isd1900 Winbond Electronics Corp America, isd1900 Datasheet - Page 13

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

6.2. D
6.1.5. XCLK Feature
• When precision sampling frequency is required, external clock mode can be activated by setting
• However, when internal clock is used,
• The external clock frequencies required for various sampling frequencies are listed in below table.
• The direct trigger is selected by the
• Once direct trigger is activated,
• The record or playback operation is pre-defined by the
• Each message can be randomly accessed via its message control pin (
to Low. Under such condition, the resistor at Rosc pin must be removed and the external clock signal
must be applied to the Rosc pin. These conditions must be satisfied prior to any operations.
allow the device to construct itself to the appropriate configuration by re-defining the function on the
related control pins. Also, the mode change is only allowed while the device is in power down state and
inhibited during an operation is in progress.
message configurations
message has approximate equal length of duration, which is related to the number of rows assigned as
in below table.
operation while setting it to High enables playback operation.
operations are facilitated accordingly. Non-configured pins are automatically disabled and must be
floated.
Notes:
Norm/Mode
IRECT
Sampling Freq [kHz]
<S3:S0>
<E3:E0>
or AnaIn
XCLK
Mic+/-
PlayE
REC
LED
SP+
SP-
[1]
T
: Number of fixed message arrangement with respect to
[MHz]
RIGGER
T
ASet
FMC3
T
0
0
0
Deb
(
MODE
[1]
T
. Pending upon the arrangement on
AHold
) O
FMC2
3.072
0
0
1
PERATION
12
FMC1
MODE
XCLK
,
T
FMC2
Deb
FMC1
must be linked to High.
T
pin. Once chosen, the supply voltage must be reset to
- 13 -
2.048
Settle1
0
1
0
&
8
FMC3
T
Settle3
Publication Release Date: September 11, 2007
R
/P
are utilized to select various (1 to 8) fixed
# of fixed messages
1.638
pin. Setting this pin to Low allows record
6.4
FMC1
FMC1
1
2
3
,
FMC2
,
FMC2
1.356
M1
5.3
~
&
[1]
M8
&
FMC3
T
EOM
) and the desired
FMC3
ISD1916
, each divided
1.024
.
4
Revision 0
XCLK