UPD17006AGF-012-3B9 查看數據表（PDF） - NEC => Renesas Technology

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UPD17006AGF-012-3B9

4-BIT SINGLE-CHIP MICROCONTROLLER WITH PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOBILE FM, MW, AND LW RADIOS

NEC => Renesas Technology 

µPD17006AGF-011

2. KEY MATRIX CONFIGURATION

2.1 Analog Key Matrix Configuration

2.1.1 Voltage range of analog key matrix

Table 2-1 shows the voltage range of the analog key matrix.

Table 2-1 Voltage Range of Analog Key Matrix

Voltage range 1

Voltage range 2

Voltage range 3

Voltage range 4

Voltage range 5

Input Voltage Range (V)

0 to 0.9

up to 1.6

up to 2.35

up to 3.15

up to 3.85

Input A/D Value

00H-2EH

2FH-52H

53H-78H

79H-A1H

A2H-C5H

2.1.2 Example of calculating analog key resistance

Fig. 2-1 Example of Calculating Analog Key Resistance

Voltage range 1

Voltage range 2

VDD

60kΩ

20kΩ

K3–K0

Voltage range 3

20kΩ

Voltage range 4

Voltage range 5

33kΩ

67kΩ

14

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