SH7101 Datasheet, PDF (371/486 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Table 11.4 A/D Conversion Time (Scan Mode)
CKS1
0
1
CKS0
0
1
0
1
Conversion Time (State)
1024 (Fixed)
512 (Fixed)
256 (Fixed)
128 (Fixed)
11. A/D Converter
11.4.5 A/D Converter Activation by MTU
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). When the
TRGS1 and TRGS0 bits in ADTSR are set to 00 or 01, if an A/D conversion request from the
interval timer of the MTU occurs, the ADST bit in ADCR is automatically set to 1. 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.
11.4.6 External Trigger Input Timing
A/D conversion can be externally triggered. When the TRGS0 and TRGS1 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 11.4 shows
the timing.
CK
ADTRG
External trigger
signal
ADST
A/D conversion
Figure 11.4 External Trigger Input Timing
Rev.2.00 Sep. 27, 2007 Page 337 of 448
REJ09B0394-0200