DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 666
DF61657CN35FTV
Manufacturer Part Number
DF61657CN35FTV
Description
IC H8SX/1657 MCU FLASH 120TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8SX/1600r
Datasheet
1.DF61656N35FTV.pdf
(894 pages)
Specifications of DF61657CN35FTV
Core Processor
H8SX
Core Size
32-Bit
Speed
35MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
82
Program Memory Size
768KB (768K x 8)
Program Memory Type
FLASH
Ram Size
24K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
120-TQFP, 120-VQFP
For Use With
3DK1657 - DEV EVAL KIT FOR H8SX/1657
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Section 15 A/D Converter
15.7.3
Adding capacitance results in coupling with GND, and therefore noise in GND may adversely
affect absolute accuracy. Be sure to make the connection to an electrically stable GND such as
AVss.
Care is also required to insure that digital signals on the board do not interfere with filter circuits
and filter circuits do not act as antennas.
15.7.4
If the conditions shown below are not met, the reliability of the LSI may be adversely affected.
• Analog input voltage range
• Relation between AVcc, AVss and Vcc, Vss
• Vref setting range
15.7.5
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.
Digital circuitry must be isolated from the analog input pins (AN0 to AN7), 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 ground (Vss) on the board.
Rev. 2.00 Jun. 28, 2007 Page 640 of 864
REJ09B0341-0200
The voltage applied to analog input pin ANn during A/D conversion should be in the range
AVss ≤ V
As the relationship between AVcc, AVss and Vcc, Vss, set AVcc = Vcc ± 0.3 V and AVss =
Vss. If the A/D converter is not used, set AVcc = Vcc and AVss = Vss.
The reference voltage at the Vref pin should be set in the range Vref ≤ AVcc.
Influences on Absolute Accuracy
Setting Range of Analog Power Supply and Other Pins
Notes on Board Design
AN
≤ Vref.
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