Notes - NEC PD78212 User Manual

8-bit single-chip microcomputer sub-series

Table of Contents

µ PD78214 Sub-Series

10.7 NOTES

(1) Do not change CTXE from 0 to 1 and CRXE from 1 to 0, or vice versa, by means of a single instruction. If this

is attempted, the serial clock counter will malfunction and the first communication after the change will be

terminated before the eighth bit is sent. To change these statuses, use two instructions as shown below:

Example Changing CTXE from 1 to 0 and CRXE from 0 to 1

(2) When switching the master and slave, the input and output of the serial clock line (SCK) are asynchronously

switched between the master and slave. The serial clock line (SCK) requires a pull-up resistor.

(3) Do not set ACKT before the transfer has been completed.