NEC V850E/PH2, User Manual

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Chapter 10 16-bit Inverter Timer/Counter R
User’s Manual U16580EE3V1UD00
10.8.1 A/D conversion trigger operation
Timer R has a function for generating A/D conversion start triggers (TRnADTRG0, TRnADTRG1
signals), freely selecting 4 trigger sources. The following 4 triggers sources are provided, which can be
specified with TRnOPT2 register bits TRnAT05 to TRnAT00 and TRnOPT3 register bits TRnAT15 to
TRnAT10. Here, control of the TRnADTRG0 using TRnAT05 to TRnAT00 is described. The same type
of control can be achieved for the TRnADTRG1 signal with control bits TRnAT15 to TRnAT10
(1) TRnADTRG0 signal output control
• TRnOPT2 register TRnAT00 = 1: Output of A/D conversion trigger upon valley interrupt
(INTTRnOD) output
• TRnOPT2 register TRnAT01 = 1: Output of A/D conversion trigger upon peak interrupt
(INTTRnCD) output
• TRnOPT2 register TRnAT02 = 1: A/D conversion trigger outputtable upon compare match
interrupt (INTTRnCC4) during counter up count
• TRnOPT2 register TRnAT03 = 1: A/D conversion trigger outputtable upon compare match
interrupt (INTTRnCC4) during counter down count
• TRnOPT2 register TRnAT04 = 1: A/D conversion trigger outputtable upon compare match
interrupt (INTTRnCC5) during counter up count
• TRnOPT2 register TRnAT05 = 1: A/D conversion trigger outputtable upon compare match
interrupt (INTTRnCC5) during counter down count
The A/D conversion start trigger signals selected with bits TRnAT05 to TRnAT00 are all O
Red
and
output to the TRnADTRG0 pin.
The peak and valley interrupts (INTTRnOD, INTTRnCD) selected with bits TRnAT00 and
TRnAT01 are the signals after interrupt thinning out. Therefore, they are output at the timing when
interrupt thinning out control is received, and when interrupt output enable (bits TRnICE and
TRnIOE) is not enabled, neither is any A/D conversion start trigger output.
Moreover, TRnOPT2 register bits TRnAT05 to TRnAT00 can be rewritten during operation.
When the A/D conversion start trigger setting bit is rewritten during operation, this is instantly
reflected to the output status of the A/D conversion start trigger.
These control bits do not have a reload function and are write accessed only in the anytime write
mode.