DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 579

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

16.3
The D/A converter has two built-in D/A conversion circuits that can perform conversion
independently.
D/A conversion is performed constantly while enabled in DACR. If the DADR0 or DADR1 value
is modified, conversion of the new data begins immediately. The conversion results are output
when bits DAOE0 and DAOE1 are set to 1.
An example of D/A conversion on channel 0 is given next. Timing is indicated in figure 16.2.
1. Data to be converted is written in DADR0.
2. Bit DAOE0 is set to 1 in DACR. D/A conversion starts and DA
3. If the DADR0 value is modified, conversion starts immediately, and the result is output after
4. When the DAOE0 bit is cleared to 0, DA
converted result is output after the conversion time. The output value is (DADR0 contents/256)
DAOE0 bit is cleared to 0.
the conversion time.
V
REF
Address
bus
DADR0
DAOE0
DA
Legend:
t
DCONV
Operation
. Output of this conversion result continues until the value in DADR0 is modified or the
0
: D/A conversion time
DADR0
write cycle
High-impedance state
Figure 16.2 Example of D/A Converter Operation
DACR
write cycle
Conversion data 1
t
DCONV
0
becomes an input pin.
Conversion
result 1
DADR0
write cycle
Rev. 3.00 Mar 21, 2006 page 549 of 814
t
0
DCONV
becomes an output pin. The
Conversion data 2
Section 16 D/A Converter
Conversion
result 2
DACR
write cycle
REJ09B0302-0300