HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 1006

• Manufacturer Part Number: HD6417720BP133BV
• Description: SH3-DSP, WITH USB AND LCDC, PB-F
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417720BP133BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: FIFO, I²C, IrDA, MMC, SCI, SD, SIO, SIM, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 117
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 27 A/D Converter
27.7
27.7.1
(1)
Problem: Even though the ADCSR.ADF bit has been read as 1 and 0 was then written to the ADF
bit, the ADF bit has not been cleared to 0.
Condition: This problem arises when reading of the ADF bit coincides with setting of the bit to 1
upon the end of A/D conversion.
Avoiding the Problem: Follow any of procedures (a), (b), or (c) below.
(2)
Problem: A/D conversion in scan mode is not stopped by clearing the ADCSR.ADST bit (to 0).
Condition: This problem arises when 0 is written to the ADST bit in ADCSR to stop A/D
conversion while A/D conversion in scan mode is in progress.
Avoiding the Problem: Place the ADC in module standby state after clearing the ADST bit (to 0).
Placing the ADC in the module standby state initializes the ADC and stops A/D conversion. When
further A/D conversion is required, restart A/D conversion after releasing the ADC from the
module standby state.
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(a) Ensure that setting of the ADF bit to 1 upon the end of A/D conversion does not coincide
(b) If the ADF bit has not been cleared, repeat the operation of reading it as 1 and then
(c) Initialize the ADC and clear the ADF bit by placing the ADC in the module standby state.
Notes on Clearing the ADF Bit in the ADCSR Register
Notes on A/D Conversion in Scan Mode
with reading of the ADF bit. For example, read the ADF bit as 1 and then write 0 to the
bit during processing of the A/D conversion end interrupt (ADI) that is generated at the
end of A/D conversion (when the ADF is set to 1).
writing 0 to it.
Usage Notes
Notes on A/D Conversion
SH7720 Group, SH7721 Group
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010