HD6437101 RENESAS [Renesas Technology Corp], HD6437101 Datasheet - Page 372
HD6437101
Manufacturer Part Number
HD6437101
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6437101.pdf
(560 pages)
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Section 11 A/D Converter
Bit
1
0
11.4
The A/D converter operates by successive approximation with 10-bit resolution. It has two
operating modes; single mode and scan mode. There are two kinds of scan mode: continuous
mode and single-cycle mode. When changing the operating mode or analog input channel, in order
to prevent incorrect operation, first clear the ADST bit to 0 in ADCR. The ADST bit can be set at
the same time when the operating mode is changed.
11.4.1
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 in ADCR is set to 1, according to software,
2. When A/D conversion is completed, the result is transferred to the A/D data register
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.1.00 Sep. 18, 2008 Page 338 of 522
REJ09B0069-0100
MTU, MMT, or external trigger input.
corresponding to the channel.
this time, an ADI interrupt request is generated.
bit is automatically cleared to 0 and the A/D converter enters the idle state.
When the ADST bit is cleared to 0 during A/D conversion, A/D conversion stops and the A/D
converter enters the idle state.
Bit Name
TRG0S1
TRG0S0
Operation
Single Mode
Initial Value
0
0
R/W
R/W
R/W
Description
AD Trigger 0 Select 1 and 0
Enable the start of A/D conversion by A/D0 with a
trigger signal.
00: A/D conversion start by external trigger pin
01: A/D conversion start by external trigger pin
10: A/D conversion start by MTU trigger is enabled
11: A/D conversion start by MMT trigger is enabled
When changing the operating mode, first clear the
TRGE and ADST bits in the A/D control registers
(ADCRs) to 0.
(ADTRG) or MTU trigger is enabled
(ADTRG) is enabled
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