Data Sheet

Rev. 3

7

AS2578 /B

March 1997

LM Codes and Pin Options

LM code

Pinoption

Function

02-2*

AP = L

Automatic pause insertion: off

Sliding cursor: off

MF select 1

02-3

AP = Hi-Z

Automatic pause insertion: on

Sliding cursor: off

MF select 1

-

AP = H

Automatic pause insertion: off

Sliding cursor: on

MF select 2

033*

MODE = L

LD mode 40/60

GL

033*

MODE = H

LD mode 33/66

GL

036

-

MF mode

GL

037

-

MF mode

Flash

-

MODE = Hi-Z

MF mode

GL + Flash

250

-

Resets all user settings to default and clears all RAM contents

258

-

Clears all RAM contents

5 - 4*

MV = Hi-Z

Melody volume:

0 dB

5 - 3

MV = R3

Melody volume:

- 5.5 dB

5 - 2

MV = R2

Melody volume:

- 11.5 dB

5 -1

MV = R1

Melody volume:

- 17.5 dB

6 - 1

RR = Hi-Z

Repetition rate:

1 time

(50 ms pause)

6 - 2*

RR = C1

Repetition rate:

4 times

6 - 3

RR = C2

Repetition rate:

7 times

6 - 4

RR = C3

Repetition rate:

10 times

Note 1: Programming an LM code overwrites pin options, however, LM code 033 can only be selected when the MODE

pin is connected to either high or low for selecting the make/break ratio. Not valid LM codes are ignored. LM

codes with a '*' are default settings.

Note 2: When the AP pin is pulled low during execution of a pause, the pause will be terminated.

Note 3: AP pin option not available on AS2578B.