ISD1900

Publication Release Date: Jan 5, 2009

Revision 0.51

4

• While in Address Mode, flexible message duration is defined by start address and end address.

• Utilize four start address pins (S0, S1, S2 & S3) and four end address pins (E0, E1, E2 & E3) to specify

the message duration.

• REC

¯¯¯¯: Level-hold or Edge-trigger (toggle on-off) recording from start to end addresses.

• PlayE

¯¯¯¯¯: Edge-trigger playback from start to end address and stops at EOM marker, if EOM is prior to

end address. Toggle on-off.

• PlayL

¯¯¯¯¯: Level-hold playback from start to end address.

Also, if constantly Low, device will loop

playback from start to end address.

2.2.

13

• While Direct Mode is active, utilizing the configuration pins, FMC1, FMC2 & FMC3, to define up to eight

similar duration messages for random access.

• The control pins are: M1

¯¯ ~ M8

¯¯ (message activation) and R

¯¯/P (record or playback selection).

• The record or playback operation is pre-defined by the R

¯¯/P pin.

• Each message can be randomly accessed via its message control pin (M1

¯¯ ~ M8

¯¯ ) and the desired

operation is facilitated accordingly.