DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 566

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 15 A/D Converter
15.5
The A/D converter generates an interrupt (ADI) at the end of A/D conversion. The ADI interrupt
request can be enabled or disabled by the ADIE bit in ADCSR.
15.6
When using the A/D converter, note the following points:
1. Note on Board Design
2. Note on Noise
Rev. 3.00 Mar 21, 2006 page 536 of 814
REJ09B0302-0300
In board layout, separate the digital circuits from the analog circuits as much as possible.
Particularly avoid layouts in which the signal lines of digital circuits cross or closely approach
the signal lines of analog circuits. Induction and other effects may cause the analog circuits to
operate incorrectly, or may adversely affect the accuracy of A/D conversion.
The analog input signals (AN
voltage (AV
analog ground (AV
board.
To prevent damage from surges and other abnormal voltages at the analog input pins (AN
AN
figure 15.7 between AV
the filter capacitors connected to AN
like the ones in figure 15.7 are connected, the voltage values input to the analog input pins
(AN
conversion is frequently performed in scan mode so that the current that charges and
discharges the capacitor in the sample-and-hold circuit of the A/D converter becomes greater
than that input to the analog input pins via input impedance R
therefore be selected carefully.
7
) and analog reference voltage pin (V
0
to AN
Interrupts
Usage Notes
7
CC
) will be smoothed, which may give rise to error. Error can also occur if A/D
) must be separated from digital circuits by the analog ground (AV
SS
) should be connected to a stable digital ground (V
CC
and AV
0
to AN
SS
. The bypass capacitors connected to AV
0
7
), analog reference voltage (V
to AN
REF
7
), connect a protection circuit like the one in
must be connected to AV
in
. The circuit constants should
REF
), and analog supply
SS
SS
. If filter capacitors
) at one point on the
CC
and V
SS
). The
REF
0
and
to