Cautions - NEC V850ES/KE1+ User Manual

7.6 Cautions

(1) Alternate functions of TI010/TO01 pins
Channel
TM01
• To perform the one-shot pulse output with detecting the valid edge of the TI010 pin as a trigger, use the
output of the TO01 pin that functions alternately as P32.
When using the output of the TO01 pin that functions alternately as P35, the TI010 pin that functions
alternately as P35 cannot be used.
When using only a software trigger (setting (1) TOC01.OSPT01 bit ) as the start trigger for the one-shot
pulse output, either of the P32 and P35 pins can be used as the TO01 pin output.
• To perform the TO01 pin output inversion operation by detecting the valid edge of the TI010 pin input,
use the output of the TO01 pin that functions alternately as P32.
When using the output of the TO01 pin that functions alternately as P35, the TI010 pin that functions
alternately as P35 cannot be used. Therefore, the TO01 pin output inversion operation by detecting the
valid edge of the TI010 pin input cannot be performed. When using the TO01 pin that functions
alternately as P35, clear the TMC01.TMC011 bit to 0.
(2) Error on starting timer
An error of up to 1 clock occurs before the match signal is generated after the timer has been started. This is
because the count of the TM01 register is started asynchronously to the count pulse.
TM01 count value
(3) Setting CR010 and CR011 registers (in the mode in which clear & start occurs upon match between TM01
register and CR010 register)
Set the CR010 and CR011 registers to a value other than 0000H (when using these registers as external event
counters, one-pulse count operation is not possible).
CHAPTER 7 16-BIT TIMER/EVENT COUNTER 0
Pin Alternate function
TI010 P35/TO01
TI011 P50/KR0/RTP00
TO01 P32/ASCK0/ADTRG
P35/TI010
Figure 7-46. Count Start Timing of TM01 Register
Count pulse
0000H
Timer start
User's Manual U16896EJ2V0UD
Shares the pin with TO01.
Assigned to two pins, P32 and P35.
0001H 0002H 0003H
Remarks
−
0004H
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