h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 647

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Figure 21.2 shows the operation timing.
1. Scan mode is selected (SCAN = 1), scan group 0 is selected (CH2 = 0), analog input channels
2. When A/D conversion of the first channel (AN0) is completed, the result is transferred to
3. Conversion proceeds in the same way through the third channel (AN2).
4. When conversion of all the selected channels (AN0 to AN2) is completed, the ADF flag is set
5. Steps 2 to 4 are repeated as long as the ADST bit remains set to 1. When the ADST bit is
State of channel 0 (AN0)
State of channel 1 (AN1)
State of channel 2 (AN2)
State of channel 3 (AN3)
AN0 to AN2 are selected (CH1 = 1, CH0 = 0), and A/D conversion is started (ADST = 1).
ADDRA. Next, conversion of the second channel (AN1) starts automatically.
to 1 and conversion of the first channel (AN0) starts again. If the ADIE bit is set to 1 at this
time, an ADI interrupt is requested after A/D conversion ends.
cleared to 0, A/D conversion stops. After that, if the ADST bit is set to 1, A/D conversion
starts again from the first channel (AN0).
Notes: 1. Vertical arrows ( ) indicate instructions executed by software.
ADDRA
ADDRB
ADDRC
ADDRD
ADST
ADF
2. Data currently being converted is ignored.
Figure 21.2 Example of A/D Converter Operation
Idle
(Scan Mode, Channels AN0 to AN2 Selected)
Idle
A/D conversion 1
Idle
Set *
1
A/D conversion 2
Transfer
Continuous A/D conversion execution
Idle
A/D conversion result 1
A/D conversion 3
Idle
Rev. 3.00 Mar 21, 2006 page 593 of 788
Idle
A/D conversion 4
A/D conversion time
A/D conversion result 2
A/D conversion result 3
Section 21 A/D Converter
A/D conversion 5
A/D conversion result 4
REJ09B0300-0300
Clear *
*
2
Idle
Idle
Idle
1
Clear *
1