HD64F2623FA20J Renesas Electronics America, HD64F2623FA20J Datasheet - Page 628
HD64F2623FA20J
Manufacturer Part Number
HD64F2623FA20J
Description
IC H8S MCU FLASH 256K 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2600r
Specifications of HD64F2623FA20J
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
53
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
12K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Section 16 A/D Converter
16.4.2
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 a software, 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 from the first
channel (AN0). 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 16.4 shows a timing diagram for this example.
[1] Scan mode is selected (SCAN = 1), channel set 0 is selected (CH3 = 0), scan group 0 is
[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
Rev. 5.00 Jan 10, 2006 page 602 of 1042
REJ09B0275-0500
selected (CH2 = 0), analog input channels 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)
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