isd1900 Winbond Electronics Corp America, isd1900 Datasheet - Page 9

• Manufacturer Part Number: isd1900
• Description: Single-chip, Multiple-message Voice Record/playback Device 10.6- To 32-seconds Duration
• Manufacturer: Winbond Electronics Corp America

6. FUNCTIONAL DESCRIPTION
There are two operational modes: address trigger (
condition is selected on
6.1. A
The start address bits (
to access the memory location and they can divide the memory into a maximum of 16 slots. As
an example of I1916, they are defined as follows:
6.1.1. Record (
• Low active input, level-hold for level-trigger or falling edge for edge-trigger with debounce required.
• For 8kHz sampling frequency, if
• For 6.4kHz sampling frequency, if
• Recording begins from the start address to end address and
• Recording ceases whenever
• Then the device will automatically power down.
• This pin has an internal pull-up device.
• Once
DDRESS
recording is activated. However, if
is initiated.
recording is activated. However, if
recording is initiated.
pulse appears while in edge-trigger mode or when end address is reached. Then an EOM marker is
written at the end of message. And
illegal.
( E3 )
S3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
REC
T
RIGGER
is active, input on
REC
( E2 )
S2
NORM
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
) Operation
(
NORM
S0
/
,
MODE
( E1 )
S1
) O
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
S1
REC
,
PERATION
, the power must be cycled to enable it.
S2
REC
FT
REC
REC
LED
returns to High in level-hold mode or a subsequent lower going
( E0 )
,
S0
REC
&
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
NORM
is held at Low for a period equal to 1 sec or more, then level
is held at Low for a period equal to 1.25 sec or more, then level
S3
is pulsed Low for less than 1 sec, then edge-trigger recording
is off.
is pulsed Low for less than 1.25 sec, then edge-trigger
) and end address bits (
Row #
/
- 9 -
104
112
120
MODE
16
24
32
40
48
56
64
72
80
88
96
0
8
NORM
,
Publication Release Date: September 11, 2007
) and direct trigger (
S0
Duration [s]
,
I1916
10.0
11.0
12.0
13.0
14.0
15.0
LED
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
0
S1
,
is on.
S2
,
E0
S3
,
E1
,
E0
,
MODE
E2
,
E1
&
ISD1916
). After a new
,
E3
E2
) are used
Revision 0
or
E3
is