R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 925

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SH7201 Group
20.5
The A/D converter generates an A/D conversion end interrupt (ADI) at the end of A/D conversion.
An ADI interrupt request is generated if the ADIE bit is set to 1 when the ADF bit in ADCSR is
set to 1 on completion of A/D conversion. Note that the direct memory access controller (DMAC)
can be activated by an ADI interrupt depending on the interrupt controller (INTC) setting. In this
case, an interrupt is not issued to the CPU. If the setting to activate the DMAC has not been made,
an interrupt request is sent to the CPU. Having the converted data read by the DMAC in response
to an ADI interrupt enables continuous conversion to be achieved without imposing a load on
software.
In single mode, set the DMAC so that DMA transfer initiated by an ADI interrupt is performed
only once. In the case of A/D conversion on multiple channels in scan mode or multi mode, setting
the DMA transfer count to one causes DMA transfer to finish after transferring only one channel
of data. To make the DMAC transfer all conversion data, set the ADDR where A/D conversion
data is stored as the transfer source address, the number of converted channels × 2 as the transfer
byte count, and continuous operand transfer or non-stop transfer as the DMA transfer condition.
When the DMAC is activated by ADI, the ADF bit in ADCSR is automatically cleared to 0 when
data is transferred by the DMAC.
Table 20.6 Relationship between Interrupt Sources and DMAC Transfer Request
20.6
The A/D converter compares an analog value input from an analog input channel with its analog
reference value and converts it to 10-bit digital data. The absolute accuracy of this A/D conversion
is the deviation between the input analog value and the output digital value. It includes the
following errors:
• Offset error
• Full-scale error
• Quantization error
• Nonlinearity error
R01UH0026EJ0300 Rev. 3.00
Sep 24, 2010
Name
ADI
Interrupt Sources and DMAC Transfer Request
Definitions of A/D Conversion Accuracy
Interrupt Source
A/D conversion end
Interrupt Flag
ADF in ADCSR
DMAC Activation
Possible
Section 20 A/D Converter (ADC)
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