HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 996
HD6417720BP133BV
Manufacturer Part Number
HD6417720BP133BV
Description
SH3-DSP, WITH USB AND LCDC, PB-F
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.R8A77210C133BAV.pdf
(1478 pages)
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
-
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Section 27 A/D Converter
27.4
The A/D converter operates by successive approximations with 10-bit resolution. It has three
operating modes: single mode, multi mode, and scan mode.
27.4.1
Single mode should be selected when only one A/D conversion on one channel is required. A/D
conversion starts when the ADST bit in the A/D control/status register (ADCSR) is set to 1 by
software. The ADST bit remains set to 1 during A/D conversion and is automatically cleared to 0
when conversion ends.
When conversion ends the ADF bit in ADCSR is set to 1. If the ADIE bit in ADCSR is also set to
1 and DMASL is cleared to 0, an ADI interrupt is requested at this time. To clear the ADF flag to
0, first read ADF, then write 0 to ADF.
When the mode or analog input channel must be switched during A/D conversion, to prevent
incorrect operation, first clear the ADST bit to 0 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 mode or channel is changed.
Typical operations when channel 1 (AN1) is selected in single mode are described next.
Figure 27.2 shows a timing diagram for this example.
1. Start the clock supply to the ADC module (clear the MSTP33 bit in STBCR3 to 0) to run the
2. Single mode is selected (MULTI = 0), input channel AN1 is selected (CH2 = CH1 = 0, CH0 =
3. When A/D conversion is completed, the result is transferred into ADDRB. At the same time
4. When ADF = 1, ADIE = 1, and DMASL = 0, an ADI interrupt is requested.
5. The A/D interrupt handling routine starts.
6. The routine reads ADF, then writes 0 to the ADF flag.
7. The routine reads and processes the conversion result (ADDRB = 0).
8. Execution of the A/D interrupt handling routine ends.
9. Stop the clock supply to the ADC module (set the MSTP33 bit in STBCR3 to 1) to place the
Page 936 of 1414
ADC module.
1), the A/D interrupt is enabled (ADIE = 1), and A/D conversion is started (ADST = 1).
the ADF flag is set to 1, the ADST bit is cleared to 0, and the A/D converter becomes idle.
ADC in the module standby state.
Single Mode
Operation
SH7720 Group, SH7721 Group
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010
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