HD64F3048BF25 Renesas Electronics America, HD64F3048BF25 Datasheet - Page 588
HD64F3048BF25
Manufacturer Part Number
HD64F3048BF25
Description
IC H8 MCU FLASH 128K 100QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Datasheet
1.DF3048BF25V.pdf
(903 pages)
Specifications of HD64F3048BF25
Core Processor
H8/300H
Core Size
16-Bit
Speed
8MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
70
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K 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-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HD64F3048BF25
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD64F3048BF25V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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Section 15 A/D Converter
7. Allowable Signal-Source Impedance: The analog inputs of the H8/3048B Group are designed
8. Effect on Absolute Accuracy: Attaching an external capacitor creates a coupling with ground,
Rev. 3.00 Sep 27, 2006 page 560 of 872
REJ09B0325-0300
Sensor
input
to assure accurate conversion of input signals with a signal-source impedance not exceeding
10 k (
rating is that it enables the input capacitor in the sample-and-hold circuit in the A/D converter
to charge within the sampling time. If the sensor output impedance exceeds 10 k , charging
may be inadequate and the accuracy of A/D conversion cannot be guaranteed.
If a large external capacitor is provided in scan mode, then the internal 10-k input resistance
becomes the only significant load on the input. In this case the impedance of the signal source
is not a problem.
A large external capacitor, however, acts as a low-pass filter. This may make it impossible to
track analog signals with high dv/dt (e.g. a variation of 5 mV/µs) (figure 15.11). To convert
high-speed analog signals or to use scan mode, insert a low-impedance buffer.
so if there is noise on the ground line, it may degrade absolute accuracy. The capacitor must be
connected to an electrically stable ground, such as AV
If a filter circuit is used, be careful of interference with digital signals on the same board, and
make sure the circuit does not act as an antenna.
Sensor output impedance
Up to 10 k
Up to 5 k
Low-pass
filter
Up to 0.1 F
13 MHz) or not exceeding 5 k ( > 13 MHz) (table 15.5). The reason for this
Figure 15.11 Analog Input Circuit (Example)
13 MHz)
13 MHz)
H8/3048B Group
Cin =
15 pF
SS
.
10 k
Equivalent circuit of
A/D converter
20 pF
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