ISD5216PI datasheet(39/75 Pages) WINBOND

39 / 75 page

ISD5216

Publication Release Date: Jan. 31, 2006

- 39 -

Revision B.4

INT (Interrupt)

INT is an open drain output pin. The Winbond ISD5216 Interrupt pin goes LOW and stays LOW when

an Overflow (OVF) or End of Message (EOM) marker is detected. Each operation that ends in an

EOM or OVF generates an interrupt, including the message cueing cycles. The interrupt is cleared by

a READ STATUS instruction that gives a status byte on the SDA line.

MCLK (Master Clock Input)

The Master clock input for the Winbond ISD5216 product has an internal pull-down device. Normally,

the Winbond ISD5216 ChipCorder section is operated at one of four internal rates selected for its

internal oscillator by the Sample Rate Select bits. If the internal oscillator is powered down

(configuration bit OSPD set to ONE), the device is clocked through the MCLK pin as shown in the

section ISD5216 Analog Structure (right half) description on page 32. If an external clock is not used,

this input should be connected to VSSD.

7.8.3. CODEC Iinterface Pincs

SCK

Bit clock for PCM or I2S audio data

The Word Sync (Frame Sync) signal is used to differentiate between data for left and right channel in

2S. For PCM it signals the beginning of the word.

SDIO

For PCM, this is the output signal from the CODEC, it should be connected to the input pin of the

receiving device.

In I

2S mode, this is a bi-directional pin that should be connected to the bi-directional I2S data pin on

the other device connected to the I

2S bus.

SDI

This pin is only used when the CODEC is in PCM mode, this signal provides digital audio input to the

CODEC it should be connected to the output pin of the transmitting device.

7.8.4. ANALOG I/O PINS

MIC+, MIC-

(Microphone Input +/-)

The microphone inputs transfer the voice signal to the on-chip AGC preamplifier, or directly to the

CODEC INPUT MUX, depending on the selected path. The AGC circuit has a range of 45 dB in order

to deliver a nominal 694 mV p-p into the storage array from a typical electret microphone output of 2 to

20 mV p-p. The input impedance is typically 20 kΩ differential and 13.3 kΩ differential when the

CODEC INPUT MUX MICIN path is selected.

The MICBS pin provides a 2.2V bias voltage for the external microphone only when the AGC is

powered up. Using this regulated bias voltage results in less supply noise coupling into the MIC+ and

ISD5216PI 数据表(PDF) 39 Page - Winbond

ISD5216PI 数据表(HTML) 39 Page - Winbond

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

数据表下载