HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 761
HD64F2638F20J
Manufacturer Part Number
HD64F2638F20J
Description
IC H8S MCU FLASH 256K 128-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2600r
Specifications of HD64F2638F20J
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, SCI, SmartCard
Peripherals
Motor Control PWM, POR, PWM, WDT
Number Of I /o
72
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
18.3
The D/A converter module has one on-chip D/A converter circuits that can operate independently.
D/A conversion is performed continuously whenever enabled by the D/A control register (DACR).
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 18-2 shows the timing.
• Software writes the data to be converted in DADR0.
• D/A conversion begins when the DAOE0 bit in DACR is set to 1. After the elapse of the
• If a new value is written in DADR0, conversion begins immediately. Output of the converted
• When the DAOE0 bit is cleared to 0, DA0 becomes an input pin.
REJ09B0103-0800 Rev. 8.00
May 28, 2010
φ
Address
DADR0
DAOE0
DA0
Legend:
t
DCONV
conversion time, analog output appears at the DA0 pin. Contents of DADR / 256 × Vref
This output continues until a new value is written in DADR0 or the DAOE0 bit is cleared to 0.
result begins after the conversion time.
: D/A conversion time
Operation
DADR0
write cycle
High-impedance state
DACR
write cycle
Figure 18-2 D/A Conversion (Example)
Conversion data (1)
t
DCONV
Conversion result (1)
DADR0
write cycle
t
DCONV
Conversion data (2)
Conversion result (2)
Section 18 D/A Converter
Page 711 of 1458
DACR
write cycle
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