HD64F2676VFC33 Renesas Electronics America, HD64F2676VFC33 Datasheet - Page 812

• Manufacturer Part Number: HD64F2676VFC33
• Description: IC H8S MCU FLASH 256K 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2676VFC33

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 33MHz
• Connectivity: IrDA, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 103
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 16 A/D Converter
16.7.3
Adding capacitance results in coupling with GND, and therefore noise in GND may adversely
affect absolute precision. Be sure to make the connection to an electrically stable GND such as
AVss.
Care is also required to insure that filter circuits do not communicate with digital signals on the
mounting board, so acting as antennas.
16.7.4
If conditions shown below are not met, the reliability of the device may be adversely affected.
16.7.5
In board design, digital circuitry and analog circuitry should be as mutually isolated as possible,
and layout in which digital circuit signal lines and analog circuit signal lines cross or are in close
proximity should be avoided as far as possible. Failure to do so may result in incorrect operation
of the analog circuitry due to inductance, adversely affecting A/D conversion values.
Also, digital circuitry must be isolated from the analog input signals (AN0 to AN7 and AN12 to
AN15), analog reference power supply (Vref), and analog power supply (AVcc) by the analog
ground (AVss). Also, the analog ground (AVss) should be connected at one point to a stable
digital ground (Vss) on the board.
Rev. 3.00 Mar 17, 2006 page 760 of 926
REJ09B0283-0300
Analog input voltage range
The voltage applied to analog input pin ANn during A/D conversion should be in the range
AVss
Relation between AVcc, AVss and Vcc, Vss
As the relationship between AVcc, AVss and Vcc, Vss, set AVcc
the A/D converter is not used, the AVcc and AVss pins must not be left open.
Vref setting range
The reference voltage at the Vref pin should be set in the range Vref
Influences on Absolute Precision
Setting Range of Analog Power Supply and Other Pins
Notes on Board Design
V
A
n
Vref.
Vcc and AVss = Vss. If
AVcc.