NEC 78K0S/KB1+ User Manual page 125

(23) External clock limitation
<R>
<1> When using an input pulse of the TI000 pin as a count clock (external trigger), be sure to input the pulse
width which satisfies the AC characteristics. For the AC characteristics, refer to CHAPTER 21 and
CHAPTER 22 ELECTRICAL SPECIFICATIONS.
<2> When an external waveform is input to 16-bit timer/event counter 00, it is sampled by the noise limiter
circuit and thus an error occurs on the timing to become valid inside the device.
Remark The count clock (f
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
Count clock (f )
sam
TI000
Sampling time on filter
Input pulse through
noise limiter circuit
) can be selected using bits 0 and 1 (PRM000, PRM001) of prescaler
sam
mode register 00 (PRM00).
User's Manual U17446EJ3V1UD
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