HD64F2239TF20I Renesas Electronics America, HD64F2239TF20I Datasheet - Page 767

• Manufacturer Part Number: HD64F2239TF20I
• Description: MCU 3V 384K I-TEMP 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of HD64F2239TF20I

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

17.8.4
If the conditions below are not met, the reliability of the device may be adversely affected.
• Analog input voltage range
• Relationship between AVcc, AVss and Vcc, Vss
• Vref range
17.8.5
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 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.
17.8.6
A protection circuit should be connected in order to prevent damage due to abnormal voltage, such
as an excessive surge at the analog input pins (AN0 to AN7), between AVcc and AVss, as shown
in figure 17.10. Also, the bypass capacitors connected to AVcc and the filter capacitor connected
to AN0 to AN7 must be connected to AVss.
If a filter capacitor is connected, the input currents at the analog input pins (AN0 to AN7) are
averaged, and so an error may arise. Also, when A/D conversion is performed frequently, as in
scan mode, if the current charged and discharged by the capacitance of the sample-and-hold circuit
in the A/D converter exceeds the current input via the input impedance (R
the analog input pin voltage. Careful consideration is therefore required when deciding circuit
constants.
The voltage applied to analog input pin ANn during A/D conversion should be in the range
AVss ≤ ANn ≤ AVcc.
Set AVss = Vss as the relationship between AVcc, AVss and Vcc, Vss. If the A/D converter is
not used, the AVcc and AVss pins must not be left open. In addition, AN0 and AN1 may be
used only when Vcc = AVcc in the case of the H8S/2239 Group, H8S/2227 Group,
H8S/2238R, and H8S/2236R.
The reference voltage input from the Vref pin should be set to AVcc or less.
Notes on Noise Countermeasures
Range of Analog Power Supply and Other Pin Settings
Notes on Board Design
Rev. 6.00 Mar. 18, 2010 Page 705 of 982
Section 17 A/D Converter
in
), an error will arise in
REJ09B0054-0600