DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 676
DF2148RTE20IV
Manufacturer Part Number
DF2148RTE20IV
Description
MCU 5V 128K I-TEMP,PB-FREE, 100-
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Specifications of DF2148RTE20IV
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
Host Interface, I²C, IrDA, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
74
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 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
Lead free / RoHS Compliant
Eeprom Size
-
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Section 20 A/D Converter
20.6
The following points should be noted when using the A/D converter.
Setting Range of Analog Power Supply and Other Pins
1. Analog input voltage range
2. Digital input voltage range
3. Relation between AV
4. Setting Range of AVref Pin:
If conditions 1 to 4 above are not met, the reliability of the device may be adversely affected.
Notes on Board Design
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), analog
reference power supply (AVref), 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.
Notes on Noise Countermeasures
A protection circuit connected to prevent damage due to an abnormal voltage such as an excessive
surge at the analog input pins (AN0 to AN7) or analog reference power supply pin (AVref) should
be connected between AVCC and AVSS as shown in figure 20.7.
Rev. 4.00 Sep 27, 2006 page 630 of 1130
REJ09B0327-0400
The voltage applied to the ANn analog input pins during A/D conversion should be in the
range AV
The voltage applied to the CINn digital input pins should be in the range AV
and V
As the relationship between AV
not used, the AVCC and AVSS pins must on no account be left open.
The reference voltage supplied via the AVref pin should be in the range AV
SS
Usage Notes
SS
CINn
ANn
V
CC
AV
CC
(n = 0 to 15).
, AV
ref
(n = 0 to 7).
SS
and V
CC
, AV
CC
, V
SS
and V
SS
CC
, V
SS
, set AV
SS
= V
SS
. If the A/D converter is
ref
SS
AV
CINn
CC
.
AV
ref
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