ISD1916 Datasheet, PDF (8/25 Pages) Winbond – SINGLE-CHIP, MULTIPLE-MESSAGE VOICE RECORD/PLAYBACK DEVICE 10.6- TO 32-SECONDS DURATION

ISD1916
PIN NAME
MIC-
Rosc
V_CCA
LED
PLAYE / FMC2
PIN #
19
20
21
22
23
I/O
FUNCTION
I _{MIC- : Inverting input of the differential microphone signal. While FT is enabled,}
MIC- pin is disabled and must be floated.
I Oscillator Resistor: Connect an external resistor from this pin to V_SSA to select the
internal sampling frequency.
I Analog Power Supply: Power supply for analog circuits.
O _{LED output: During recording, this output is Low. Also, LED pulses Low}
momentarily at the end of playback.
I _{PLAYE : In Norm mode, low active input, edge-trigger playback from start to end}
addresses & toggle on-off. Debounce & internal pull-up existed.
REC / R/P
FMC2 : When MODE is active, FMC2 , together with FMC1 & FMC3 , setup
various fixed-message configurations.
24
I _{REC : In Norm mode, level-hold (after 1 sec holding) or edge-trigger (toggle on-off),}
low active, recording from start to end addresses. Debounce & internal pull-up
existed.
R/P ( When MODE is active):
• When R/P is set to Low, level-hold record operation is selected.
XCLK / FMC3
25
• When R/P is set to High, edge-trigger & toggle on-off playback operation is
selected.
I _{External Clock: In Norm mode, low active and level-hold input. As XCLK}
activated, Rosc pin accepts external clock input signal, provided resistor at Rosc
must be removed. Connecting this pin to High enables device running on internal
clock via Rosc resistor. If not used, XCLK must be at high level.
FT
26
Norm / MODE
27
When MODE is active, FMC3 , together with FMC1 & FMC2 , setup various fixed-
message configurations.
I Feed-Through : Low active input, Level-hold, debounce & Internal pull-up required.
When FT is selected, the MIC+ input is configured to a single-ended input with
1Vp-p maximum input amplitude and feed-through to the speaker outputs.
I Level-hold input.
• Norm : When set to High, the device operates under Address trigger condition.
• MODE : When set to Low, the device operates under direct trigger condition. The
device reconfigures its pin definitions to fit various fixed-message configurations
utilizing FMC1 , FMC2 & FMC3 pins as below table.
FMC3
FMC2
FMC1
# of fixed messages
0
0
0
1
0
0
1
2
0
1
0
3
0
1
1
4
1
0
0
5
1
0
1
6
1
1
0
7
1
1
1
8
V_CCD
28
I Digital Power Supply: Power supply for digital circuits.
Notes: ^[1] : Address bits S0 , S1 , S2 , S3 , E0 , E1, E2 & E3 are used to access the memory location.
Publication Release Date: September 11, 2007
-8-
Revision 0