M32CSLASH8B datasheet(276/406 Pages) RENESAS

276 / 406 page

Under development

M32C/8B Group

18. A/D Converter

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 259 of 385

18.1.1

One-Shot Mode

In one-shot mode, analog voltage applied to a selected pin is converted to a digital code once. Table 18.4 lists

specifications of one-shot mode.

Table 18.4

One-Shot Mode Specifications

Item

Specification

Function

Analog voltage applied to a selected pin is converted once

Analog input pins

Select one pin from AN_0 to AN_7, AN0_0 to AN0_7, AN2_0 to AN2_7, AN15_0

to AN15_7, ANEX0, or ANEX1.

The following register settings determine which pin is used:

• Bits CH2 to CH0 in the AD0CON0 register

• Bits OPA1 and OPA0 in the AD0CON1 register

• Bits APS1 and APS0 in the AD0CON2 register

Start Condition

Software trigger is selected (TRG bit in the AD0CON0 register = 0):

• The ADST bit in the AD0CON0 register is set to 1 (A/D conversion starts)

External trigger, hardware trigger is selected (TRG bit = 1):

• TRG0 bit in the AD0CON2 register = 0

The falling edge is detected on the ADTRG pin after the ADST bit is set to 1

• TRG0 bit = 1

Timer B2 interrupt request of three-phase motor control timer function (after

the ICTB2 register completes counting) is generated after the ADST bit is set

to 1.

Stop condition

• A/D conversion is completed (the ADST bit becomes 0 when software trigger is

selected).

• Set the ADST bit to 0 by a program (A/D conversion stops).

Interrupt request generation timing When the A/D conversion is completed

Reading A/D conversion result

• DMAC operating mode is not used (DUS bit in the AD0CON3 register = 0):

Read the AD0j register (j = 0 to 7) corresponding to a selected pin by a

program.

• DMAC operating mode is used (DUS bit = 1):

A/D conversion result is stored into the AD00 register after A/D conversion is

completed. Then, DMAC transfers the data from the AD00 register to a given

memory space. (Refer to 13. DMAC for DMAC settings)

M32C/8B Datasheet(PDF) 276 Page - Renesas Technology Corp

M32C/8B Datasheet(HTML) 276 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL