CHAPTER 11 A/D CONVERTER
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11.6 Operation in Timer Trigger Mode
The A/D converter is the match interrupt signal of the TM11 compare register, and can set conversion timings to a
maximum of four channel analog inputs (ANI0 to ANI3).
TM11 and four capture/compare registers (CC110 to CC113) are used for the timer for specifying the analog
conversion trigger.
The following two modes are provided according to the value set in the TUM11 register.
(1) 1-shot mode
To use the 1-shot mode, the OST bit of the TUM11 register should be set to 1 (1-shot mode).
When the A/D conversion period is longer than the TM11 period, the TM11 generates an overflow, holds
0000H, and stops. Thereafter, TM11 does not output the match interrupt signal (A/D conversion trigger) of the
compare register, and the A/D converter also enters the A/D conversion standby state. The TM11 count
operation restarts when the valid edge of the TCLR11 pin input is detected or when 1 is written to the CE11 bit
of the TMC11 register.
(2) Loop mode
To use the loop mode, the OST bit of the TUM11 register should be set to 0 (normal mode).
When the TM11 generates an overflow, the TM11 starts counting from 0000H again, and the match interrupt
signal (A/D conversion trigger) of the compare register is repeatedly output and A/D conversion is also
repeated.
Содержание V850E/MS1 UPD703100
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