M30622ECTFP datasheet(150/184 Pages) MITSUBISHI

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Tentative Specifications REV.A

Mitsubishi microcomputers

M16C / 62T Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Specifications in this manual are tentative and subject to change.

Under

development

A-D Converter

(1) One-shot mode

In one-shot mode, the pin selected using the analog input pin select bit is used for one-shot A-D conver-

sion. Table 1.20.2 shows the specifications of one-shot mode. Figure 1.20.4 shows the A-D control regis-

ter in one-shot mode.

Table 1.20.2. One-shot mode specifications

Figure 1.20.4. A-D conversion register in one-shot mode

A-D control register 0 (Note 1)

Symbol

Address

When reset

ADCON0

03D616

00000XXX2

Analog input pin

select bit

CH0

Bit symbol

Bit name

Function

CH1

CH2

A-D operation mode

select bit 0

MD0

MD1

Trigger select bit

0 : Software trigger

1 : ADTRG trigger

TRG

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

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

BITS

8/10-bit mode select bit

0 : 8-bit mode

1 : 10-bit mode

VCUT

OPA0

Vref connect bit

OPA1

A-D operation mode

select bit 1

1 : Vref connected

External op-amp

connection mode bit

Invalid in one-shot mode

0 0 0 : AN0 is selected

0 0 1 : AN1 is selected

0 1 0 : AN2 is selected

0 1 1 : AN3 is selected

1 0 0 : AN4 is selected

1 0 1 : AN5 is selected

1 1 0 : AN6 is selected

(Note 2)

1 1 1 : AN7 is selected

(Note 3)

b2 b1 b0

0 0 : One-shot mode

(Note 3)

b4 b3

0 0 : ANEX0 and ANEX1 are not used

0 1 : ANEX0 input is A-D converted

1 0 : ANEX1 input is A-D converted

1 1 : External op-amp connection mode

b7 b6

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

result is indeterminate.

Note 2: AN00 to AN07, and AN20 to AN27 can be used the same as AN0 to AN7.

Note 3: When changing A-D operation mode, set analog input pin again.

Frequency select bit 1

0 : fAD/2 or fAD/4 is selected

1 : fAD is selected

CKS1

0 : Any mode other than repeat sweep mode 1

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

result is indeterminate.

Note 2: Divide the frequency if f(XIN) exceeds 10MHz, and make

φAD frequency

equal to 10MHz.

(Note 2)

Item

Specification

Function

The pin selected by the analog input pin select bit is used for one A-D conversion

Start condition

Writing “1” to A-D conversion start flag

Stop condition

• End of A-D conversion (A-D conversion start flag changes to “0”, except

when external trigger is selected)

• Writing “0” to A-D conversion start flag

Interrupt request generation timing

End of A-D conversion

Input pin

One of AN0 to AN7, as selected

(Note 1)

Reading of result of A-D converter

Read A-D register corresponding to selected pin

Note 1: AN00 to AN07, and AN20 to AN27 can be used the same as AN0 to AN7.

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