E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 724

• Manufacturer Part Number: E62655RUSB
• Description: EMULATOR BASE H8S/2655R W/USB
• Manufacturer: Renesas Electronics America
• Type: Microcontrollerr

Specifications of E62655RUSB

• Contents: E6000 Emulator Unit and 4 Logic Probes
• For Use With/related Products: H8S/2655R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 16 A/D Converter
16.4.4
Group scan mode is selected when A/D conversion is to be performed repeatedly on a number of
channels. This mode is suitable for constantly monitoring analog input on a number of channels.
A/D conversion is started when the ADST bit is set to 1, according to the specified conversion
start condition. The ADST bit remains set to 1 until cleared to 0 by software. During this time,
A/D conversion is performed repeatedly on the selected input channels.
When the first conversion operation ends for all the selected input channels, the ADF flag is set to
1. If the ADIE bit is set to 1 at this time, an ADI interrupt request is generated and A/D conversion
is temporarily halted. Clearing the ADF flag to 0 when conversion has been halted by an ADI
interrupt will restart conversion. The ADF flag is cleared by writing 0 after reading ADCSR. (It
can be cleared with the BCLR instruction.)
Figure 16.6 shows an example of A/D converter operation when AN
scan mode.
Rev. 5.00 Sep 14, 2006 page 694 of 1060
REJ09B0331-0500
ADF
ADST
Channel 0
Channel 1
Channel 2
Channel 3
ADDRA
ADDRB
ADDRC
ADDRD
Group Scan Mode
Figure 16.6 Example of A/D Converter Operation (Group Scan Mode)
Conversion
standby
Conversion standby
Conversion standby
Conversion standby
Set to 1 by software
Sampling 1
A/D
conversion 1
Sampling 2
A/D
conversion 2
Conversion
standby
Sampling 3
Conversion result 1
Sampling 4
A/D
conversion 3
Conversion
standby
Conversion result 2
A/D
conversion 4
Conversion
standby
Sampling 5
0
Conversion result 3
to AN
Cleared to 0 by
software
Sampling 6
A/D
conversion 5
2
are selected in group
Conversion result 4
Conversion
result 5
Conversion
stops