Isd14b20 – Rainbow Electronics ISD14B20 User Manual

Page 4

ISD14B20

Publication Release Date: October 9, 2007

- 4 -

Revision 0

2.1. Address trigger operational mode

• While in

mode, flexible message duration is defined by start address and end

address.

NORM

• Utilize four start addresses (

) and four end addresses (

) to

specific the message duration.

S0 S1 S2

E0 E1 E2

•

REC

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

•

PLAYE

: Edge-trigger playback from start to end addresses and stops at EOM marker, if EOM

is prior to end address. Toggle on-off.

•

PLAYL

: Level-hold playback from start to end addresses. Also, if constantly Low, device will

loop playback from start to end addresses.

2.2. Direct trigger operational mode

• While

MODE

is active, utilizing,

FMC1

FMC3

, the device reconfigures some pins to

adapt various (1 to 8) fixed equal message configurations for random access and pre-defines
the fixed message duration accordingly.

FMC2

• The control pins are:

(message activation) and

(record or playback selection).

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

pin.

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

) and the

desired operation is facilitated accordingly.