Rainbow Electronics ISD14B20 - Manual (Page 6)

ISD14B20
Publication Release Date: October 9, 2007
- 6 - Revision 0
4. PAD DESCRIPTION
PAD NAME I / O FUNCTION
V
SSD
I Digital Ground: Ground path for digital circuits.
I S0
[1] : In Norm mode, Start Address Bit 0.
M1 : When MODE is active, l ow active operation on 1 st Message. Internal pull-up
& debounce existed.
S0 / M1
I S1
[1] : In Norm mode, Start Address Bit 1.
M2 : When MODE is active, l ow active operation on 2 nd Message. Internal pull-up
& debounce existed.
S1 / M2
I S2
[1] : In Norm mode, Start Address Bit 2.
M3 : When MODE is active, l ow active operation on 3 rd Message. Internal pull-up
& debounce existed.
S2 / M3
I S3
[1] : In Norm mode, Start Address Bit 3.
M4 : When MODE is active, l ow active operation on 4 th Message. Internal pull-up
& debounce existed.
S3 / M4
I
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, , t ogether with FMC2 & , setup
various fixed-message configurations.
FMC1 FMC3
PLAYL / FMC1
E0 / M5
I E0 [1] : In Norm mode, End Address Bit 0.
M5 : When MODE
is active, l ow active operation on 5 th Message. Internal pull-up
& debounce existed.
V
SSA
I Analog Ground: Ground path for analog circuits.
I E1
[1] : In Norm mode, End Address Bit 1.
M6 : When MODE is active, l ow active operation on 6 th Message. Internal pull-up
& debounce existed.
E1 / M6
I E2
[1] : In Norm mode, End Address Bit 2.
M7 : When MODE is active, l ow active operation on 7 th Message. Internal pull-up
& debounce existed.
E2 / M7
E3 / M8
I E3
[1] : In Norm mode, End Address Bit 3.
M8 : When MODE is active, l ow active operation on 8 th Message. Internal pull-up
& debounce existed.
V
SSP2
I Ground: Ground for negative PWM speaker driver.
SP- 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.
V
CCP
I Speaker Power Supply: Power supply for PWM speaker drivers.
SP+ O 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.
V
SSP1
I Ground: Ground for positive PWM speaker driver.
AGC I Automatic Gain Control (AGC): The AGC adjusts the gain of the microphone
preamplifier circuitry.
MIC+ / AnaIn 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.