ISD5008 datasheet(28/47 Pages) ETC

Part #	ISD5008

Description	SINGLE CHIP VOICE RECORD PLAYBACK DEVICE 4-, 5-, 6-, AND 8- MINUTE DURATIONS

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ISD5008 Product

25

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and playback. These are bits D2 and D3 of

CFG1. To enable the 8.0 kHz sample rate,

D2 and D3 must be set to ZERO.

4.

Select the LOW PASS FILTER input (only) to

the S2 SUMMING amplifier —Bits S2M0 and

S2M1 control the state of the SUM2 SUM-

MING amplifier. These are bits D5 and D6

respectively of CFG1 and they should be

set to the state where D5 is ZERO and D6 is

ONE to select the LOW PASS FILTER (only)

path.

5.

Select the SUM2 SUMMING amplifier

path through the VOLUME MUX—Bits

VLS0 and VLS1 control the state VOLUME

MUX. These bits are bits D14 and D15, re-

spectively of CFG1. They should be set to

the state where D14 is ONE and D15 is ZERO

to select the SUM2 SUMMING amplifier.

6.

Power up the VOLUME CONTROL LEVEL—

Bit VLPD controls the power-up state of the

VOLUME CONTROL attenuator. This is Bit D0

of CFG0. This bit must be set to a ZERO to

power-up the VOLUME CONTROL.

7.

Select a VOLUME CONTROL LEVEL—Bits

VOL0, VOL1, and VOL2 control the state of

the VOLUME CONTROL LEVEL. These are bits

D11, D12, and D13, respectively, of CFG1.

A binary count of 000 through 111 controls

the

amount

of

attenuation

through

that

state. In most cases, the software will select

an attenuation level according to the de-

sires of the current users of the product. In

this example, we will assume the user wants

an attenuation of –12 dB. For that setting,

D11 should be set to ONE, D12 should be

set to ONE, and D13 should be set to a ZE-

RO.

8.

Select the VOLUME CONTROL path

through the OUTPUT MUX—These are bits

D3

and

D4,

respectively,

of

CFG0.

They

should be set to the state where D3 is ZERO

and D4 is a ZERO to select the VOLUME

CONTROL.

9.

Power up the SPEAKER amplifier and se-

lect the HIGH GAIN mode—Bits OPA0

and OPA1 control the state of the speaker

(SP+ and SP–) and AUX OUT outputs. These

are bits D1 and D2 of CFG0. They must be

set to the state where D1 is ONE and D2 is

ZERO to power-up the speaker outputs in

the HIGH GAIN mode and to power-down

the AUX OUT.

To set up the chip for Memo or Call Playback, the

configuration registers are set up as follows:

CFG0=0010 0100 0010 0010 (hex 2422).

CFG1=0101 1001 1101 0001 (hex 59D1).

Only those portions necessary for this mode are

powered up.

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ISD5008 Datasheet(PDF) 28 Page - List of Unclassifed Manufacturers

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