M32CSLASH86 datasheet(279/505 Pages) RENESAS

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Page 256

19. D/A Converter

)

(

Function

D/A Control Register

Bit Name

Bit

Symbol

Address

After Reset

DACON

039C16

XXXX XX002

D/A0 Output Enable Bit

D/A1 Output Enable Bit

Nothing is assigned. When write, set to "0".

When read, its content is indeterminate.

0 : Disables an output

1 : Enables an output

0 : Disables an output

1 : Enables an output

DA1E

(b7 - b2)

DA0E

D/A Register i (i=0, 1)

Symbol

Address

After Reset

DA0, DA1

039816, 039A16

Indeterminate

Function

Setting Range

Output value of D/A conversion

0016 to FF16

VREF(4)

AVSS

DA0E

DA0

"1"

"0"

MSB

LSB

D/A register 0

NOTES:

1. The above applies when the DA0 register is set to "2A16".

2. This circuitry is the same for D/A1.

3. To reduce power consumption when the D/A converter is not used, set the DAiE bit (i=0, 1) to "0"

(output disabled) and the DAi register to "0016" to stop current from flowing into the R-2R resistor.

4. VREF is not related to VCUT bit setting in the AD0CON1 register.

Figure 19.2 DACON Register, DA0 and DA1 Registers

Figure 19.3 D/A Converter Equivalent Circuit

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