Notes On A/D Conversion - Renesas R0E3308B0EPB00 User Manual

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R0E3308B0EPB00 User's Manual

Notes on A/D Conversion:

When selecting the MCU file "m308b0_ad.mcu" in the Init dialog box of the emulator debugger to execute the

A/D conversion debug, note the following.

• When using the analog input port selection function, and if you select AN00 to AN07 or AN20 to AN27 for the

"input". And you need to set the function selection register of port P15 for a pin that performs A/D conversion

to "I/O port". Furthermore, set the SW5 switches of the R0E3308B0EPBM0 for the pins used for the A/D

conversion to ON and the pins not used to OFF by each individual pin.

A/D0 control register 2 (address 394h)

b2,

Also, when the P0 and P2 groups are selected for A/D input, port P15 cannot be used as an I/O port. When

setting the register above, port P15 cannot be used as an I/O port even if A/D conversion is halting.

For the switch SW5, refer to "2.10.1 Setting Switches of Emulation Probe" (page 35).

• When setting the register below to use multi-port sweep mode, you need to set the direction register of port P15

for a pin that performs A/D conversion to "input".

And you need to set the function selection register of port P15 for a pin that performs A/D conversion to "I/O

port".

A/D0 control register 4 (address 392h)

b3,

Also, when the P0 and P2 groups are used for multi-port sweep mode, port P15 cannot be used as an I/O port.

When setting the register above, port P15 cannot be used as an I/O port even if A/D conversion is halting.

• Because a converter board and other devices are used between the evaluation MCU and the user system, the

A/D converter operates differently from an actual MCU. Make the final evaluation of the A/D converter using

an actual MCU.

R20UT0210EJ0200 Rev.2.00

Sep 16, 2010

IMPORTANT

: AN00 to AN07

: AN20 to AN27

: AN0 to AN7, AN00 to AN07

: AN0 to AN7, AN20 to AN27

4. Hardware Specifications

Page 87 of 98

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