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MSC1951-01RS

7-Segment x 16-Digit or 16-Segment x 6-Bargraph display Controller/Driver

Oki Electric Industry 

¡ Semiconductor

MSC1951-01

FUNCTIONAL DESCRIPTION

The MSB value of 8-bit serial data determines whether the input data into MSC1951-01 is control

data or display data.

Display Data

By setting MSB = "0", the display data can be entered. The address of PLA and set values are

specified by bit 5 to bit 0 following MSB.

Tables 1 to 3 provide the PLA code table.

Command

Display Data

Description

Set Display contents

MSB

LSB

bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

0 X 25 24 23 22 21 20

X: Don't care

Control Data

The control data can be input by setting MSB to "1". In addition, a command type and set values

are determined by the bit 6 to bit 0 following MSB.

Command

Function

Buffer Pointer Control

Digit Counter Control

Duty Cycle Control

Test Mode

Specifies the RAM

address.

Sets the number of

display digits.

Sets the duty value.

Sets the test mode.

MSB

LSB

bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0

1

0

1

0

23

22

21

20

1

1

0

0

23

22

21

20

1

1

1

24

23

22

21

20

1

0

0

24

X

X

X

X

X: Don't care

a) Buffer Pointer Control

This command changes the display contents only at an arbitrary digit. (The RAM write

address is set.)

To input data into bits 0 to 3, set (desired digit –2).

(Example) When specifying AD4, the set value is 2 (0010).

Specified Digit

AD1

AD2

AD3

AD4

AD5

AD6

AD7

AD8

Set Value of

Bits 0 to 3

15 (1111)

0 (0000)

1 (0001)

2 (0010)

3 (0011)

4 (0100)

5 (0101)

6 (0110)

Specified Digit

AD9

AD10

AD11

AD12

AD13

AD14

AD15

AD16

Set Value of

Bits 0 to 3

7 (0111)

8 (1000)

9 (1001)

10 (1010)

11 (1011)

12 (1100)

13 (1101)

14 (1110)

10/17

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