4

µPD16331

PIN DESCRIPTION

Pin Symbol

Pin Name

Pin No.

Description

PC

Inverted polarity input

27

PC = H: Polarity of all outputs inverted

BLK

Blanking input

37

BLK = H: All outputs = H or L

STB

Latch strobe input

36

L: Through

H: Data retained

ANote

RIGHT data input

30

When R/L = H, A: Input B: Output

BNote

LEFT data input

35

When R/L = L, A: Output B: Input

CLK

Clock input

31

Shift executed on rise

CLR

Clear input

32

L: All shift registers set to “L”

R/L

Shift control input

25

H: Right shift mode

A

→ O1 . . . O40 → B

L: Left shift mode

B

→ O40 . . . O1 → A

O1 to O40

High breakdown voltage output

1 to 20, 45 to 64

100 V, 150 mA MAX.

VDD1

Logic block power supply

26, 39

5 V

± 10 %

VDD2

Driver block power supply

21, 44, 65, 66, 79, 80

30 to 90 V

VSS1

Logic ground

24, 41,

Connected to system GND

VSS2

Driver ground

22, 23, 42, 43, 67 to 78

Connected to system GND

NC

Non-connection pins

28, 29, 33, 34, 38, 40

Non-connection

Note

Data which is input to the shift registers is always inverted input data A (B) and data in the shift registers is

always inverted when it is output. (Refer to the truth tables and timing chart.)

TRUTH TABLE 1 (Shift Register Block)

Input

Output

Shift Register

R/L

CLK

A

B

H

↑

Input

OutputNotes 1

Right shift executed

H

H or L

Output

Retained

L

↑

OutputNotes 2

Input

Left shift executed

L

H or L

Output

Retained

Notes 1. The data of internal shift register S39 is shifted to S40 on a rise of CLK and inverted data of S40 is output from

B. (Refer to the timing chart.)

2. The data of internal shift register S2 is shifted to S1 on a rise of CLK and inverted data of S1 is output from

A. (Refer to the timing chart.)

TRUTH TABLE 2 (Latch Block)

STB

Operation

H

Retains data immediately before STB becomes H.

L

Outputs data of shift register.

TRUTH TABLE 3 (Driver Block)

Input

State of Driver Output

A (B)

STB

BLK

PC

××

H

H

L (all driver outputs: L)

××

H

L

H (all driver outputs: H)

LL

L

H

H

LL

LL

L

HL

LH

L

HL

L

L

H

×

H

L

H

Outputs data of Sn on STB rise.

×

H

L

L

Inverts and outputs data of Sn on STB rise.

×: H or L, H: High level L: Low level