was already enabled and the address data does not match the address

pin settings, the output is disabled. Note that if there are less than or more than 8 clock pulses received during serial data transfer, an address

mismatch occurs and the output is disabled.

In addition, sequential write cycles to the register are permitted while OE is HIGH.

Register write (when OE is HIGH)

OE

SE

DATA

CLK

A2

A1

A0

R/W

-

CS1

CS0

TS1

TS0

GS3

GS2

GS1

GS0

1234

5

6

7

8

9

10

11

12

13

14

15

16

"L"

-

-

-

OE

SE

DATA

CLK

OUT

A2

A1

A0

R/W

-

CS1

CS0

TS1

TS0

GS3

GS2

GS1

GS0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

"L"

(OPEN)

(Hi-Z)

-

-

-

OE

SE

DATA

CLK

OUT

A2

A1

A0

R/W

-

1234

5

6

78

(Hi-Z)

-

-

-