HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 596
HD6417144
Manufacturer Part Number
HD6417144
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417144.pdf
(930 pages)
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15. A/D Converter
Table 15.4 A/D Conversion Time (Scan Mode)
15.4.5
The A/D converter can be independently activated by an A/D conversion request from the interval
timer of the MTU.
To activate the A/D converter by the MTU, set the A/D trigger select register (ADTSR). After this
register setting has been made, the ADST bit in ADCR is automatically set to 1 when an A/D
conversion request from the interval timer of the MTU occurs. The timing from setting of the
ADST bit until the start of A/D conversion is the same as when 1 is written to the ADST bit by
software.
15.4.6
A/D conversion can be externally triggered. When the TRGS1 and TRGS0 bits are set to 00 or 01
in ADTSR, external trigger input is enabled at the ADTRG pin. A falling edge of the ADTRG pin
sets the ADST bit to 1 in ADCR, starting A/D conversion. Other operations, in both single and
scan modes, are the same as when the ADST bit has been set to 1 by software. Figure 15.3 shows
the timing.
Rev.4.00 Mar. 27, 2008 Page 552 of 882
REJ09B0108-0400
CKS1
0
1
A/D Converter Activation by MTU
External Trigger Input Timing
CK
ADTRG
External trigger
signal
ADST
CKS0
0
1
0
1
Figure 15.3 External Trigger Input Timing
Conversion Time (State)
1024 (Fixed)
512 (Fixed)
256 (Fixed)
128 (Fixed)
A/D conversion
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