Special Operation Modes - Mitsubishi Electric M32R Series User Manual

Mitsubishi 32-bit risc single-chip microcomputers

Table of Contents

11.1.3 Special Operation Modes

(1) Forcible single mode execution during scan mode

This special operation mode forcibly executes single mode conversion (A-D conversion or

comparate) in a specified channel during scan mode operation. For A-D conversion mode, the

conversion result is stored in the 10-bit A-D Data Register corresponding to the specified

channel. For comparate mode, the conversion result is stored in the 10-bit A-D Comparate Data

completed, scan mode A-D conversion is restarted from where it was canceled during scan

To start single mode conversion during scan mode operation in software, choose a software

trigger using the Single Mode Register 0 A-D conversion start trigger select bit. Then, for A-D

conversion, set the said register's A-D conversion start bit to 1, or for comparate mode, write a

comparison value to the A-D Successive Approximation Register (AD0SAR or AD1SAR) during

scan mode operation.

To start single mode conversion during scan mode operation in hardware, choose a hardware

trigger using the Single Mode Register 0 A-D conversion start trigger select bit. Then enter the

hardware trigger selected with the said register (ADTRG signal or output event bus 3 for the A-D0

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converter, or ADTRG signal or TID1 overflow/underflow for the A-D1 converter).

An A-D conversion interrupt request or a DMA transfer request (for the A-D0 converter only) can

be generated at completion of conversion in the specified channel, or at completion of one cycle

of scan operation.

conversion starts

10-bit A-Di data register

Note 1: The canceled convert operation in channel 2 is reexecuted from the beginning.

Note 2: DMA transfer request: Can be generated for only the A-D0 converter.

Figure 11.1.7 Forcible Single Mode Execution during Scan Mode

Forcible single

mode execution starts

A-D conversion interrupt request or DMA transfer request (Note 2)

11.1 Outline of A-D Converters

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A-D CONVERTERS