DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 589

• Manufacturer Part Number: DF2398TE20
• Description: IC H8S MCU FLASH 256K 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K 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: 120-TQFP, 120-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2398TE20; HD64F2398TE20

17.3
The D/A converter includes D/A conversion circuits for two channels, each of which can operate independently.
D/A conversion is performed continuously while enabled by DACR. If either DADR0 or DADR1 is written to, the new
data is immediately converted. The conversion result is output by setting the corresponding DAOE0 or DAOE1 bit to 1.
The operation example described in this section concerns D/A conversion on channel 0. Figure 17-2 shows the timing of
this operation.
[1] Write the conversion data to DADR0.
[2] Set the DAOE0 bit in DACR to 1. D/A conversion is started and the DA0 pin becomes an output pin. The conversion
[3] If DADR0 is written to again, the new data is immediately converted. The new conversion result is output after the
[4] If the DAOE0 bit is cleared to 0, the DA0 pin becomes an input pin.
result is output after the conversion time has elapsed. The output value is expressed by the following formula:
The conversion results are output continuously until DADR0 is written to again or the DAOE0 bit is cleared to 0.
conversion time has elapsed.
DADR contents
Operation
256
ø
Address
DADR0
DAOE0
DA0
Legend:
t
DCONV
: D/A conversion time
High-impedance state
write cycle
DADR0
V
ref
Figure 17-2 Example of D/A Converter Operation
write cycle
DACR
Conversion data 1
t
DCONV
Conversion
result 1
write cycle
DADR0
t
DCONV
Rev.6.00 Oct.28.2004 page 559 of 1016
Conversion data 2
Conversion
result 2
write cycle
DACR
REJ09B0138-0600H