3819 datasheet(119/218 Pages) RENESAS

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105

2. APPLICATION

MITSUBISHI MICROCOMPUTER

3819 Group

2.4 A-D conversion

3819 Group USER’S MANUAL

2.4 A-D conversion

2.4.1 Related registers

Fig. 2.4.2 Structure of A-D conversion register

Fig. 2.4.1 Structure of AD/DA control register

AD/DA control register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

Analog input pin selection bits

AD/DA control register (ADCON) [Address:2C16]

0 0 0 0 : P70/AN0

0 0 0 1 : P71/AN1

0 0 1 0 : P72/AN2

0 0 1 1 : P73/AN3

0 1 0 0 : P74/AN4

0 1 0 1 : P75/AN5

0 1 1 0 : P76/AN6

0 1 1 1 : P77/AN7

1 0 0 0 : P50/SIN2/AN8

1 0 0 1 : P51/SOUT2/AN9

1 0 1 0 : P52/SCLK2/AN10

1 0 1 1 : P53/SRDY2/AN11

1 1 0 0 : P54/SIN3/AN12

1 1 0 1 : P55/SOUT3/AN13

1 1 1 0 : P56/SCLK3/AN14

1 1 1 1 : P57/SRDY3/AN15

b3 b2 b1 b0

0 : Conversion in progress

1 : Conversion completed

A-D conversion completion bit

Nothing is allocated for this bit. This is a write disabled bit.

When this bit is read out, the value is "0."

0 : Disable

1 : Enable

D-A output enable bit

Nothing is allocated for this bit. This is a write disabled bit.

When this bit is read out, the value is "0."

A-D conversion register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

A-D conversion register (AD) [Address:2D16]

The read-only register which A-D conversion results are stored.

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