DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 596
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DF2211NP24V
Manufacturer Part Number
DF2211NP24V
Description
H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
Manufacturer
Renesas Technology / Hitachi Semiconductor
Datasheet
1.DF2211NP24V.pdf
(756 pages)
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15.5
The A/D converter operates by successive approximation with 10-bit resolution. It has two
operating modes; single mode and scan mode. When changing the operating mode or analog input
channel, in order to prevent incorrect operation, first clear the bit ADST to 0 in ADCSR. The
ADST bit can be set at the same time as the operating mode or analog input channel is changed.
15.5.1
In single mode, A/D conversion is to be performed only once on the specified single channel. The
operations are as follows.
1. A/D conversion is started when the ADST bit is set to 1, according to software or external
2. When A/D conversion is completed, the result is transferred to the corresponding A/D data
3. On completion of conversion, the ADF bit in ADCSR is set to 1. If the ADIE bit is set to 1 at
4. The ADST bit remains set to 1 during A/D conversion. When A/D conversion ends, the ADST
Rev.7.00 Dec. 24, 2008 Page 542 of 698
REJ09B0074-0700
State of channel 0 (AN0)
State of channel 1 (AN1)
State of channel 2 (AN2)
State of channel 3 (AN3)
trigger input.
register to the channel.
this time, an ADI interrupt request is generated.
bit is automatically cleared to 0 and the A/D converter enters the wait state.
Figure 15.3 A/D Conversion Timing (Single-Chip Mode, Channel 1 Selected)
Single Mode
Operation
ADIE
ADST
ADF
ADDRA
ADDRB
ADDRC
ADDRD
Note: * Vertical arrows ( ) indicate instructions executed by software.
A/D
conversion
starts
Idle
Idle
Idle
Idle
A/D conversion
Set*
Set*
1
Idle
Clear*
Read conversion result*
A/D conversion result 1
A/D conversion
Set*
2
Read conversion result*
A/D conversion result 2
Clear*
Idle
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