R5F72115D160FPV datasheet(825/1228 Pages) RENESAS

825 / 1228 page

Section 18 D/A Converter (DAC)

Rev. 2.00 May. 08, 2008 Page 801 of 1200

REJ09B0344-0200

18.5

Usage Notes

18.5.1

Module Standby Mode Setting

Operation of the D/A converter can be disabled or enabled using the standby control register. The

initial setting is for operation of the D/A converter to be halted. Register access is enabled by

canceling module standby mode. For details, see section 23, Power-Down Modes.

18.5.2

D/A Output Hold Function in Software Standby Mode

When this LSI enters software standby mode with D/A conversion enabled, the D/A outputs are

retained, and the analog power supply current is equal to as during D/A conversion. If the analog

power supply current needs to be reduced in software standby mode, clear the DAOE0, DAOE1,

and DAE bits to 0 to disable the D/A outputs.

18.5.3

Setting Analog Input Voltage

The reliability of this LSI may be adversely affected if the following voltage ranges are exceeded.

1. AVcc and AVss input voltages

Input voltages AVcc and AVss should be Vcc

≤ AVcc ≤ 5.0 V ± 0.5 V and AVss = Vss. Do

not leave the AVcc and AVss pins open when the A/D converter or D/A converter is not in use

and in software standby mode. When not in use, connect AVcc to the power supply (VccQ)

and AVss to the ground (VssQ).

2. Setting range of AVREF input voltage

Set the voltage range of the AVREF pin as AVREF = AVcc ± 0.3 V when the A/D converter

or D/A converter is used, or as AVREF = AVcc when no A/D converter or D/A converter is

used.

R5F72115D160FPV Datasheet(PDF) 825 Page - Renesas Technology Corp