HD6417706F133 Renesas Electronics America, HD6417706F133 Datasheet - Page 589
HD6417706F133
Manufacturer Part Number
HD6417706F133
Description
IC SUPERH MPU ROMLESS 176LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417706F133V.pdf
(751 pages)
Specifications of HD6417706F133
Core Processor
SH-3
Core Size
32-Bit
Speed
133MHz
Connectivity
EBI/EMI, FIFO, SCI, SmartCard
Peripherals
DMA, POR, WDT
Number Of I /o
103
Program Memory Type
ROMless
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
1.75 V ~ 2.05 V
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
176-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
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19.6
The A/D converter operates by successive approximations with 10-bit resolution. It has two
operating modes: single mode and scan mode.
19.6.1
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 ADCSR is set to 1 by software, or by external trigger
input. 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 is set to 1. If the ADIE bit is also set to 1, an ADI interrupt is
requested at this time. To clear the ADF flag to 0, first read ADCSR, then write 0 in 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 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 mode or channel is changed.
Typical operations when channel 1 (AN1) is selected in single mode are described next.
Figure 19.5 shows a timing diagram for this example.
1. Single mode is selected (MULTI = 0), input channel AN1 is selected (CH2 = CH1 = 0, CH0 =
2. When A/D conversion is completed, the result is transferred into ADDRB. At the same time
3. Since ADF = 1 and ADIE = 1, an ADI interrupt is requested.
4. The A/D interrupt processing routine starts.
5. The routine reads ADCSR, then writes 0 in the ADF flag.
6. The routine reads and processes the conversion result (ADDRB = 0).
7. Execution of the A/D interrupt processing routine ends. Then, when the ADST bit is set to 1,
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.
A/D conversion starts to execute 2 to 7 above.
Operation
Single Mode (MULTI = 0)
Rev. 5.00 May 29, 2006 page 539 of 698
Section 19 A/D Converter (ADC)
REJ09B0146-0500
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