M32C83T datasheet(253/527 Pages) RENESAS

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Page 230

17. A/D Converter

)

(

Function

A/D0 Control Register 2(1)

Bit Name

Bit

Symbol

Address

After Reset

AD0CON2

039416

X000 00002

SMP

ADS

(b3 - b1)

TRG0

TRG1

A/D Conversion

Method Select Bit

0 : Without the sample and hold function

1 : With the sample and hold function

Reserved Bit

Set to "0"

0 : Disables channel replacement

1 : Enables channel replacement(5)

PST

External Trigger

Request Cause

Select Bit

A/D Channel Replace

Select Bit(2)

Simultaneous

Start Bit(2, 3, 4)

b6 b5

When this bit is set to "1", A/D0 and

A/D1 start conversions simultaneously.

When read, its content is indeterminate.

0 0 : Selects ADTRG

0 1 : Selects a timer B2 interrupt

request of the three-phase motor

control timer functions (after

ICTB2 counter completes

counting)

1 0 : Selects the intelligent I/O group 2

channel 1 interrupt

1 1 : Do not set to this value

NOTES:

1. When the AD0CON2 register is rewritten during the A/D conversion, the conversion result is

indeterminate.

2. Do not set the APS1 and APS0 bits to "1" while either A/D0 or A/D1 is operating.

3. The PST bit is enabled when the TRG bit in the AD0CON0 register is set to "0" (software trigger).

Do not set the PST bit to "1" when the TRG bit is set to "1" (external trigger).

4. Set both A/D0 and A/D1 to the same setting.

5. If the ADS bit is set to "1", do not select single sweep mode or repeat sweep mode as the A/D

operation mode.

000

Figure 17.4 AD0CON2 Register, AD00 to AD07 Registers

Function

A/D0 Register i (i =0 to 7)

Symbol

Address

After Reset

AD00 to AD02

038116 - 038016, 038316 - 038216, 038516 - 038416

Indeterminate

AD03 to AD05

038716 - 038616, 038916 - 038816, 038B16 - 038A16

Indeterminate

AD06 to AD07

038D16 - 038C16, 038F16 - 038E16

Indeterminate

8 low-order bits in an A/D conversion result

Nothing is assigned. When write, set to "0".

When read, its content is indeterminate.

In 10-bit mode

In 8-bit mode

: 2 high-order bits in an A/D conversion result

: When read, its contents is indeterminate.

b15

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