DF2315VTE25 Renesas Electronics America, DF2315VTE25 Datasheet - Page 577
DF2315VTE25
Manufacturer Part Number
DF2315VTE25
Description
MCU 3V 384K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Specifications of DF2315VTE25
Core Processor
H8S/2000
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
70
Program Memory Size
384KB (384K x 8)
Program Memory Type
FLASH
Ram Size
8K 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
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
DF2315VTE25V
Manufacturer:
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Quantity:
10 000
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14.4.2
Scan mode is useful for monitoring analog inputs in a group of one or more channels. When the
ADST bit is set to 1 by software, or by timer or external trigger input, A/D conversion starts on the
first channel in the group (AN0). When two or more channels are selected, after conversion of the
first channel ends, conversion of the second channel (AN1) starts immediately. A/D conversion
continues cyclically on the selected channels until the ADST bit is cleared to 0. The conversion
results are transferred for storage into the ADDR registers corresponding to the channels.
When the operating mode or analog input channel must be changed during analog conversion, to
prevent incorrect operation, first clear the ADST bit to 0 in ADCSR to halt A/D conversion. After
making the necessary changes, set the ADST bit to 1 to start A/D conversion again. The ADST
bit can be set at the same time as the operating mode or input channel is changed.
Typical operations when three channels (AN0 to AN2) are selected in scan mode are described
next. Figure 14.4 shows a timing diagram for this example.
[1] Scan mode is selected (SCAN = 1), scan group 0 is selected (CH2 = 0), analog input channels
[2] When A/D conversion of the first channel (AN0) is completed, the result is transferred to
[3] Conversion proceeds in the same way through the third channel (AN2).
[4] When conversion of all the selected channels (AN0 to AN2) is completed, the ADF flag is set
[5] Steps [2] to [4] are repeated as long as the ADST bit remains set to 1. When the ADST bit is
AN0 to AN2 are selected (CH1 = 1, CH0 = 0), and A/D conversion is started (ADST = 1)
ADDRA. Next, conversion of the second channel (AN1) starts automatically.
to 1 and conversion of the first channel (AN0) starts again. If the ADIE bit is set to 1 at this
time, an ADI interrupt is requested after A/D conversion ends.
cleared to 0, A/D conversion stops. After that, if the ADST bit is set to 1, A/D conversion
starts again from the first channel (AN0).
Scan Mode (SCAN = 1)
Section 14 A/D Converter (8 Analog Input Channel Version)
Rev.7.00 Feb. 14, 2007 page 543 of 1108
REJ09B0089-0700
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