M32CSLASH8B datasheet(282/406 Pages) RENESAS

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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 265 of 385

18.1.6

Multi-Port Single Sweep Mode

In multi-port single sweep mode, analog voltage applied to 16 selected pins is converted to a digital code once

for each pin. Set the DUS bit in the AD0CON3 register to 1 (DMAC operating mode used).

Table 18.9 lists specifications of multi-port single sweep mode.

Table 18.9

Multi-Port Single Sweep Mode Specifications

Item

Specification

Function

Analog voltage applied to the 16 selected pins is repeatedly converted once for

each pin in the following order: AN_0 to AN_7

→ ANi_0 to ANi_7 (i = 0, 2, 15)

Analog input pins

Select one of the following.

• AN_0

→ AN_1 → . . . → AN_7 → AN0_0 → AN0_1→ . . . → AN0_7

• AN_0

→ AN_1 → . . . → AN_7 → AN2_0 → AN2_1→ . . . → AN2_7

• AN_0

→ AN_1 → . . . → AN_7 → AN15_0 → AN15_1→ . . . → AN15_7

The following register settings determine which pins are used:

Bits MPS11 and MPS10 in the AD0CON4 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 sequence of A/D conversions 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 An interrupt request is generated every time each A/D conversion is completed

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