SH7014 Datasheet, PDF (425/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

13. High Speed A/D Converter ⎯ SH7014 ⎯
13.4.8 A/D Conversion Time
The high speed A/D converter has an on-chip sample and hold circuit. The high speed A/D
converter samples the input at time t_D after the ADST bit is set to 1, and then starts the conversion.
The A/D conversion time t_CONV is the sum of the conversion start delay time t_D, the input sampling
time t_SPL, and the operating time t_CP. This conversion time is not a set value, but is decided by the t_D
ADCSR write timing, or the timer conversion start trigger generation timing.
Figure 13.11 shows an example of A/D conversion timing. Table 13.7 lists A/D conversion times.
φ
Address
Write signal
ADST
Sampling
timing
ADF
t_D
t_SPL
t_CP
t_CONV
Legend:
t_D: A/D conversion start delay time
t_SPL: Input sampling time
t_CONV: A/D conversion time
t_CP: Operation time
Figure 13.11 A/D Conversion Timing
Rev.5.00 Sep. 27, 2007 Page 391 of 716
REJ09B0398-0500