M32C83T datasheet(260/527 Pages) RENESAS

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Page 237

17. A/D Converter

)

(

Table 17.9 Trigger Select Function Settings

Bit and Setting

Trigger

ADiCON0 Register

ADiCON2 Register

TRG = 0

Software trigger

The A/Di starts the A/D conversion when the ADST bit in the

ADiCON0 register is set to "1"

Two-circuit simultaneous start

A/D0 and A/D1 start the A/D conversion simultaneously when the

PST bit in the AD0CON2 register is set to "1" by program (Refer to

17.2.4 Two-Circuit Simultaneous Start)

TRG = 1(1)

TRG1 to TRG0 = 002

External trigger(2)

__________

Falling edge of a signal applied to ADTRG

TRG1 to TRG0 = 012

Hardware trigger(2)

The timer B2 interrupt request of three-phase motor control timer

functions (after the ICTB2 counter completes counting)

TRG1 to TRG0 = 102

Hardware trigger(2)

The intelligent I/O interrupt request is generated

Channel 1 in the group 2 (A/D0), channel 1 in the group 3 (A/D1)

i= 0,1

NOTES:

1. The A/Di starts the A/D conversion when the ADST bit is set to "1" (A/D conversion started) and a trigger is

generated.

2. The A/D conversion is restarted if an external trigger or a hardware trigger is inserted during the A/D conversion.

(The A/D conversion in process is aborted.)

17.2.4 Two-Circuit Simultaneous Start (Software Trigger)

A/D0 and A/D1 start simultaneously when the PST bit in the AD0CON2 register is set to "1" (two-circuit

simultaneous start).

Do not set the PST bit to "1" while either A/D0 or A/D1 is performing an A/D conversion, or if the TRG bit

is set "1" (external trigger).

Do not set the ADST bit to "1" (A/D conversion started) when using the PST bit.

17.2.5 Pin Input Replacement Function

When the ADS bit in the AD0CON2 register is set to "1" (channel replacement enabled), channels of the

A/D0 can be replaced with channels of the A/D1 and vice versa.

Voltage applied to the ANj (j = 0 to 7) pin is converted to digital code in the A/D1 and the conversion result

is stored into the AD1j register. Voltage applied to the AN0j, AN2j or AN15j pin is converted to digital code

in the A/D0 and the conversion results are stored into the AD0j register.

To set the ADS bit to "1", set the MD1 to MD0 bits in the AD0CON0 register to "002" (one-shot mode) or

"012" (repeat mode). Single sweep, repeat sweep 0, and repeat sweep 1 modes cannot be used. Set the

OPA1 to OPA0 bits in the AD0CON1 register to "002" (no ANEX0 and ANEX1 used). Set the same value to

both AD0CON0 register and AD1CON0 register, and to both AD0CON1 register and AD1CON1 register.

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