34825 datasheet(33/39 Pages) FREESCALE

33 / 39 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

34825

TYPICAL APPLICATIONS

APPLICATION INFORMATION

TYPICAL APPLICATIONS

APPLICATION INFORMATION

ID RESISTANCE VALUE ASSIGNMENT

The ID resistors used with the 34825 are standard 1%

resistors. Table 21 lists the complete 32 ID resistor

assignment. The ones with the Assigned Functions filled are

the ones that are already used with special functions. The

ones reserved can be assigned to other functions.

Table 21. ID Resistance Assignment (Unit: k

Ω)

Item#

ADC Result

ID Resistance

Assignment

00000

<1.9

Reserved

00001

2.0

00010

2.604

00011

3.208

00100

4.014

00101

4.820

00110

6.03

00111

8.03

01000

10.03

01001

12.03

01010

14.46

01011

17.26

S10

01100

20.5

S11

01101

24.07

S12

01110

28.7

UART Test Cable 1

01111

34.0

UART Test Cable 2

10000

40.2

USB Test Cable 1

10001

49.9

USB Test Cable 2

10010

64.9

Reserved

10011

80.6

Reserved

10100

102

Reserved

10101

121

Reserved

10110

150

Reserved

10111

200

Carkit Charger

Type 1

11000

255

Reserved

11001

301

Reserved

11010

365

Reserved

11011

442

Carkit Charger

Type 2

11100

523

Reserved

11101

619

R/C Accessory 1

11110

1000

R/C Accessory 2

11111

ID float

The remote control architecture is illustrated in Figure 26.

The recommended resistors for the remote control resistor

network are given in Table 22.

Table 22. Remote Control Resistor Values (Unit: k

Ω)

Resistor

Standard Value

ID Resistance

2.0

0.604

2.604

0.604

3.208

0.806

4.014

0.806

4.82

1.21

6.03

2.0

8.03

2.0

10.03

2.0

12.03

R10

2.43

14.46

R11

2.8

17.26

R12

3.24

20.5

R13

3.57

24.07

R14

590/976

614/1000

…...

R13

R14

HOLD

GND

S12

Figure 26. Remote Control Architecture

DECOUPLING CAPACITOR

Decoupling capacitors are required at all power supply

input and output pins. For the VDD pin, a X5R capacitor of

1.0 μF is recommended. For VBUS pin, because it also acts

as the microphone input, the decoupling capacitance at

VBUS pin must be carefully considered. Assuming the voice

band is 3.4 kHz and the pull-up resistance for the microphone

is 2k

Ω, the decoupling capacitance at the VBUS pin should

Table 21. ID Resistance Assignment (Unit: k

Ω)

Item#

ADC Result

ID Resistance

Assignment

34825 Datasheet(PDF) 33 Page - Freescale Semiconductor, Inc

34825 Datasheet(HTML) 33 Page - Freescale Semiconductor, Inc

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

Datasheet Download

Link URL