Datasheet

Hardw are

2.1.5 4-Mb Serial Flash Memory

The Audio PICtail

Plus Daughter Board includes 4-Mb serial Flash memory that can be

used for storing data. The memory interfaces with the SPI bus on dsPIC33F and

PIC24H devices and might typically be used by applications that require storage of

speech samples for playback purposes.

2.2 HARDWARE COMPONENTS

Figure 2-3 identifies the key Audio PICtail

Plus Daughter Board hardware components.

FIGURE 2-3: AUDIO PICtail

™

PLUS DAUGHTER BOARD

2 3

1112131415161718

Ref Component Ref Component

1 Flash Memory Write-Protect Jumper (J6) 12 Microphone Gain Control (R29)

2 Flash Memory (U1) 13 Line/Microphone Input Select Jumper (J8)

3 ADC Channel Select Jumper (J5) 14 Headphone Output Jack (J10)

4 Line/Microphone Input Phone Jack (J1) 15 Line Output Jack (J9)

5 Output Select Jumper (J4) 16 Headphone Amplifier Digital Volume Control (S2)

6 PWM Low-Pass Filter (U3:A,B) 17 Headphone Amplifier Digital Volume Control (S1)

7 DAC Differential Amplifier (U3:C) 18 Headphone Amplifier (U5)

8 28-Pin Starter Development Board Connector (J3) 19 Codec Oscillator (Y1)

9 Line Output Amplifier (U4:B) 20 Explorer 16 PICtail Connector (J2)

10 Filter Input Select Jumper (J7) 21 Codec (U2)

11 Line Output Gain Control Potentiometer (R24) 22 Anti-Aliasing Low-Pass Filter (U4:C)