ISD1916
5. PIN DESCRIPTION
PIN NAME
PIN #
I / O
FUNCTION
Digital Ground: Ground path for digital circuits.
S0 [1] : In Norm mode, Start Address Bit 0.
VSSD
S0 / M1
1
2
I
I
M1: When MODE is active, low active operation on 1st Message. Internal pull-up
& debounce existed.
S1 [1] : In Norm mode, Start Address Bit 1.
3
4
5
6
I
I
I
I
S1 / M2
M2 : When MODE is active, low active operation on 2nd Message. Internal pull-up
& debounce existed.
S2 [1] : In Norm mode, Start Address Bit 2.
S2 / M3
M3 : When MODE is active, low active operation on 3rd Message. Internal pull-up
& debounce existed.
S3 [1] : In Norm mode, Start Address Bit 3.
S3 /M4
M4 : When MODE is active, low active operation on 4th Message. Internal pull-up
& debounce existed.
PLAYL /FMC1
PLAYL : In Norm mode, low active input, Level-hold playback start to end
addresses, debounce & internal pull-up existed. Holding PLAYL Low constantly will
perform looping playback function from start to end addresses with insignificant
dead time between messages regardless of sampling frequencies.
FMC1 : When MODE is active, FMC1 , together with FMC2
& FMC3 , setup
various fixed-message configurations.
E0 [1] : In Norm mode, End Address Bit 0.
7
I
E0 / M5
M5 : When MODE is active, low active operation on 5th Message. Internal pull-up
& debounce existed.
VSSA
E1/ M6
8
9
I
I
Analog Ground: Ground path for analog circuits.
E1[1] : In Norm mode, End Address Bit 1.
M6 : When MODE is active, low active operation on 6th Message. Internal pull-up
& debounce existed.
E2 [1] : In Norm mode, End Address Bit 2.
10
11
I
I
E2 / M7
E3 /M8
M7 : When MODE is active, low active operation on 7th Message. Internal pull-up
& debounce existed.
E3 [1] : In Norm mode, End Address Bit 3.
M8 : When MODE is active, low active operation on 8th Message. Internal pull-up
& debounce existed.
VSSP2
SP-
12
13
I
Ground: Ground for negative PWM speaker driver.
O
SP-: Negative signal of the differential Class-D PWM speaker outputs. This output,
together with the SP+, is used to drive an 8Ω speaker directly.
Speaker Power Supply: Power supply for PWM speaker drivers.
SP+: Positive signal of the differential Class-D PWM speaker outputs. This output,
together with the SP-, is used to drive an 8Ω speaker directly.
Ground: Ground for positive PWM speaker driver.
VCCP
SP+
14
15
I
O
VSSP1
AGC
16
17
I
I
Automatic Gain Control (AGC): The AGC adjusts the gain of the microphone
preamplifier circuitry.
MIC+ / AnaIn
18
I
•
•
MIC+ : Non-inverting input of the differential microphone signal.
AnaIn : 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.
Publication Release Date: September 11, 2007
- 7 -
Revision 0