isd1000a ETC-unknow, isd1000a Datasheet - Page 6

• Manufacturer Part Number: isd1000a
• Description: Single-chip Voice Record/playback Devices 16- And 20-second Durations
• Manufacturer: ETC-unknow

-1
ISD1000A Series
A6 or A7 = LOW) and 2. ISD1000A Series Opera-
tional Mode Options (A6 AND A7 = HIGH).
Operational mode options are shown in the Oper-
ational Modes table. There are a maximum of 160
message addresses (or segments). Each seg-
ment corresponds to one of 160 rows in the ana-
log storage array. The message addresses
(segments) are in locations 0 through 159 contig-
uous. The playback/record duration of each seg-
ment depends upon the device and is as follows:
An operation may be started at any address, as
defined by address pins A0-A7. Record or play-
back continues with automatic incrementing of the
internal on-chip address until either CE is brought
HIGH (Record), an end of message marker is
encountered (Playback with CE HIGH), or an over-
flow (device full) condition results.
OPERATIONAL MODES TABLE
NOTE: An asterisk (*) indicates additional operational modes which can be used simultaneously with the given mode.
1–6
ISD1016A
ISD1020A
Control
Mode
M0
M1
M2
M3
M4
M5
Number
Part
Message cueing
Delete EOM markers
Cascading
Looping
Consecutive addressing
CE level-activated
Segment Playback/Record
Function
100 milliseconds
125 milliseconds
Duration
message
sages
Fast-forward through messages
Position EOM marker at the end of the last
Adding devices to extend message
Continuous playback from Address 0
Record/Play multiple consecutive mes-
Allow message pausing
OPERATIONAL MODES
The ISD1000A Series is designed with several
built-in operational modes provided to allow max-
imum functionality with a minimum of additional
components, described in detail below. The oper-
ational modes use the address pins on the
ISD1000A devices, but are mapped outside the
valid address range. When the two Most Signifi-
cant Bits (MSBs) are HIGH (A6 = A7=1), the
remaining address signals are interpreted as
mode bits and
operational modes and direct addressing are not
compatible and cannot be used simultaneously.
There are two important considerations for using
operational modes. First, all operations begin ini-
tially at address 0, which is the beginning of the
ISD1000A address space. Later operations can
begin at other address locations, depending on
the operational mode(s) chosen. In addition, the
address pointer is reset to 0 when the device is
changed from Record to Playback, or when a
Power-Down cycle is executed.
Second, an Operational Mode is executed when
CE goes LOW and the two MSBs are HIGH. This
Operational Mode remains in effect until the next
Typical Use
NOT
as address bits. Therefore,
Jointly Compatible*
M4, M5
M3, M4, M5
M1, M5
M0, M1, M5
M0, M1, M3, M4
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