DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 673

• Manufacturer Part Number: DF61657CN35FTV
• Description: IC H8SX/1657 MCU FLASH 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of DF61657CN35FTV

• Core Processor: H8SX
• Core Size: 32-Bit
• Speed: 35MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 768KB (768K x 8)
• Program Memory Type: FLASH
• Ram Size: 24K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 120-TQFP, 120-VQFP
• For Use With: 3DK1657 - DEV EVAL KIT FOR H8SX/1657
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

16.4
The D/A converter includes D/A conversion circuits for two channels, each of which can operate
independently. When the DAOE bit in DACR01 is set to 1, D/A conversion is enabled and the
conversion result is output.
An operation example of D/A conversion on channel 0 is shown below. Figure 16.2 shows the
timing of this operation.
1. Write the conversion data to DADR0.
2. Set the DAOE0 bit in DACR01 to 1 to start D/A conversion. The conversion result is output
3. If DADR0 is written to again, the conversion is immediately started. The conversion result is
4. If the DAOE0 bit is cleared to 0, analog output is disabled.
from the analog output pin DA0 after the conversion time t
result continues to be output until DADR0 is written to again or the DAOE0 bit is cleared to 0.
The output value is expressed by the following formula:
output after the conversion time t
Contents of DADR/256 × V
Operation
Pφ
Address
DADR0
DAOE0
DA0
[Legend]
t
DCONV
: D/A conversion time
High-impedance state
write cycle
DADR0
Figure 16.2 Example of D/A Converter Operation
write cycle
DACR01
ref
DCONV
Conversion data 1
has elapsed.
t
DCONV
Conversion
result 1
write cycle
DADR0
Rev. 2.00 Jun. 28, 2007 Page 647 of 864
DCONV
t
DCONV
has elapsed. The conversion
Conversion data 2
Conversion
Section 16 D/A Converter
result 2
write cycle
DACR01
REJ09B0341-0200