HD6417727F100C Renesas Electronics America, HD6417727F100C Datasheet - Page 941

• Manufacturer Part Number: HD6417727F100C
• Description: IC SUPERH MPU ROMLESS 240QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417727F100C

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: FIFO, SCI, SIO, SmartCard, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 104
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 2.05 V
• Data Converters: A/D 6x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 240-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

29.3
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 29.2.
1. Data to be converted is written in DADR0.
2. Bit DAOE0 is set to 1 in DACR. D/A conversion starts and DA0 becomes an output pin. The
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, DA0 becomes an input pin.
converted result is output after the conversion time. The output value is (DADR0 contents/256)
× AVcc. Output of this conversion result continues until the value in DADR0 is modified or
the DAOE0 bit is cleared to 0.
the conversion time.
Pφ
Address bus
DADR0
DAOE0
DA0
Legend:
t
DCONV
Operation
: D/A conversion time
write cycle
DADR0
High-impedance state
Figure 29.2 Example of D/A Converter Operation
write cycle
DACR
Conversion data 1
t
DCONV
Conversion
result 1
Rev.6.00 Mar. 27, 2009 Page 883 of 1036
write cycle
DADR0
t
DCONV
Section 29 D/A Converter
Conversion data 2
Conversion
result 2
REJ09B0254-0600
write cycle
DACR