MSC1937-01 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSC1937-01

14/16-Segment x 16-Digit Display Controller/Driver

Oki Electric Industry 

¡ Semiconductor

MSC1937-01

FUNCTIONAL DESCRIPTION

The MSB value of 8-bit serial data determines whether the input data into MSC1937-01 is control

data or display data.

Display Data

By setting MSB = "0", the display data can be entered. The address of PLA is specified by bit 5

to bit 0 following MSB.

Table 1 provides the PLA code table.

Command

Display Data

Control Data

Function

MSB

bit 7

Sets the display contents 0

bit 6

X

bit 5

25

bit 4

24

bit 3

23

bit 2

22

bit 1

21

LSB

bit 0

20

X: Don't care

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

data with the command are determined by the bit 6 to bit 0.

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.)

A decimal equivalent value of bits 0 - 3 should be set (desired digit number –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)

10/16

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