M32C80 Datasheet, PDF (247/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
17. A/D Converter
17.1.2 Repeat Mode
In repeat mode, analog voltage applied to a selected pin is repeatedly converted to a digital code. Table
17.3 lists specifications of repeat mode.
Table 17.3 Repeat Mode Specifications
Item
Specification
Function
The CH2 to CH0 bits in the AD0CON0 register and the OPA1 and OPA0 bits in the
AD0CON1 register select a pin. Analog voltage applied to the pin is repeatedly
converted to a digital code
Start Condition
Same as one-shot mode
Stop Condition
The ADST bit in the AD0CON0 register is set to "0" (A/D conversion stopped) by
program
Interrupt Request Generation Timing • When the DUS bit in the AD0CON3 register is set to "0" (DMAC operating
mode disabled), no interrupt request is generated.
• When DUS bit is set to "1" (DMAC operating mode enabled), an interrupt request
is generated every time an A/D conversion is completed.
Analog Voltage Input Pins
Select one pin from AN0 to AN7, ANEX0, or ANEX1
Reading of A/D Conversion Result • When the DUS bit is set to "0", the microcomputer reads the AD0j register (j=0 to
7) corresponding to the selected pin.
• When DUS bit is set to "1", do not read the AD00 register. A/D conversion result
is stored in the AD00 register after the A/D conversion is completed. DMAC
transfers the conversion result to any memory space.
Refer to 12. DMAC for DMAC settings
Rev. 1.00 Nov. 01, 2005 ^{Page 228} of 330
REJ09B0271-0100