M30620FCAFP datasheet(446/615 Pages) RENESAS

446 / 615 page

A-D Converter

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-129

Figure 2.7.18. Set-up procedure of repeat sweep 0 mode

Setting A-D conversion start flag

A-D control register 0 [Address 03D616]

ADCON0

A-D conversion start flag

1 : A-D conversion started

Transmitting conversion result to A-D register i

Eight low-order bits of A-D conversion result

(b15)

(b8)

A-D register 0

[Address 03C116, 03C016]AD0

A-D register 1

[Address 03C316, 03C216]AD1

A-D register 2

[Address 03C516, 03C416]AD2

A-D register 3

[Address 03C716, 03C616]AD3

A-D register 4

[Address 03C916, 03C816]AD4

A-D register 5

[Address 03CB16, 03CA16]AD5

A-D register 6

[Address 03CD16, 03CC16]AD6

A-D register 7

[Address 03CF16, 03CE16]AD7

During 10-bit mode

Two high-order bits of A-D conversion result

During 8-bit mode

When read, the content is indeterminate

Start A-D conversion

Setting A-D conversion start flag

A-D control register 0 [Address 03D616]

ADCON0

A-D conversion start flag

0 : A-D conversion disabled

Stop A-D conversion

Selecting Sample and hold

A-D control register 2 [Address 03D416]

ADCON2

A-D conversion method select bit

1 : With sample and hold

Setting A-D control register 0 and A-D control register 1

A-D control register 0

[Address 03D616] ADCON0

A-D sweep pin select bit (Note)

0 0 : AN0, AN1 (2 pins)

0 1 : AN0 to AN3 (4 pins)

1 0 : AN0 to AN5 (6 pins)

1 1 : AN0 to AN7 (8 pins)

b1 b0

A-D control register 1 [Address 03D716]

ADCON1

A-D operation mode select bit 1 (Note)

0 (Must always be “0” in repeat sweep mode 0)

8/10-bit mode select bit

0 : 8-bit mode

1 : 10-bit mode

Frequency select bit 1

0 : fAD/2 or fAD/4 is selected

1 : fAD is selected

Repeat sweep mode 0 is selected

(Note)

Trigger select bit

0 : Software trigger

A-D conversion start flag

0 : A-D conversion disabled

Frequency select bit 0

0 : fAD/4 is selected

1 : fAD/2 is selected

Vref connect bit

1 : Vref connected

External op-amp connection mode bit

0 0 : ANEX0 and ANEX1 are not used

b7 b6

Invalid in repeat sweep mode 0

Repeatedly carries out A-D conversion on pins

selected through the A-D sweep pin select bit.

Note: Rewrite to analog input pin select bit after changing A-D operation mode.

M30620FCAFP Datasheet(PDF) 446 Page - Renesas Technology Corp

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