6V7 datasheet(151/298 Pages) RENESAS

151 / 298 page

Rev.1.00

May 18, 2004

page 151 of 296

M306V7MG/MH/MJ/MJA-XXXFP, M306V7FG/FH/FJ/FJAFP

Figure 2.12.6 A-D control register 0 in one-shot mode

Figure 2.12.7 A-D control register 1 in one-shot mode

A-D control register 0 (Note 1)

Symbol

Address

When reset

ADCON0

03D616

00000???2

Analog input pin select

bit

Bit symbol

Bit name

Function

CH1

CH2

A-D operation mode

select bit 0

MD0

MD1

ADST

A-D conversion start flag

0 : A-D conversion disabled

1 : A-D conversion started

Frequency select bit 0

0: fAD/4 is selected

1: fAD/2 is selected

CKS0

0 0 0 : Do not set

0 0 1 : Do not set

0 1 0 : AN 0 is selected

0 1 1 : AN 1 is selected

1 0 0 : AN 2 is selected

1 0 1 : AN 3 is selected

1 1 0 : AN 4 is selected

1 1 1 : AN 5 is selected

b2 b1 b0

0 0 : One-shot mode

b4 b3

CH0

Notes 1: If the A-D control register is rewritten during A-D conversion, the conversion

result is indeterminate.

2: When changing A-D operation mode, it is necessary to set analog input pins

3: When

selecting fAD/1, always be sure to set this bit to “1”. Also , if f(Xin) exceeds

10 MHz, lower the

φA-D frequency to 10 MHz or below by dividing it.

again.

Reserved bit

Must always be set to “0”

(Note 2)

(Note 3)

(Note 2)

A-D control register 1 (Note 1)

Symbol

Address

When reset

ADCON1

03D716

0016

Bit name

Function

Bit symbol

A-D sweep pin

select bit

SCAN0

SCAN1

MD2

Reserved bit

Must always be set to “0”

VCUT

Reserved bits

Vref connect bit

A-D operation mode

select bit 1

0 : Any mode other than repeat sweep

mode 1

1 : Vref connected

Must always be set to “0”

Invalid in one-shot mode

Frequency select bit1

0 : fAD/2 or fAD/4 is selected

1 : fAD is selected

CKS1

Notes 1: If the A-D control register is rewritten during A-D conversion, the conversion result

is indeterminate.

(Note 2)

2: When selecting fAD/1, always be sure to set the A-D control register 0 bit 7 (CKS0) to “1”.

Also , if f(Xin) exceeds 10 MHz, lower the

φA-D frequency to 10 MHz or below by dividing it.

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