M32C80 Datasheet, PDF (249/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
17. A/D Converter
17.1.4 Repeat Sweep Mode 0
In repeat sweep mode 0, analog voltage applied to selected pins is repeatedly converted to a digital code.
Table 17.5 lists specifications of repeat sweep mode 0.
Table 17.5 Repeat Sweep Mode 0 Specifications
Item
Specification
Function
The SCAN1 and SCAN0 bits in the AD0CON1 register select pins. Analog voltage
applied to the pins 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 from AN0 and AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins) or AN0
to AN7 (8 pins)
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 selected pins
• When the 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 230} of 330
REJ09B0271-0100