HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 392

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.3
The D/A converter module has two built-in D/A converter circuits that can operate independently.
D/A conversion is performed continuously whenever enabled by the D/A control register. When a
new value is written in DADR0 or DADR1, conversion of the new value begins immediately. The
converted result is output by setting the DAOE0 or DAOE1 bit to 1.
An example of conversion on channel 0 is given next. Figure 16.2 shows the timing.
1. Software writes the data to be converted in DADR0.
2. D/A conversion begins when the DAOE0 bit in DACR is set to 1. After a conversion delay,
3. If a new value is written in DADR0, conversion begins immediately. Output of the converted
4. When the DAOE0 bit is cleared to 0, DA0 becomes an input pin.
360
ø
Address
DADR0
DAOE0
DA0
t
DCONV
analog output appears at the DA0 pin. The output value is AV
This output continues until a new value is written in DADR0 or the DAOE0 bit is cleared to 0.
result begins after the conversion delay time.
: D/A conversion time
Operation
DADR0
write cycle
High-impedance state
DACR
write cycle
Figure 16.2 D/A Conversion (Example)
Conversion data (1)
t
DCONV
Conversion result (1)
DADR0
write cycle
ref
(DADR0 value)/256.
t
DCONV
Conversion data (2)
Conversion result (2)
DACR
write cycle