Clock Output Controller Operations - NEC 78K0/KD1 Series User Manual

11.4 Clock Output Controller Operations

The clock pulse is output as the following procedure.
<1> Select the clock pulse output frequency with bits 0 to 3 (CCS0 to CCS3) of the clock output selection register
(CKS) (clock pulse output in disabled status).
<2> Set bit 4 (CLOE) of CKS to 1 to enable clock output.
Remark The clock output controller is designed not to output pulses with a small width during output
enable/disable switching of the clock output. As shown in Figure 11-4, be sure to start output from the
low period of the clock (marked with * in the figure). When stopping output, do so after securing high
level of the clock.
CLOE
Clock output
CHAPTER 11 CLOCK OUTPUT CONTROLLER
Figure 11-4. Remote Control Output Application Example
*
Preliminary User's Manual U16315EJ1V0UD
*
223