ISD1900 datasheet(8/29 Pages) ETC2

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ISD1900

Publication Release Date: Jan 5, 2009

Revision 0.51

PIN DESCRIPTION

PIN NAME

PIN #

I / O

FUNCTION

VSSD

Digital Ground: Ground path for digital circuits.

[1] : In Address Mode, Start Address Bit 0.

S0/M1

¯¯

¯¯ : When Direct Mode is active, low active operation on 1

st Message.

Internal pull-up & debounce existed.

[1] : In Address Mode, Start Address Bit 1.

S1/M2

¯¯

¯¯ : When Direct Mode is active, low active operation on 2

nd Message.

Internal pull-up & debounce existed.

[1] : In Address Mode, Start Address Bit 2.

S2/M3

¯¯

¯¯ : When Direct Mode is active, low active operation on 3

rd Message.

Internal pull-up & debounce existed.

[1] : In Address Mode, Start Address Bit 3.

S3/M4

¯¯

¯¯ : When Direct Mode is active, low active operation on 4

th Message.

Internal pull-up & debounce existed.

PlayL

¯¯¯¯¯: In Address 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.

PlayL

¯¯¯¯¯/FMC1

FMC1: When Direct Mode is active, FMC1, together with FMC2 & FMC3,

setup various fixed-message configurations.

[1] : In Address Mode, End Address Bit 0.

E0/M5

¯¯

¯¯ : When Direct Mode is active, low active operation on 5

th Message.

Internal pull-up & debounce existed.

VSSA

Analog Ground: Ground path for analog circuits.

[1] : In Address Mode, End Address Bit 1.

E1/M6

¯¯

¯¯ : When Direct Mode is active, low active operation on 6

th Message.

Internal pull-up & debounce existed.

[1] : In Address Mode, End Address Bit 2.

E2/M7

¯¯

¯¯ : When Direct Mode is active, low active operation on 7

th Message.

Internal pull-up & debounce existed.

[1] : In Address Mode, End Address Bit 3.

E3/M8

¯¯

¯¯ : When Direct Mode is active, low active operation on 8

th Message.

Internal pull-up & debounce existed.

VSSP2

Ground: Ground for negative PWM speaker driver.

SP-

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.

VCCP

Speaker Power Supply: Power supply for PWM speaker drivers.

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